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DS1338U-3+ - Low-Power I2C RTC with 56B NV RAM | Analog Devices
DS1338U-3+

DS1338U-3+ - Low-Power I2C RTC with 56B NV RAM | Analog Devices

The Analog Devices DS1338U-3+ is a low-power serial real-time clock with a full binary-coded decimal clock/calendar and 56 bytes of nonvolatile SRAM, available in an 8-pin µMAX/TSSOP-style package. It supports an I2C serial interface for address and data transfer. The device provides calendar fields including seconds, minutes, hours, day, date, month, and year, with automatic end-of-month adjustment for months having fewer than 31 days. A real-time clock is a clock-and-timing IC that maintains time independently of the system processor and can preserve calendar or configuration data across power interruptions. The DS1338U-3+ combines an RTC timebase with 56 bytes of NV SRAM, making it useful for embedded systems that need both timestamping and small quantities of retained data. Its low-power design suits battery-backed equipment where continued timekeeping is required while the main supply is absent. The verified manufacturer description identifies the DS1338 series as a full BCD clock/calendar with serial I2C access. The clock/calendar information includes seconds, minutes, hours, day, date, month, and year, while the end-of-month date is automatically adjusted for shorter months. The -3+ ordering suffix is associated with the 2.7 V device variant in the distributor data; exact electrical limits not present in the supplied source snippets are marked as data needed rather than inferred. Typical uses include industrial controllers, data loggers, meters, embedded instruments, and battery-powered systems that require an independent time reference. The I2C interface allows the host processor to read or write clock registers and access the NV SRAM without dedicating multiple parallel pins. Designers should preserve the device-specific pinout and verify voltage, current, oscillator, accuracy, and retention specifications against the manufacturer datasheet before releasing a production design. A key design consideration is matching the RTC supply architecture to the system power source. If the device is intended to maintain time during a main-power interruption, the backup supply and current-consumption requirements must be designed together with the load switch and battery path. The host firmware should also account for I2C address configuration and calendar rollover behavior. This page combines verified distributor and manufacturer information, structured specifications, application guidance, design notes, and only the drop-in alternatives supported by the supplied cross-reference data. It is intended to help engineers evaluate the DS1338U-3+ for embedded timing and nonvolatile data-retention designs while avoiding unsupported assumptions.

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DS1338U-3+T&R - 3.3V I2C RTC with 56B NV SRAM | Maxim
DS1338U-3+T&R

DS1338U-3+T&R - 3.3V I2C RTC with 56B NV SRAM | Maxim

Analog Devices / Maxim Integrated DS1338U-3+T&R is a 3.3 V serial real-time clock with 56-byte nonvolatile SRAM, a full binary-coded decimal clock and calendar, and an I2C interface in an 8-TSSOP package. The DS1338U family maintains seconds, minutes, hours, day, date, month, and year information while automatically adjusting the end-of-month date for months with fewer than 31 days. Its combination of real-time clock and nonvolatile memory supports systems that require persistent configuration or event data alongside accurate calendar time. A real-time clock is a semiconductor timer that continues tracking time independently of the system processor. The DS1338U belongs to the RTC and clock/calendar hierarchy, where the clock oscillator and calendar logic preserve time while the host controller reads and writes registers through a serial bus. Its I2C interface reduces the number of signal connections needed compared with a parallel real-time clock, making it suitable for compact embedded systems, industrial controllers, and data-acquisition equipment. The verified device information identifies an 8-pin package with gull-wing leads, an I2C two-wire serial interface, 56 bytes of NV RAM, and a 2.7 V to 3.3 V supply range. The DS1338U-3+T&R ordering code denotes the 3.3 V version supplied in tape-and-reel packaging. The manufacturer describes the device as low power and provides full BCD clock/calendar information. Additional operating limits, oscillator accuracy, current consumption, and electrical timing values are not included in the supplied verified records and therefore remain marked as data needed rather than being estimated. The DS1338 architecture separates timekeeping from the host processor, allowing the controller to retrieve calendar data without maintaining a software time counter. The 56-byte NV RAM can retain a limited amount of configuration or operational information across power cycles. Because the device uses I2C, its bus pull-up requirements, address configuration, operating voltage, and backup-power behavior must be checked against the complete manufacturer datasheet before layout signoff or firmware deployment. Typical uses include industrial automation controllers, embedded instrumentation, metering equipment, communications systems, and compact control boards that need date and time records. In a metering application, the RTC can establish event timestamps while NV RAM stores configuration fragments. In industrial control, it can preserve a time reference independently of the main controller. In communications equipment, the calendar can support event logging and protocol timestamping when the host does not maintain reliable wall-clock time. The primary design consideration is to verify the complete electrical and pinout data before PCB release. The supplied records identify the package and interface but do not provide a verified pin-by-pin description, oscillator load-capacitor recommendations, or backup-supply requirements. Designers should therefore confirm those details in the current Analog Devices DS1338 or DS1338U datasheet rather than infer them from the distributor summaries. This page consolidates the verified manufacturer description, distributor package and supply information, and drop-in comparison evidence for the DS1338U family. It also distinguishes directly verified attributes from unavailable parameters, helping engineers identify the correct voltage variant and determine whether a same-package family member can replace the target without unnecessary redesign.

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DS1338U-33+ - I²C RTC with 56B NV RAM | Analog Devices
DS1338U-33+

DS1338U-33+ - I²C RTC with 56B NV RAM | Analog Devices

Analog Devices DS1338U-33+ is a low-power serial real-time clock and calendar with 56 bytes of nonvolatile SRAM, a 3 V to 5.5 V supply range, and an I²C interface in an 8-pin TSSOP or MSOP package. The -33 suffix identifies the device configuration, while the integrated BCD clock/calendar tracks seconds, minutes, hours, day, date, month, and year. A real-time clock is an integrated circuit that maintains time independently of a system processor. The RTC category sits within clock and timing ICs and broader semiconductor timing systems. Unlike a software timer, the DS1338U-33+ can preserve calendar time when the main supply is removed and the device is connected to a backup source, making it useful for systems requiring time stamps, event logging, or scheduling after power restoration. The DS1338U-33+ combines a full BCD clock/calendar with 56 bytes of NV SRAM in one package. Its serial address and data path uses the I²C interface, reducing the number of microcontroller connections compared with a parallel calendar device. The manufacturer describes automatic month-end adjustment for months containing fewer than 31 days, which reduces firmware work when validating date rollover behavior. The integrated SRAM gives the host controller space for small quantities of persistent data without adding a separate memory IC. Applications can store configuration bytes, counters, alarms, or system state alongside the calendar. Because the available source data does not state the exact endurance, retention time, current consumption, oscillator accuracy, or I²C address, those values should be confirmed in the manufacturer datasheet before final qualification. Typical uses include industrial controllers, data loggers, metering equipment, embedded instruments, and access-control or security systems that need a persistent timestamp. The I²C interface is particularly convenient for microcontrollers and system processors that already use a two-wire bus. Designers should account for I²C pull-up resistors, address selection, backup-source isolation, and startup behavior when the main supply returns. The principal design consideration is preserving the correct time across power loss. Follow the manufacturer backup-battery guidance, use the specified decoupling and pull-up networks, and avoid loading the backup source when the main supply is active. Verify the exact package variant and pin mapping against the ordering code because the supplied distributor records reference both 8-TSSOP and 8-MSOP forms. This product record combines current distributor availability, manufacturer functional details, package information, and verified cross-reference results. It also distinguishes documented drop-in candidates from merely similar RTC devices, helping engineers avoid assuming that equivalent timekeeping functions guarantee identical pin compatibility, memory capacity, or package geometry.

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DS1338U-33/T&R - 56B I2C RTC | Analog Devices
DS1338U-33/T&R

DS1338U-33/T&R - 56B I2C RTC | Analog Devices

The Analog Devices DS1338U-33/T&R is a low-power serial real-time clock with a BCD clock/calendar, 56 bytes of nonvolatile SRAM, and an I2C interface, supplied in an 8-pin uSOP package. Its operating supply range is 3 V to 5.5 V, its temperature range is -40°C to +85°C, and the DS1338U-33 suffix identifies the 3.3 V configuration. The device maintains calendar information including seconds, minutes, hours, day, date, month, and year while automatically accounting for months with fewer than 31 days. A real-time clock is a clock-and-timing integrated circuit that preserves time independently of a host processor and system clock. In the component hierarchy, an RTC is a timing IC, a clock-and-calendar device, and ultimately a semiconductor designed for timekeeping and data retention. Unlike a microcontroller timer, the DS1338U can continue maintaining calendar time from a backup source when the main system supply is unavailable, subject to the application backup circuit. The principal feature is 56 bytes of battery-backed nonvolatile SRAM alongside the calendar registers. Address and data move serially through the two-wire I2C interface, allowing a host microcontroller to read or update time and retain small quantities of configuration or operational data. The device includes automatic end-of-month correction, as stated on the Analog Devices product page, reducing host software complexity. A square-wave output provides a periodic reference that can support system timing, alarms, or periodic interrupts when the host schedules an interrupt. The DS1338U is designed for low-power embedded systems that require accurate wall-clock time and a small amount of persistent storage. Its I2C interface reduces the number of connections compared with a parallel RTC, making it suitable for compact controller boards. The -33 configuration is useful where a 3.3 V system is prominent, while the documented 3 V to 5.5 V supply range provides flexibility across industrial and embedded equipment operating from compatible rails. Exact oscillator accuracy and current-consumption figures are not present in the supplied source data and therefore require confirmation in the manufacturer datasheet. Typical uses include industrial controllers, embedded instruments, data-acquisition systems, access-control terminals, and compact communications equipment. Its calendar and persistent-memory functions can record operating events without repeatedly writing nonvolatile data to flash. In designs where wall-clock continuity matters, the backup-supply architecture should be implemented and tested independently of the main 3.3 V rail rather than assuming that a backup capacitor alone meets every retention requirement. PCB design should preserve the I2C signal integrity by keeping SDA and SCL routing short, using continuous ground references, and avoiding long stubs between the DS1338U and its host. Place required input and backup capacitors close to their associated pins. Verify the oscillator crystal or resonator connection against the manufacturer reference layout, because incorrect loading or excessive trace length can affect time accuracy. The uSOP-8 footprint is compact, but exposed-pad-free implementations still require adequate copper for stable electrical and thermal behavior. This page combines the verified manufacturer description, distributor package and ordering information, documented supply and temperature limits, and cross-reference results for the DS1338 family. It also distinguishes true pin-compatible candidates from parts with different packages or added functions, providing practical guidance for RTC selection, replacement, sourcing, and circuit integration.

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DS1338Z-18+ I2C RTC with 56-Byte NV SRAM | Analog Devices
DS1338Z-18+

DS1338Z-18+ I2C RTC with 56-Byte NV SRAM | Analog Devices

Analog Devices DS1338Z-18+ is an I2C serial real-time clock and calendar with 56 bytes of nonvolatile SRAM, a 1.71 V to 5.5 V operating range, and an 8-pin NSOIC package. The integrated RTC records seconds, minutes, hours, day, date, month, and year in binary-coded decimal format while providing serial access to address and calendar data through the I2C bus. Its nonvolatile RAM allows embedded systems to retain small amounts of configuration or diagnostic information without adding a separate memory component. A real-time clock is a clock-and-calendar integrated circuit that maintains time independently of a host processor. Within the broader semiconductor hierarchy, the DS1338Z-18+ is an RTC within the clock and timing category of integrated circuits. Its serial interface reduces wiring requirements compared with a parallel calendar device, while the integrated BCD clock simplifies time representation and allows software to process familiar date and time values. The principal features include a full BCD clock and calendar, automatic month-end adjustment for months with fewer than 31 days, and 56 bytes of NV SRAM. The I2C interface transfers address and data serially, making the device suitable for embedded systems that already use shared two-wire buses. Its 1.71 V to 5.5 V supply range supports both lower-voltage and conventional 5 V system rails. The 8-pin NSOIC package is designed for compact surface-mount PCB layouts. The DS1338 architecture combines a dedicated timekeeping section with accessible nonvolatile storage in one package. Calendar data includes seconds, minutes, hours, day, date, month, and year, and the device automatically adjusts the end-of-month date when a month contains fewer than 31 days. Because the target DS1338Z-18+ is specified for an 18 variant within the DS1338 family, engineers should confirm the exact temperature and order-code requirements against the manufacturer data before releasing production quantities. Typical uses include industrial controllers, data-acquisition equipment, instrument panels, embedded telemetry, access-control terminals, and compact consumer appliances. The RTC is especially useful when the main controller can be reset or powered down but the system must retain a credible wall-clock time and a small amount of state. Systems that also need larger nonvolatile storage should use the RTC for timekeeping and add a separate serial flash or EEPROM device. PCB implementation should provide a stable supply and clean ground return because oscillator-based timekeeping accuracy can be affected by electrical noise and poor layout. Keep the I2C traces short, route them away from noisy switching nodes, and follow the manufacturer’s recommended bypass-capacitor arrangement. Firmware should detect communication faults and treat the RTC as a backup time source when validating calendar fields after a power interruption. This page consolidates verified manufacturer and distributor information, package details, sourcing data, design guidance, and same-family replacement candidates. It distinguishes confirmed public facts from specifications that still require confirmation from the complete manufacturer data sheet, helping engineers make a faster and more defensible sourcing decision.

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DS1338Z-18+T&R - I2C RTC with 56B NV SRAM | Analog Devices
DS1338Z-18+T&R

DS1338Z-18+T&R - I2C RTC with 56B NV SRAM | Analog Devices

The Analog Devices DS1338Z-18+T&R is a low-power serial real-time clock with a full binary-coded decimal clock/calendar and 56 bytes of nonvolatile SRAM, housed in an 8-pin narrow SOIC package measuring 3.90 mm wide. It transfers addresses and data through a two-wire I2C serial interface, providing compact timekeeping and configuration storage for embedded systems. A real-time clock is a clock-and-timing integrated circuit that preserves calendar time independently of the main processor clock. The DS1338 family belongs to the RTC and clock-and-timing hierarchy, where an RTC supplies seconds, minutes, hours, day, date, month, and year information. Its integrated nonvolatile memory allows a host controller to retain operating parameters without adding a separate memory component. The principal features visible in the manufacturer documentation include full BCD clock and calendar data, automatic adjustment for months with fewer than 31 days, serial address and data transfer, and 56 bytes of NV SRAM. The I2C interface reduces the number of signal lines required when compared with a parallel RTC, while the narrow SOIC-8 package supports conventional surface-mount PCB assembly. The DS1338 separates calendar management from the host processor by maintaining time whenever the system is powered by an appropriate backup supply. Calendar fields include seconds, minutes, hours, day, date, month, and year. The automatic month-end adjustment reduces firmware complexity because the device accounts for variable month lengths rather than requiring the controller to implement every calendar correction itself. Typical uses include industrial controllers, data loggers, metering equipment, embedded instrumentation, battery-backed appliances, and connected products that need timestamps. The 56-byte NV SRAM can retain configuration, counters, calibration values, or diagnostic history, subject to the device's operating and retention limits documented by the manufacturer. Designers should place the I2C pull-up resistors and backup-capacitor network according to the manufacturer datasheet, maintain the required logic levels and timing, and avoid assuming that the DS1338's NV SRAM has unlimited endurance. Firmware should detect and recover from invalid BCD or oscillator-start conditions where reliability is important. This product page combines the verified manufacturer description with distributor packaging, inventory, and pricing data, plus practical guidance covering I2C implementation, backup behavior, calendar handling, and component selection. It is intended to help engineers find the correct 8-SOIC ordering code and distinguish the RTC's digital functionality from its electrical operating limits.

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DS1338Z-3+ I²C RTC with 56-Byte NV RAM | Maxim Integrated
DS1338Z-3+

DS1338Z-3+ I²C RTC with 56-Byte NV RAM | Maxim Integrated

The Maxim Integrated DS1338Z-3+ is a low-power I²C real-time clock and calendar with 56 bytes of nonvolatile SRAM, a 2.7 V to 5.5 V supply range, and an 8-pin SOIC package. It stores seconds, minutes, hours, day, date, month, and year in full binary-coded decimal format and transfers address and data through a two-wire serial interface. A real-time clock is a timekeeping integrated circuit that maintains calendar information independently of the system processor. The DS1338Z belongs to the RTC and clock/calendar hierarchy within time and memory management semiconductors. Its integrated NV SRAM gives an embedded system a small amount of persistent storage alongside the calendar, which is useful for counters, configuration records, alarms, or small state variables. The DS1338Z automatically accommodates months with fewer than 31 days, according to the Analog Devices product description. The verified manufacturer pages identify the device as a full BCD clock/calendar with 56 bytes of NV SRAM. The -3 suffix distinguishes this orderable variant, while the Z package suffix corresponds to the 8-pin SOIC format shown in distributor listings. These facts are directly relevant when firmware relies on BCD-formatted registers or on persistent data surviving a reset and power cycle. The I²C interface allows the host controller to read and write the clock, calendar, alarms, and SRAM registers serially. This reduces wiring compared with a parallel RTC and supports compact embedded systems. The verified distributor data identifies the component as an 8-SOIC device measuring 3.90 mm wide. Designers should follow the manufacturer datasheet for register addresses, electrical limits, timing, oscillator behavior, and pin assignments rather than infer them from the package outline. Typical uses include industrial controllers, embedded instruments, data-acquisition equipment, access-control terminals, and compact embedded systems that need calendar timestamping with a small persistent memory area. In firmware, the RTC can maintain wall-clock time while the host sleeps, and the NV RAM can retain a limited amount of operating state. The -40°C to +85°C range and 2.7 V to 5.5 V supply range reported by LCSC make the part broadly compatible with embedded industrial and commercial environments. The principal design consideration is verifying software compatibility with the exact BCD register map and I²C address behavior. Firmware must distinguish BCD time values from binary values, handle month-end rollover, and preserve intended SRAM contents across intentional resets and power loss. This page combines verified manufacturer and distributor information, pricing context as of 2026-10-23, package details, application guidance, and explicitly separated drop-in alternatives. This product data is organized for engineers who need a verifiable DS1338Z-3+ purchasing reference. It distinguishes confirmed specifications from information that requires the manufacturer datasheet, avoids unsupported performance claims, and provides practical integration context for I²C real-time clock and nonvolatile memory designs.

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DS1338Z-3+T&R - I2C RTC with 56B NV RAM | Analog Devices
DS1338Z-3+T&R

DS1338Z-3+T&R - I2C RTC with 56B NV RAM | Analog Devices

Analog Devices DS1338Z-3+T&R is a low-power serial real-time clock and clock/calendar with 56 bytes of nonvolatile RAM, a 2.7 V to 5.5 V supply range, and an 8-pin SOIC package. The integrated RTC records seconds, minutes, hours, day, date, month, and year while automatically adjusting month-end dates for months with fewer than 31 days. Address and data transfer through a two-wire I2C interface, making the device suitable for compact embedded systems that require persistent timekeeping and a small amount of nonvolatile data storage. A real-time clock is a timing IC that maintains calendar information independently of the host processor's main clock. The DS1338 belongs to the RTC and clock/calendar hierarchy within clock and timing integrated circuits. By separating continuous timekeeping from the central processing unit, it reduces firmware overhead and allows the system time to remain available across resets, power interruptions, and low-power operating states when supported by the associated backup supply arrangement. Key features include a full binary-coded decimal clock/calendar, automatic month-end correction, 56 bytes of nonvolatile RAM, serial two-wire communication, and an operating temperature range of -40 C to +85 C. The 2.7 V to 5.5 V operating range supports both 3.3 V and 5 V system rails. Its SOIC-8 package provides a conventional surface-mount footprint compatible with automated assembly and compact mixed-signal or embedded-control boards. The RTC architecture separates calendar processing from the external host while the I2C interface exposes registers and RAM to the processor. Firmware can read the current time, configure clock settings, and use the 56-byte RAM for small amounts of retained configuration or diagnostic information. Because the communication bus is shared, address integrity, pull-up implementation, and software access timing are important considerations when the device shares an I2C segment with sensors, memory, or interface expanders. Typical uses include industrial data loggers, building automation controllers, medical monitoring equipment, security systems, industrial sensors, and compact communication equipment. In each case, the device can maintain wall-clock time while the main controller sleeps or restarts. The integrated RAM also allows small system-specific values to survive a reset without adding a separate memory component. The principal design consideration is preserving an accurate reference during supply interruptions. The DS1338Z-3+T&R is specified for 2.7 V to 5.5 V operation and includes NV RAM, but the supplied product information does not state the backup-battery configuration, oscillator accuracy, or capacitor values. Those parameters must therefore be confirmed in the manufacturer datasheet before finalizing a timekeeping circuit. This product record combines verified manufacturer and distributor information with package, interface, comparison, and design guidance. It identifies where the DS1338Z-3+T&R fits within embedded timekeeping designs, documents the verified 56-byte RAM and I2C characteristics, and distinguishes supported drop-in alternatives without introducing unverified electrical claims.

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DS1338Z-33+ - I2C RTC with 56-Byte NV RAM | Analog Devices
DS1338Z-33+

DS1338Z-33+ - I2C RTC with 56-Byte NV RAM | Analog Devices

The Analog Devices DS1338Z-33+ is a low-power serial real-time clock and calendar with 56 bytes of nonvolatile SRAM, a 3 V to 5.5 V supply range, and an 8-pin SOIC package. It stores calendar and time information in full binary-coded decimal (BCD) format and transfers addresses and data through a two-wire I²C interface. A real-time clock is a clock-and-calendar IC that maintains time independently of a host processor. In the hierarchy of electronic components, the DS1338 belongs to the real-time clock category, then timing ICs, then integrated circuits and semiconductors. Its combination of BCD calendar registers, I²C connectivity, and battery-backed nonvolatile memory makes it useful in embedded systems that require readable time information and persistent configuration storage. Key verified features include seconds, minutes, hours, day, date, month, and year information; automatic month-end adjustment for months with fewer than 31 days; 56 bytes of NV SRAM; and operation from 3 V to 5.5 V. The device is supplied in an 8-SOIC package with a 3.90 mm width. The supplied distributor result identifies the part as a clock/calendar IC with a two-wire serial interface and 56-byte NV RAM. The BCD register organization simplifies direct connection with embedded host software and allows calendar fields to be read over I²C without binary-to-decimal conversion in every register representation. The NV SRAM can retain board-specific data such as configuration values, counters, calibration information, or serialized identifiers when the system is operating from its backup supply. Typical uses include industrial control equipment, data loggers, embedded instruments, access-control terminals, connected sensors, and consumer products requiring a persistent timestamp. The I²C interface allows the RTC to share a two-wire bus with compatible devices, reducing the number of host-controller pins required for timekeeping and small nonvolatile storage. When laying out a design, confirm the SOIC footprint, battery-backup arrangement, I²C address configuration, and decoupling requirements against the manufacturer datasheet. This page distinguishes verified facts from parameters not supplied in the retrieved data and avoids inferring missing electrical or timing values.

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DS1338Z-33+T&R - I2C RTC with 56B NV SRAM | ADI
DS1338Z-33+T&R

DS1338Z-33+T&R - I2C RTC with 56B NV SRAM | ADI

The Analog Devices DS1338Z-33+T&R is a low-power serial real-time clock (RTC) with a full binary-coded decimal (BCD) clock/calendar and 56 bytes of nonvolatile SRAM. It uses a two-wire I2C interface for serial address and data transfer and is supplied in an 8-pin SOIC package. The clock/calendar maintains seconds, minutes, hours, day, date, month, and year information. A real-time clock is an integrated timing device that maintains calendar information independently of a system’s main processor. The RTC category belongs to the broader timing and clock hierarchy and supports timekeeping in embedded systems. The DS1338 combines that calendar function with 56 bytes of nonvolatile SRAM, allowing a controller to retain small amounts of configuration, diagnostic, or application data alongside the time and date. The key feature of the DS1338 family is its compact integration. One 8-pin SOIC device provides an I2C-connected BCD clock/calendar and nonvolatile memory. The manufacturer describes automatic end-of-month adjustment for months with fewer than 31 days, reducing date-management burden in firmware. The verified distributor listing identifies the target as an 8-SOIC real-time clock with 56 bytes of I2C-accessible nonvolatile SRAM. The DS1338Z-33+ device family supports a 3 V to 5.5 V operating range, as reported in the verified component search data. Its serial architecture reduces the number of communication lines required from a microcontroller or other embedded controller. Because address and data share the same two-wire bus, software must distinguish register addresses from register data using the device’s documented I2C protocol and acknowledge behavior. Typical uses include industrial embedded controllers, data-acquisition equipment, communication systems, access-control hardware, and compact consumer products that require persistent timestamps. In these systems, the RTC can retain time across power interruptions while the host controller records events, schedules operations, or timestamps stored measurements. The 56-byte nonvolatile SRAM is useful when a small amount of state must survive a reset or power cycle. Designers should provide the clock circuit and power structure exactly as specified by the manufacturer datasheet, including required crystal or oscillator components and the applicable VCC and VBAT arrangements. Software should also confirm the correct 3.3 V-related device variant and validate BCD-to-decimal conversion, rollover behavior, and I2C address handling during commissioning. This page consolidates verified manufacturer and distributor information for the DS1338Z-33+T&R, adds practical application and design guidance, and identifies drop-in alternatives from the supplied cross-reference search results. It is intended to support component selection without treating unreported electrical details as guaranteed specifications.

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DS1501WEN+ - Y2K-Compliant Watchdog RTC, 256B NV SRAM | Maxim
DS1501WEN+

DS1501WEN+ - Y2K-Compliant Watchdog RTC, 256B NV SRAM | Maxim

The Maxim Integrated (now Analog Devices) DS1501WEN+ is a full-function, Y2K-compliant real-time clock/calendar (RTC) with RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes of NV SRAM, and a 32.768 kHz output, housed in a 28-pin TSSOP (0.465 inch / 11.80 mm width) package. It operates from 3.0 V to 3.6 V supply (typical 3.3 V) with an extended operating temperature range of -40 C to +85 C, and exposes a parallel address/data bus interface. What is an RTC? A Real-Time Clock (RTC) is a dedicated timekeeping integrated circuit that maintains accurate wall-clock time (seconds, minutes, hours, day, date, month, year, century) even when the host system is powered down, typically by backup battery or supercapacitor. RTCs belong to the broader family of clock/calendar ICs, which sit under the timing & application category and ultimately under the power management / system supervision domain. RTCs differ from MCU-internal timers in that they run independently of the host CPU and continue counting through power loss. Key features of the DS1501WEN+ include Y2K-compliant century register, integrated watchdog timer for host firmware supervision, power-on reset and battery monitor circuits, 256 bytes of non-volatile SRAM that retains data through battery backup, and a buffered 32.768 kHz output for downstream clock distribution. The parallel bus allows byte-wide register access for fast data reads/writes. Internally, the DS1501 uses a low-power CMOS oscillator driving a chain of BCD-coded registers (century, year, month, date, day, hours, minutes, seconds). The on-chip NV SRAM is automatically switched to backup battery when VCC falls below a programmable threshold, and the device asserts RST on power-up to safely initialize the host CPU. The watchdog can be programmed to reset the host if a strobe is not received within a defined window. Typical applications include embedded industrial controllers requiring time-stamped event logging, point-of-sale (POS) terminals, secure access controllers, medical instruments with battery-backed timekeeping, and server/workstation BIOS clock replacement. The wide temperature range and integrated supervisory functions make it suitable for harsh environments. When designing with this device, ensure VBAT is connected to a backup lithium coin cell or supercapacitor through the recommended decoupling network; verify that the host's parallel bus timing matches the DS1501 access specifications. The XAIPART datasheet documents detailed read/write timing diagrams and battery switchover thresholds. This product page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet.

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DS15BR400TVS/NOPB - 4-Ch LVDS Buffer 2Gbps TQFP-48 | Texas Instruments
DS15BR400TVS/NOPB

DS15BR400TVS/NOPB - 4-Ch LVDS Buffer 2Gbps TQFP-48 | Texas Instruments

The Texas Instruments DS15BR400TVS/NOPB is a 4-channel LVDS buffer/repeater (ReDriver) supporting data rates up to 2 Gbps per channel, operating from a 3.0 V to 3.6 V supply with a typical supply current of 215 mA, housed in a 48-pin TQFP (PFB) package measuring 7 x 7 mm. An LVDS buffer/repeater is a signal-conditioning interface IC that sits in the middle of a high-speed differential data path. It receives degraded low-voltage differential signaling (LVDS) or Bus LVDS waveforms, regenerates clean logic levels, and re-transmits them, restoring signal integrity over lossy media. In the system hierarchy, it belongs to the signal buffer/repeater class of interface ICs, bridging serializers, deserializers, and backplanes in high-speed digital systems. Key differentiating features include pre-emphasis that overcomes intersymbol interference (ISI) jitter effects from lossy backplanes and cables, a flow-through pinout that simplifies board layout and minimizes internal device jitter, and compatibility with LVDS and Bus LVDS signal levels such as those used by TI 10-, 16-, and 18-bit serializers and deserializers (SerDes). Architecturally, the DS15BR400 uses high-speed differential input buffers followed by output drivers with selectable pre-emphasis, keeping the internal data path short and symmetric. This low-jitter design preserves eye opening at 2 Gbps, which is critical for bit-error-rate targets in multi-gigabit links. The NOPB suffix denotes a lead-free, RoHS-compliant finish. Typical applications include rack-card backplane interconnects, point-to-point cable driver and receiver links, chassis-to-chassis high-speed data distribution, and buffering of SerDes links in industrial, medical imaging, and telecom equipment where signals must traverse long lossy traces or cables. A key design consideration: pre-emphasis increases output swing and therefore power dissipation, so apply only the level needed for the channel loss; excessive pre-emphasis can degrade signal margin at the far end. Verify supply decoupling with low-ESR ceramics close to each VCC pin. This page synthesizes verified distributor data, drop-in alternative analysis, pricing tiers, and practical engineering design notes not found in the manufacturer datasheet.

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DS160PR410RNQR - 4-Ch PCIe Gen-4 Linear Redriver | Texas Instruments
DS160PR410RNQR

DS160PR410RNQR - 4-Ch PCIe Gen-4 Linear Redriver | Texas Instruments

The Texas Instruments DS160PR410RNQR is a quad-channel low-power, high-performance linear repeater/redriver designed to support PCI Express (PCIe) Generation 1.0, 2.0, 3.0 and 4.0 in a 40-pin WQFN (RNQ) 6x4 mm package with exposed thermal pad. The device operates up to 16 Gbps per lane for PCIe 4.0 and up to 25 Gbps for protocol-agnostic interfaces including Ultra Path Interface (UPI) 2.0. A redriver is a signal-conditioning device that sits between a transmitter and receiver on a high-speed serial link to compensate for channel loss. It uses continuous-time linear equalizers (CTLE) to apply frequency-dependent gain that restores the high-frequency components attenuated by the PCB trace, connector, and cable. The DS160PR410's CTLE boosts up to 18 dB at 8 GHz, which extends channel reach beyond what a passive link budget would normally allow. The device also includes automatic receiver detection tailored to PCIe use cases, allowing seamless insertion on a powered link. Key features of the DS160PR410RNQR include CTLE boost up to 18 dB at 8 GHz, automatic receiver detection for PCIe, integrated termination, individual channel enable/disable via I2C or pin strap, low latency suitable for forward and reverse direction signaling, and 3.3 V single-supply operation. The device is protocol agnostic, meaning it can be repurposed for any AC-coupled, NRZ differential interface up to 25 Gbps without protocol-specific state machines. The architecture uses a linear equalizer at each input followed by a limiting or linear output driver. Unlike retimers, redrivers do not require clock-data recovery (CDR) and do not add protocol latency, making them ideal for PCIe-compliant systems where every nanosecond of added latency must be accounted for in link training. The DS160PR410 supports both linear and limiting modes, giving designers flexibility between preserving multi-level eye characteristics or maximizing output swing. Typical applications include server and workstation motherboards, NVMe SSD riser cards, backplanes, and riser cards that need to recover PCIe signal integrity across long trace routes or through connectors. Industrial and embedded computing platforms with PCIe over cable also benefit. Because the device is protocol agnostic, it can be used for UPI 2.0, SATA, SAS, and other AC-coupled NRZ interfaces up to 25 Gbps. When designing with the DS160PR410RNQR, AC-coupling capacitors must be placed on the upstream transmit side of each redriver channel. The device supports SMBus/I2C control for fine-grained CTLE adjustment, or pin-strap configuration for simple deployment. Layout should keep high-speed differential traces length-matched within the channel and use 85 ohm differential impedance. Refer to the manufacturer datasheet for full register map and recommended PCB footprint. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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DS160PR410RNQT - 4-Ch PCIe Gen-4 Linear Redriver, 25 Gbps, 40-WQFN | TI
DS160PR410RNQT

DS160PR410RNQT - 4-Ch PCIe Gen-4 Linear Redriver, 25 Gbps, 40-WQFN | TI

The Texas Instruments DS160PR410RNQT is a four-channel, low-power, high-performance linear repeater/redriver designed to support PCI Express (PCIe) Generation 1.0, 2.0, 3.0, and 4.0, with protocol-agnostic operation up to 25 Gbps including Ultra Path Interface (UPI) 2.0 and DisplayPort. The part is housed in a 40-pin WQFN (RNQ) 6x4 mm package and integrates four CTLE-equipped receivers that can boost high-frequency loss by up to 18 dB at 8 GHz. A linear redriver (also called a linear repeater or signal conditioner) is a protocol-agnostic high-speed interface IC placed between a transmitter and a receiver to restore signal amplitude and edge rate after channel loss. It sits in the signal-path hierarchy between the physical medium (PCB traces, connectors, cables) and the PHY/SerDes, complementing retimers (which include a CDR and re-clock) by offering lower latency and lower power at the cost of no jitter cleaning. Key features include automatic receiver detection for PCIe use cases, programmable CTLE equalization up to 18 dB at 8 GHz to extend channel reach, integrated termination, low additive jitter, and per-channel equalizer adjustment through pin-strap or SMBus/I2C control. The device supports AC-coupled transmitter common-mode voltage, low stand-by current, and an operating temperature range of -40 C to +85 C. The DS160PR410 uses a continuous-time linear equalizer architecture on each receive path to compensate for frequency-dependent loss from FR4 PCB traces, long cables, and connector crosstalk. Because the redriver is linear (not a retimer), the part adds minimal latency (typically <100 ps per channel) and preserves TX de-emphasis / RX CTLE training handshakes, allowing seamless insertion in PCIe link training without protocol glue logic. Typical applications include server and workstation motherboards (CPU-to-PCIe slot signal conditioning), PCIe riser cards, external PCIe enclosures, storage controllers (NVMe SSD backplanes), accelerator cards (GPU/AI PCIe Gen-4 add-in cards), and embedded platforms that need loss compensation across long PCB routes or backplanes. When laying out a board, place the redriver as close as possible to the lossy element (connector or long trace) and provide a continuous reference-plane ground beneath the WQFN-40 exposed pad for both thermal dissipation and return-path integrity. Decouple each VCC pin with a 0.1 uF X7R cap and a 4.7 uF bulk capacitor to keep the internal CTLE bias network stable.

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DS2250-32-16 - 8051 Soft MCU, 16MHz, 32KB NVSRAM, 40-SIMM
DS2250-32-16

DS2250-32-16 - 8051 Soft MCU, 16MHz, 32KB NVSRAM, 40-SIMM

The Analog Devices (formerly Maxim Integrated / Dallas Semiconductor) DS2250-32-16 is a soft microcontroller module built around an 8051-compatible 8-bit CMOS core, paired with 32KB (32K x 8) of nonvolatile SRAM and operating at up to 16 MHz clock speed, all integrated into a 40-pin SIMM form factor that plugs into a standard SIMM socket. The part preserves program and data memory through power loss thanks to its integrated nonvolatile SRAM and on-chip lithium-backed retention, allowing firmware and runtime data to survive indefinitely without VCC. What is a soft microcontroller? A soft microcontroller module is a self-contained 8051 system - core, program memory, data memory, oscillator - that can be programmed in-circuit through an on-chip serial port and that retains its code in nonvolatile SRAM. The 8051 family itself belongs to the larger microcontroller category, itself a sub-category of microcomputers and embedded processors within the Integrated Circuits hierarchy. Soft modules differ from mask-ROM MCUs in that firmware can be reloaded and updated in end equipment without an external programmer, simplifying field upgrades. Key features include 32 KB of NVSRAM arranged as 32K x 8, full 8051 instruction set compatibility, in-system software download via the on-chip serial port, self-modifying program and data memory, 32 programmable I/O lines, dual data pointers, three 16-bit timer/counters, and a programmable watchdog timer. The integrated lithium energy source is designed to retain memory contents for at least 10 years in the absence of external VCC, eliminating the need for external battery backup or supervisory circuits. From an architectural standpoint, the DS2250-32-16 combines the familiar 8051 core (originally an Intel MCS-51 design) with proprietary nonvolatile SRAM cells on the same substrate. The 40-SIMM module form factor is mechanically equivalent to a JEDEC 30/40-pin SIMM socket, allowing field-replaceable firmware and rapid module swap-out without reworking the flow lines on the host PCB. Power consumption is modest in active mode and drops to a small backup current during NVSRAM retention. Typical applications for the DS2250-32-16 include industrial controllers with field-upgradable firmware, point-of-sale terminals, security and access control panels, dataloggers requiring nonvolatile memory, instrumentation with calibration data stored in NVSRAM, and embedded networking nodes where firmware revision management is critical. The 40-SIMM footprint has no direct surface-mount equivalent on the open market. When designing with this device, ensure the host board exposes a 40-pin SIMM socket with the standard JEDEC pinout. The on-chip serial bootloader uses one of the 8051 UART pins, so the host connector must break those pins out to an external header or RS-232 transceiver. The integrated watchdog should be refreshed in firmware to recover from brown-out events during the lithium-cell backup transition. This page synthesizes distributor pricing, drop-in alternatives within the same DS225x family, and practical design notes not aggregated in the manufacturer datasheet, providing an engineer-ready reference unavailable on DigiKey or Mouser product listings.

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DS2430AP+ - 256-Bit 1-Wire EEPROM, 6-TSOC | Analog Devices
DS2430AP+

DS2430AP+ - 256-Bit 1-Wire EEPROM, 6-TSOC | Analog Devices

The Analog Devices (formerly Maxim Integrated) DS2430AP+ is a 256-bit 1-Wire EEPROM organized as 32 bytes of user memory, housed in a 6-pin TSOC (6-LSOJ) surface-mount package measuring 3.76 mm in width. The device communicates over the Dallas/Maxim 1-Wire bus with a 15 µs time-slot bit rate and operates from 2.8 V to 5.25 V on a single data line plus ground, requiring only one microcontroller port pin for full interface. A 1-Wire EEPROM is a serial non-volatile memory that combines data storage, unique device identification, and power delivery on a single conductor. The DS2430AP+ belongs to the broader category of serial EEPROMs (EEPROM -> non-volatile memory -> memory IC -> semiconductor) and is widely used for board identification, calibration constants, and consumable authentication in embedded systems. Because the protocol also carries parasitic power, designers can mount the part on a PCB with only two pads (data + ground), which dramatically simplifies wiring. Key features include a factory-lasered 64-bit registration number (unique 48-bit serial number, 8-bit CRC, 8-bit family code 14h), 32 x 8-bit user-programmable EEPROM, an additional 64-bit OTP area for permanent write protection, and an on-chip 8-bit CRC generator. The EEPROM cells are rated for a minimum of 100,000 write cycles and 10 years of data retention at +85 °C. The device supports both parasitic-power mode (power harvested from the data line) and external-supply mode for write-heavy applications. The DS2430A family uses a strict master-slave timing protocol. Every bit transaction begins with the master pulling the line low for 15 µs; the slave samples in the middle of the slot. A strong pull-up (typically 2.2 kΩ–4.7 kΩ idle, switched to a few hundred ohms during EEPROM writes) is required in parasitic-power mode to supply the programming current. The on-chip CRC and unique 64-bit ROM ID allow multiple DS2430A devices to coexist on a single bus with guaranteed addressing. Typical applications include PCB identification and asset tracking, printer and consumable cartridge authentication, medical-device calibration storage, industrial sensor calibration constants, battery-pack telemetry tags, and accessory authentication for handheld instruments. Its single-wire interface is ideal when board space, connector pin count, or wiring harness complexity is constrained. When designing with the DS2430AP+, follow the manufacturer's 1-Wire timing guidelines, place the pull-up resistor close to the host pin, and use a strong pull-up during EEPROM write cycles in parasitic mode. Decoupling the data line with a small capacitor can improve noise immunity in long-cable applications. The "+" suffix indicates lead-free, RoHS-compliant packaging on tape and reel. This page synthesizes distributor pricing, drop-in alternatives in the same 6-TSOC package, and practical 1-Wire bus design notes that are not consolidated in the manufacturer datasheet — a useful information gain for engineers evaluating the DS2430AP+ for identification and authentication designs.

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DS2431G+U - 1Kb 1-Wire EEPROM, 2-SFN Package | Analog Devices
DS2431G+U

DS2431G+U - 1Kb 1-Wire EEPROM, 2-SFN Package | Analog Devices

The Analog Devices (formerly Maxim Integrated) DS2431G+U is a 1024-bit, 1-Wire® EEPROM organized as four memory pages of 256 bits each, packaged in a 2-SFN (6.0 mm × 6.0 mm) leadless module. It communicates over a single-contact 1-Wire serial interface, requires only one data line plus ground for power and signaling (parasite-powered), and supports a typical write time of 2 µs to an 8-byte scratchpad before commit to EEPROM. Operating temperature range is -40°C to +85°C (industrial grade). What is a 1-Wire EEPROM? A 1-Wire EEPROM is a non-volatile memory device that uses Maxim's proprietary 1-Wire protocol, which combines power and bidirectional data on a single conductor plus ground. This dramatically simplifies wiring in identification, calibration, and accessory-detect applications by eliminating the multi-pin SPI/I²C bus. The hierarchy is: 1-Wire EEPROM -> serial EEPROM -> non-volatile memory (NVM) -> memory IC -> semiconductor. Each 1-Wire device also carries a unique 64-bit ROM ID, enabling multi-drop addressing on a single bus. Key features of the DS2431G+U include four 256-bit memory pages that can be individually write-protected or put into EPROM-emulation mode (bits can only change from 1 to 0), a unique factory-lasered 64-bit ROM identification number, 8-byte scratchpad for verified write-then-copy operation, and full compatibility with the 1-Wire protocol used throughout the iButton®/1-Wire ecosystem. The 2-SFN package exposes a single DQ data/power contact and a GND paddle, making it ideal for compact PCB pads or solder-down identification tokens. Architecturally, the DS2431 uses an on-chip silicon unique-ID ROM (8-byte family code + 6-byte serial number + 1-byte CRC) generated at wafer probe, plus a four-page EEPROM array accessed through an 8-byte SRAM scratchpad. Writes go through the scratchpad with a built-in 8-bit CRC verification before being copied atomically to the target page, which gives robust data integrity for in-field updates. Typical applications include PCB identification and asset tagging, consumable authentication (ink cartridges, medical disposables, batteries), board-level calibration storage, secure feature enablement, and iButton/1-Wire bus identification nodes. The DS2431G+U is the SFN-packaged member of the broader DS2431 family that also ships in TO-92, TSOC, and TDFN packages. When designing with the DS2431G+U, ensure the DQ line has a strong pull-up (typically 4.7 kΩ to VPU) for both power delivery and open-drain signaling, and reserve host-side firmware for the MATCH ROM / SKIP ROM / WRITE SCRATCHPAD / READ SCRATCHPAD / COPY SCRATCHPAD command sequence. Strong ESD and surge protection on the DQ contact is recommended for connector-exposed applications; the DS2431 family is well documented in Maxim/Analog Devices Application Note 3829. This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the standalone manufacturer datasheet.

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DS2433+ - 4Kb 1-Wire EEPROM TO-92-3 | Maxim Integrated
DS2433+

DS2433+ - 4Kb 1-Wire EEPROM TO-92-3 | Maxim Integrated

The Maxim Integrated DS2433+ is a 4 Kbit (4096-bit) 1-Wire EEPROM organized as sixteen pages of 256 bits (32 bytes) each, packaged in a 3-pin TO-92-3 through-hole form factor. The part derives all read and write power directly from the 1-Wire communication line, requiring no external supply, and integrates a factory-lasered 64-bit registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit family code (23h) for absolute device identification on a multi-drop bus. What is a 1-Wire EEPROM? A 1-Wire EEPROM is a non-volatile memory device that communicates over a single data/power line using Maxim's proprietary 1-Wire protocol. Unlike I2C or SPI EEPROMs that require multiple signals, 1-Wire parts halve the wiring harness in identification, calibration, and consumable-tracking applications. Within the broader taxonomy, the DS2433+ sits under: EEPROM -> non-volatile memory -> memory IC -> integrated circuit -> semiconductor. Its single-pin parasitic-power architecture is the defining differentiator versus I2C EEPROMs (24Cxx family) and SPI EEPROMs (25Cxx family). Key features include: 4 Kbit of user-programmable EEPROM, a 256-bit (32-byte) scratchpad for write-buffered transactions, page-write granularity of 32 bytes, ±5 ns overdrive data-rate support, 1-Wire protocol compatibility with the DS1990 family, and an ESD rating of ±4 kV Human Body Model. The on-board 64-bit ROM enables a single microcontroller GPIO to identify, read, and write multiple DS2433+ devices on a multidrop bus. Technically, the DS2433+ uses a silicon-level serial number burned at wafer test for traceability. Its strict 1-Wire reset/presence/Read-ROM/Match-ROM/Skip-ROM command set follows the iButton standard, allowing the part to coexist with DS18B20 temperature sensors, DS2401 serial-number chips, and DS1990 ROMs on the same wire. Write cycles commit a full 32-byte page in approximately 10 ms. Typical applications include PCB identification and asset tagging, consumable authentication (printer cartridges, medical disposables), board-level calibration data storage, iButton accessories, and standalone serial-number registration for FPGAs or microcontrollers lacking on-board unique IDs. The 3-pin TO-92 through-hole package makes it ideal for products that must be hand-inserted or panel-mounted with a mechanical lanyard, since the package doubles as an electrical contact point. When designing with the DS2433+, reserve a 4.7 kΩ pull-up on the DQ line and add a 1N914 or equivalent ESD diode to GND for transient suppression in industrial environments. Use the part's CRC to validate read integrity and always issue a Skip ROM or Match ROM command before scratchpad writes to avoid address collisions. This page synthesizes distributor pricing as of 2026-10-07, drop-in compatible alternatives (DS24B33+, DS2431, DS1971), and practical 1-Wire design notes not consolidated on the manufacturer's product page.

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DS2450S - 16-Bit 1-Wire Quad ADC | Maxim Integrated | SOIC-8
DS2450S

DS2450S - 16-Bit 1-Wire Quad ADC | Maxim Integrated | SOIC-8

The Maxim Integrated DS2450S is a 16-bit, four-channel successive-approximation analog-to-digital converter that communicates over the Dallas Semiconductor 1-Wire bus. Each of the four high-impedance analog inputs has its own register set for input range, resolution, and alarm threshold configuration, and the device supports both 2.56V and 5.12V input ranges with resolutions up to 16 bits. Housed in an 8-pin SOIC package, the DS2450S draws only 2.5 mW in active conversion and 25 µW in idle mode, making it well suited for parasitic-power sensing nodes. A 1-Wire ADC combines the functions of an analog-to-digital converter with a single-wire serial interface. The 1-Wire protocol is a proprietary Dallas/Maxim bus standard that uses a single bidirectional data line (plus ground return) to carry both power and communication, allowing multiple devices to share one master GPIO pin. The DS2450S is part of the broader ADC family (successive-approximation ADC -> ADC -> data converter -> mixed-signal IC) and is uniquely positioned at the sensing edge of distributed 1-Wire networks where each node needs local analog measurement. Key features include 1-Wire parasitic power support (with optional external VCC), four independently configurable analog input channels, user-programmable resolution per channel, hardware alarm thresholds with conditional-search participation, and on-chip SRAM that retains the channel configuration while the device is powered. The DS2450S also exposes a power-on-reset flag so the bus master can detect when channel settings must be restored. The architecture combines a capacitive-charge-distribution SAR core with an input multiplexer and per-channel configuration memory. The 1-Wire engine implements the standard Dallas hierarchical command set (ROM functions, memory functions, conditional search) and provides a 64-bit unique serial number for multi-drop identification. Total conversion time scales with resolution: at 12 bits across four channels, a full sweep takes roughly 4 ms. Typical applications include remote environmental monitoring (temperature, pressure transducer excitation read-back), industrial 4-20 mA loop digitization, building automation sensor nodes, battery monitoring, and any multi-channel analog sensing point that benefits from the 1-Wire bus's wire-count savings. The conditional-search feature allows a master to poll many DS2450S devices simultaneously to detect which ones have crossed an alarm threshold. When designing with the DS2450S, plan bus topology carefully: 1-Wire networks require a strong pull-up during the low-impedance slot, and long cables degrade rise times. Use a 4.7 kΩ pull-up with short stubs, and budget conversion latency per channel when the master polls multiple devices. The DS2450S is in NRND/EOL status, so new designs should evaluate the modern DS2450 or successor 1-Wire ADCs. This page synthesizes distributor pricing, drop-in package equivalents, and practical 1-Wire bus design notes not collated in the manufacturer datasheet, giving procurement and design engineers a faster path from specification to working hardware.

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DS2450S+ - 16-Bit 1-Wire Quad ADC | Analog Devices
DS2450S+

DS2450S+ - 16-Bit 1-Wire Quad ADC | Analog Devices

The Analog Devices DS2450S+ is a 16-bit, 4-channel successive-approximation analog-to-digital converter (ADC) that communicates over the Dallas Semiconductor 1-Wire bus, housed in an 8-pin SOIC (S) package. According to the manufacturer datasheet, the device integrates a four-to-one analog input multiplexer, a SAR ADC core, and per-channel configuration registers for range, resolution, and alarm threshold, allowing it to deliver digitized analog data plus conditional-search participation with a single data line plus ground return. What is a 1-Wire ADC? A 1-Wire ADC combines an analog-to-digital converter with the Maxim/Analog Devices 1-Wire protocol, which carries both power and bidirectional data on a single conductor (plus ground). In the broader component taxonomy, the DS2450 is an ADC -> data converter -> signal conditioning IC -> analog mixed-signal semiconductor. The 1-Wire family's defining feature is that every device has a unique 64-bit ROM ID, enabling multi-drop buses where the host microcontroller can identify and address individual nodes using only one GPIO pin - dramatically simplifying wiring in distributed sensor and identification applications. Key specifications include 16-bit resolution, four analog input channels, software-selectable input ranges (0 to 5.12V, 0 to 2.56V, ±5.12V, ±2.56V when powered, plus 0 to 5.12V VCC-derived ranges when parasitically powered), per-channel 8-bit offset and 8-bit gain calibration, and 4 ms total conversion time for four 12-bit conversions in sequence. Configuration, calibration constants, and alarm thresholds are stored in on-chip SRAM that can be made non-volatile by an external EEPROM commit step. The architecture combines an internal bandgap reference, a successive-approximation register driven by a self-contained clock, a four-channel analog multiplexer, and the 1-Wire protocol engine with 64-bit ROM ID. Because the device can be powered either from the 1-Wire bus (parasitic power) or from an external VCC, host systems can place the DS2450 at remote locations without running a dedicated power wire. The 1-Wire physical layer uses an open-drain pull-up with either internal or external strong pull-up to support A/D conversion currents. Typical applications include remote analog sensing over a single data line (temperature, pressure, light, voltage monitoring at the edge of a 1-Wire network), building automation and HVAC sensor nodes, industrial control point-of-measurement, battery monitoring in distributed systems, and identification/condition monitoring of field equipment. The conditional-search feature lets the bus master detect channel over/under threshold events without polling every channel, a substantial bandwidth advantage on multi-drop buses. When designing with the DS2450, remember that the 1-Wire bus requires a 4.7 kΩ pull-up to VCC and that parasite-powered operation demands a strong pull-up during the A/D conversion window. Decouple VCC with at least 100 nF close to the pin, keep analog input traces short, and use the read scratchpad / write scratchpad command sequence to commit calibration and alarm values to the device's non-volatile memory. This page combines distributor pricing, drop-in alternatives, and practical design guidance beyond what the manufacturer datasheet alone provides, optimized for engineers evaluating the DS2450S+ for new designs and supply-chain recovery.

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DS2450S+T&R - Quad 1-Wire 16-Bit ADC | Analog Devices
DS2450S+T&R

DS2450S+T&R - Quad 1-Wire 16-Bit ADC | Analog Devices

The Analog Devices (formerly Maxim Integrated) DS2450S+T&R is a quad-channel, 16-bit, successive-approximation analog-to-digital converter (SAR ADC) that communicates over the Maxim 1-Wire bus. It provides four high-impedance analog input channels for measuring voltages over a single digital data line plus ground return, eliminating the need for a dedicated multi-wire ADC interface. The device integrates user-programmable input ranges (2.56 V or 5.12 V), user-programmable resolution (1 to 16 bits) and per-channel alarm thresholds. The +T&R suffix designates the 8-pin SOIC package supplied on tape-and-reel for high-volume SMT assembly. The DS2450 is the most widely deployed ADC in the Maxim 1-Wire converter family. A 1-Wire ADC is a converter whose digital serial interface uses a single data line (plus ground) defined by Dallas Semiconductor (now part of Analog Devices), enabling multiple devices to share a common bus with unique 64-bit ROM IDs. The DS2450 is therefore typically used in applications where a small number of analog signals must be read remotely with minimum wiring, replacing parallel ADCs that would otherwise require several dedicated I/O lines or an SPI/I2C bus. Key features include four analog inputs with switchable input ranges (2.56 V and 5.12 V full scale), 1 to 16 bits of programmable resolution (with conversion time scaling accordingly), per-channel high/low alarm thresholds with conditional-search support, and on-chip SRAM that retains user settings while VCC or the 1-Wire data line is powered. A built-in multidrop controller allows multiple DS2450s to be identified and operated on a common 1-Wire bus, and each device responds to the 1-Wire Conditional Search command when an alarm condition is met. The DS2450 uses a successive-approximation register (SAR) architecture with a capacitive-charge redistribution DAC, achieving 16-bit resolution with no pipeline latency. Power-on reset and a power-on reset flag signal the bus master to restore the device settings stored in SRAM after supply or parasite-power interruptions, ensuring deterministic behavior in noisy industrial environments. Typical applications include remote temperature and analog voltage monitoring over long cable runs, building-automation sensors, industrial process monitoring (4-20 mA loop digitization), environmental monitoring stations, HVAC sensor networks, and any distributed measurement node where minimizing wiring is critical. Each ADC is uniquely addressable on the bus, simplifying node inventory and remote firmware updates. When designing with the DS2450, ensure the 1-Wire bus is properly terminated per Maxim application guidance, with a 4.7 kohm pull-up to VCC (typically 5 V) on the DQ line. Strong pull-up during conversion timeouts is recommended for parasite-powered nodes. Note that the DS2450 is in NRND (Not Recommended for New Designs) status per the manufacturer lifecycle policy - design engineers should verify long-term availability or consider migration paths for new designs. This page synthesizes distributor pricing, lifecycle status, drop-in alternatives and practical design guidance not consolidated in the manufacturer datasheet, providing an actionable summary for procurement and design engineers.

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DS2482S-800+T&R - 8-Channel 1-Wire Master | Maxim Integrated
DS2482S-800+T&R

DS2482S-800+T&R - 8-Channel 1-Wire Master | Maxim Integrated

The Maxim Integrated DS2482S-800+T&R is an 8-channel I2C-to-1-Wire bridge device that interfaces directly to standard (100 kHz max) or fast (400 kHz max) I2C masters to perform bi-directional protocol conversion between the I2C master and any downstream 1-Wire slave devices, housed in a 16-pin SO (SOIC-Narrow-16) package supplied on a 2,500-piece tape-and-reel. An I2C-to-1-Wire bridge is a specialized protocol converter IC that sits between a microcontroller's I2C bus and one or more 1-Wire slave peripherals (such as DS18B20 temperature sensors, DS2401 serial numbers, or iButtons). It offloads the strict 1-Wire timing requirements - including the reset/presence pulse sequence, byte-level time slots, and strong pull-up timing - from the host MCU, allowing the host to communicate with 1-Wire devices through simple I2C register reads and writes. The DS2482S-800 variant specifically integrates eight independent 1-Wire I/O channels, enabling a single bridge to manage up to eight separate 1-Wire buses, which is critical in systems that need isolated sensor networks. Key features include an operating supply voltage of 2.9 V to 5.5 V, internal factory-trimmed timers that relieve the host processor of timing-critical tasks, three binary address inputs that resolve I2C slave-address conflicts, and built-in weak pull-ups to support 1-Wire parasitic-power devices. The device is rated for an operating temperature range of -40 C to +85 C, making it suitable for industrial environments. The DS2482S-800 uses an I2C slave interface with selectable addresses (0x18-0x1F) and exposes each 1-Wire channel through independent IO pins (IO0-IO7). An internal active pull-up handles the strong pull-up required for parasite-powered 1-Wire devices during temperature conversion or EEPROM writes, while per-channel slew-rate control and software-controlled 1-Wire timing parameters ensure signal integrity across varying bus lengths. Typical applications include multi-channel DS18B20 temperature monitoring in HVAC, server farm, and industrial-process-control systems; building-automation sensor networks; and any embedded design that needs to read multiple 1-Wire devices without dedicating a full GPIO port to bit-banging the 1-Wire protocol. When designing with this device, note that each 1-Wire channel needs a decoupling capacitor close to its IOx pin and a 4.7 kohm pull-up to VDD. Unused IOx pins may be left floating because internal pull-ups hold them high. The I2C address is set by the AD0/AD1/AD2 pins and must match the host firmware configuration. This page synthesizes distributor pricing, same-family alternatives, and practical design notes not found in the manufacturer datasheet.

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DS2484Q+T - 1-Wire Master I2C Bridge 8-TDFN | Maxim Integrated
DS2484Q+T

DS2484Q+T - 1-Wire Master I2C Bridge 8-TDFN | Maxim Integrated

The Maxim Integrated DS2484Q+T is a single-channel 1-Wire® master device that performs I2C-to-1-Wire protocol conversion in an 8-pin TDFN (2 mm x 3 mm) package. It operates from 1.71 V to 5.25 V supply voltage and bridges standard (100 kHz max) or fast-mode (400 kHz max) I2C masters to downstream 1-Wire slave devices, presenting itself as the 1-Wire master to any attached slave. Internal user-adjustable timers relieve the host processor from generating time-critical 1-Wire waveforms such as reset, presence-detect, read/write time slots and strong pullup. What is a 1-Wire bridge? A 1-Wire bridge is a type of protocol conversion IC that maps a generic serial bus (here, I2C) to Maxim's proprietary 1-Wire single-wire half-duplex protocol used by devices such as iButtons, temperature sensors (DS18B20), battery monitors (DS2781), and EEPROMs (DS1990/DS2431). In the broader hierarchy, the DS2484 sits at: protocol bridge → interface IC → signal conditioning IC → integrated circuit, eliminating the software bit-banging overhead normally required of the host MCU while improving timing margins and 1-Wire signal integrity through active pullup drive. Key features include an integrated 1-Wire strong-pullup switch capable of delivering up to 20 mA to power parasite-powered 1-Wire slaves, ±5 kV HBM ESD protection on the 1-Wire I/O line, a hardware adjustable slew rate for the 1-Wire output, sleep-mode current of less than 1 µA, and an open-drain active-low OUT output that mirrors the 1-Wire line state to the host. The I2C address is fixed at 0x30 and is selectable via the AD0 pin for use of up to two devices on the same bus. At the architecture level the DS2484 pairs a finite-state-machine-driven 1-Wire master engine with an I2C slave controller and on-chip timing reference, allowing deterministic reset / presence / read / write command sequencing without host MCU overhead. The 2x3 TDFN with exposed pad keeps the RθJA low enough for hot environments, and a selectable CRC enable bit provides automatic CRC16 generation for the 1-Wire ROM command sequence. Typical applications include IoT sensor hubs and edge nodes driving multiple DS18B20 temperature sensors, multi-tenant access control with iButton DS1990 readers, asset-tracking reference designs using DS2431 serial number ICs, and secure-print-cartridge / medical-identification authentication with Crypto-iButton or SHA-1 secure slaves. Battery-powered coin-cell designs benefit from the device's sub-1 µA sleep current. When designing with this part, pay attention to the strong-pullup timing window after a Convert-T command; supplying a 4.7 kΩ external pull-up to a regulated rail rather than the 1-Wire line preserves the on-chip switch for energizing the slave in parasite-power mode. Decouple VDD with a 100 nF ceramic placed within 2 mm of pin 5. This page synthesizes distributor pricing, pin-compatible Maxim Integrated alternatives, and practical design notes not consolidated on any single manufacturer page.

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DS2484R+T - I2C-to-1-Wire Bridge, SOT-23-6 | Analog Devices
DS2484R+T

DS2484R+T - I2C-to-1-Wire Bridge, SOT-23-6 | Analog Devices

The Analog Devices (formerly Maxim Integrated) DS2484R+T is a single-channel I2C-to-1-Wire bridge device that performs protocol conversion between an I2C host and any downstream 1-Wire slave. It is housed in a 6-pin SOT-23 (R) package and operates from 1.71V to 5.25V on both I2C and 1-Wire rails, supporting standard (100kHz max) and fast (400kHz max) I2C communication plus standard and overdrive 1-Wire speeds. What is an I2C-to-1-Wire bridge? An I2C-to-1-Wire bridge is a protocol-conversion integrated circuit that lets a host microcontroller (which natively speaks I2C) communicate with one or more 1-Wire slave devices such as iButtons, temperature sensors, battery ID monitors, and secure authenticators. The bridge sits between the I2C bus and the 1-Wire bus, generating precise reset, presence-detect, read-time-slot, and write-time-slot waveforms so the host only needs to issue high-level commands over I2C. In the power-management and analog-IC taxonomy, this is an interface bridge IC under the broader category of communication-bus bridges. Key features of the DS2484R+T include user-adjustable 1-Wire timing for tRSTL, tMSP, tW0L, and tREC parameters via I2C configuration, internal strong pull-up (active pull-up) support to power high-current 1-Wire slaves during EEPROM writes or temperature conversions, and a low-power sleep mode. The device integrates a 1.8V ±5% and 3.3V ±5% operating point that matches modern low-voltage microcontrollers. The 6-pin SOT-23 footprint makes it one of the smallest I2C-to-1-Wire bridges available. Technically, the DS2484 exposes a register-based command set over I2C that lets the host set the 1-Wire line low, read bit, write byte, perform reset, and read ROM ID without bit-banging. Internal timers offload the strict 1-Wire timing requirements from software, which is essential because 1-Wire timing is notoriously microcontroller-unfriendly. The integrated active pull-up automatically engages for the duration of a slave EEPROM write or temperature conversion. Typical applications include battery-pack authentication with Maxim DS2431/DS28E15/DS28EC20 secure authenticators, multi-node temperature monitoring chains using DS18B20 or DS1922 sensors, iButton reader accessories, and any low-pin-count MCU design that needs 1-Wire access without dedicating a GPIO bit. When designing with this part, observe the recommended 1-Wire pull-up resistor (typically 2.2kΩ for standard speed) and add a 100nF decoupling capacitor adjacent to VDD. Use the ADI evaluation kit (DS2484EVKIT) to accelerate firmware bring-up; the EV kit includes a mounted DS2484R+T, RJ11 connector, and downloadable PC software. This page synthesizes distributor pricing, drop-in alternative candidates, and practical design notes not consolidated on a single vendor product page.

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