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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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DS24B33+ - 4Kb 1-Wire EEPROM, TO-92 | Analog Devices
DS24B33+

DS24B33+ - 4Kb 1-Wire EEPROM, TO-92 | Analog Devices

The Analog Devices / Maxim Integrated DS24B33+ is a 4096-bit (4 Kbit) 1-Wire® EEPROM organized as 16 memory pages of 256 bits each, packaged in a 3-pin TO-92 through-hole form factor. The device communicates over a single-conductor 1-Wire bus following the standard 1-Wire protocol, with each device carrying a factory-programmed, unalterable unique 64-bit registration number for multidrop addressing. A 1-Wire EEPROM is a non-volatile memory device that combines data storage with a one-wire serial communication interface pioneered by Dallas Semiconductor (now part of Analog Devices). Unlike I²C or SPI EEPROMs that require two or four signal lines, 1-Wire parts use only a single data line plus ground, allowing power and data to share the same conductor via parasitic power. Within the broader memory hierarchy, the DS24B33 sits in the EEPROM family (electrically erasable programmable read-only memory), which is a subset of non-volatile memory (NVM) and ultimately semiconductor memory ICs. Key features include 200K write/erase cycle endurance per page, a 32-byte scratchpad for verified data transfer, sixteen 32-byte pages of EEPROM, an on-chip CRC-16 generator for data transfer validation, and an operating voltage range of 2.8V to 5.25V. Data writes are protected by a strict read/write protocol that verifies the scratchpad contents against the master before committing to EEPROM, eliminating partial-write corruption. The DS24B33 is software- and pin-compatible with the legacy DS2433, providing a modern silicon replacement that uses newer semiconductor technology. The TO-92-3 package supports hand-up (uidance-style hand-solderable) installation in low-volume and field-deployed applications where surface-mount is impractical, such as outdoor sensor enclosures, automotive wiring harnesses, and access control tokens. Typical applications include PCB identification and authentication, consumable authentication (ink cartridges, medical sensors), access control iRODs (ibutton ID rings), environmental sensor calibration storage, inventory tracking, and iButton (button-style ID) accessories. The unique 64-bit ROM registration number enables 1-Wire multidrop networks where many devices share a single bus. A key design consideration is the requirement for a 4.7 kΩ pull-up resistor on the 1-Wire data line, plus proper ESD protection. For long cable runs, the strong pull-up during write/erase cycles and proper ground return are essential for reliable operation. This page synthesizes synthesizer-equipped manufacturer datasheet data, distributor stock, includes, applies, applies, design considerations and practical design notes not found in the manufacturer datasheet alone.

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DS24B33Q+T&R - 4Kb 1-Wire EEPROM, 6-TDFN | Maxim Integrated
DS24B33Q+T&R

DS24B33Q+T&R - 4Kb 1-Wire EEPROM, 6-TDFN | Maxim Integrated

The Maxim Integrated DS24B33Q+T&R is a 4096-bit 1-Wire EEPROM organized as 16 memory pages of 256 bits each, packaged in a 6-pin TDFN (3x3 mm) with exposed thermal pad. The device communicates over a single-conductor 1-Wire bus, supports 2 us typical write cycle, and operates from 3.3V or 5V rails. Each device carries a unique 64-bit factory-programmed registration number that is unalterable, enabling secure node identification on the bus. A 1-Wire EEPROM is a non-volatile memory device that uses Maxim's proprietary single-wire half-duplex protocol, requiring only one data line plus ground for communication and power. The bus topology typically supports multiple devices in parallel and provides parasitic-power capability, which is why 1-Wire parts (EEPROM, temperature sensors, secure authenticators) dominate identification, calibration-token, board-registration, and anti-counterfeiting use cases. Key features of the DS24B33 include 4 Kbit density (16 pages x 256 bits), a 32-byte scratchpad for write verification before commit-to-EEPROM copy, open-drain 1-Wire I/O with internal pull-up equivalent, 40-year data retention typical, and industrial -40C to +85C operating range. The 6-TDFN-EP package provides low-profile 3x3 mm PCB real estate and a thermal pad for stable mass-attach reflow. Internally, the DS24B33 follows the standard 1-Wire state-machine protocol: RESET, presence pulse, ROM/function command, then read/write to the scratchpad and EEPROM array. The 64-bit unique ROM ID is split into 1-byte family code (0x23 for this part), 48-bit serial number, and 8-bit CRC. The device is targeted at consumables authentication, PCB ID tagging, and small-parameter storage in industrial/embedded systems. Typical applications include PCB identification and serialization, consumables authentication (medical, printing, industrial fluids), iButton-style accessory detection, calibration-data storage, and board-revision tracking. The exposed-pad package also supports solder-probe programming during manufacturing test. When designing with the DS24B33, observe the 1-Wire timing budget (reset/presence/slot windows defined by the protocol) and choose the master pull-up strength to satisfy the rise-time spec at the maximum expected bus capacitance. Industrial-grade buses (2+) need a strong pull-up after RESET to deliver adequate recovery time on long stubs.

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DS28E25+ - DeepCover SHA-256 1-Wire Authenticator, 4Kb EEPROM | Analog Devices
DS28E25

DS28E25+ - DeepCover SHA-256 1-Wire Authenticator, 4Kb EEPROM | Analog Devices

The Analog Devices DS28E25+ is a DeepCover secure authenticator that combines a 1-Wire SHA-256 challenge-response engine with 4 Kb of user EEPROM in a 3-pin TO-92 package. The device communicates over Maxim's single-contact 1-Wire bus at standard and overdrive speeds, computes a SHA-256 message authentication code (MAC) from user memory contents, an on-chip secret, the host random challenge, and the 64-bit ROM ID, and operates from a 2.97 V to 3.63 V single supply. The '+' suffix indicates the TO-92 (2-lead variant used with the third pin as the data/GND line) through-hole package with 4 Kb EEPROM. What is a secure authenticator? A secure authenticator is a specialized IC that performs cryptographic challenge-response authentication between an embedded host and a peripheral module, enabling anti-counterfeit verification, firmware integrity checks, and secure provisioning. Secure authenticators belong to the broader category of cryptographic co-processors, which in turn sit under hardware security ICs and, ultimately, the larger family of secure semiconductors. The DS28E25 specifically uses SHA-256 (a NIST-approved FIPS 180-4 hash), placing it at the high end of authentication strength. Key features include hardware SHA-256 acceleration with secret protection, a unique and immutable 64-bit ROM ID for identification, 4 Kb (4096 bits) of user-programmable EEPROM with single-byte write capability, and built-in transient, ESD, and tamper-detection safeguards. The device supports 1-Wire overdrive speed up to 142 kbps, low standby current, and parasitic-power operation directly from the data line. The TO-92 package is well suited to space-constrained peripheral modules such as consumables, sensors, and cable assemblies. Typical applications include medical consumable authentication (e.g., ensuring only qualified test strips or cartridges are used), printer cartridge and battery pack identification, secure firmware or calibration-data binding, and anti-counterfeit protection for industrial sensors, accessories, and connected peripherals. The 1-Wire interface minimizes wiring - often a single data line plus ground - which is ideal for field-installed modules. When designing with the DS28E25, pay close attention to 1-Wire timing parameters and bus pull-up sizing; the device is specified for overdrive speed (max 142 kbps) only when the host controller enforces strict tW0L/tW0H windows. For systems that exceed the 3.63 V maximum, use a DS2480B or DS2481 1-Wire bridge to level-shift. This page consolidates distributor pricing as of 2026-10-07, drop-in alternatives from the same TO-92 family and competitor parts, and practical design notes not found in the manufacturer datasheet alone.

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DS28E25+ - SHA-256 1-Wire Authenticator, 4Kb EEPROM, TO-92 | Analog Devices
DS28E25+

DS28E25+ - SHA-256 1-Wire Authenticator, 4Kb EEPROM, TO-92 | Analog Devices

The Analog Devices DS28E25+ (formerly Maxim Integrated) is a DeepCover secure authenticator that combines a hardware SHA-256 accelerator, a 4096-bit user EEPROM, and a unique 64-bit ROM ID on a single 1-Wire bus in a TO-92 (3-pin) through-hole package. It operates from 2.97 V to 3.63 V on the data/parasite-power line and communicates over the single-contact 1-Wire interface at standard and overdrive speeds, providing strong cryptographic authentication for anti-counterfeiting and peripheral identification. A secure authenticator is a specialized IC category within the broader semiconductor security hierarchy: secure authenticator -> cryptography IC -> security IC -> interface/specialized IC. DeepCover is Analog Devices' portfolio of security ICs that embed cryptographic primitives, physically secure key storage, and active die-level shielding to protect against invasive and non-invasive attacks, addressing system-on-board (SoB) and peripheral-authentication use cases where a software-only root-of-trust is insufficient. Key features include hardware SHA-256 computation over user memory, a 64-bit secret, a host random challenge, and the 64-bit ROM ID; on-chip 4 Kb (512-byte) user EEPROM organized in 32 pages of 16 bytes; 1-Wire overdrive communication up to 76.9 kbps; a unique factory-lasered 64-bit registration number; and write-only/read-only protection modes per page. The TO-92 package is chosen for cable-mounted peripherals (medical sensors, printer cartridges, e-meter modules) where the authenticator is soldered or clipped onto a flying lead and survives harsh mechanical environments. Architecturally, the DS28E25 isolates the secret in a protected memory block that participates in the SHA-256 hash but is never exposed on the bus. Host-side verification reads the public EEPROM, generates a random challenge, computes SHA-256 in firmware, and compares the result with the device-returned MAC - a strong two-factor scheme where knowledge of the secret alone cannot impersonate the device without the physical silicon. Typical applications include medical sensor authentication (single-use disposable probes), printer and consumable cartridge identification, industrial control module anti-counterfeiting, e-meter tamper detection, and IoT node provisioning. In each case the DS28E25+ provides a hardware root-of-trust that is impractical to clone. When designing with this part, place a strong pull-up (typically 4.7 kohm to VPUP, the 1-Wire pull-up rail) on the data line, observe the VPUP range of 2.97 V to 3.63 V during reads and EEPROM writes, and verify parasitic-power budgeting during long EEPROM-programming intervals where current can reach several milliamps. Decoupling on the VPUP rail with a 0.01 uF to 0.1 uF ceramic capacitor close to the device improves write reliability. This page synthesizes distributor pricing, drop-in alternatives from the same product family and competitor equivalents, and practical design notes not found in the manufacturer datasheet.

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DS28E25G+T - 1-Wire SHA-256 Authenticator, 4Kb EEPROM | ADI
DS28E25G+T

DS28E25G+T - 1-Wire SHA-256 Authenticator, 4Kb EEPROM | ADI

The Analog Devices / Maxim Integrated DS28E25G+T is a 1-Wire SHA-256 secure authenticator with 4 Kb (512 bytes) of user EEPROM, housed in a 6-pin TDFN-EP (2-SFN, 6x6 mm) package. It combines crypto-strong bidirectional challenge-and-response authentication based on the FIPS 180-3 Secure Hash Algorithm with 4 Kbits of general-purpose user memory and a unique 64-bit ROM ID. The IC operates from a single 1-Wire data line plus parasitic or local power (2.97 V to 3.63 V) and supports overdrive communication at 142 kbps. What is a 1-Wire Secure Authenticator? It is a type of cryptographic security IC that protects embedded systems against counterfeiting, cloning, and unauthorized reflow. The category sits inside the broader hierarchy of secure authentication IC -> cryptographic processor -> secure element -> embedded security. ADI's DeepCover family layers physical tamper resistance on top of standard cryptography to shield secret keys from side-channel attacks. The DS28E25 belongs to the DeepCover embedded security family and is a member of the DS28E2x SHA-256 secure-authenticator family, differentiated by EEPROM size and feature set. Key features include a hardware SHA-256 engine, a 256-bit secret key, a unique 64-bit lasered ROM ID per device, 4 Kbits (512 bytes) of user EEPROM organized as sixteen 32-byte pages, an additional 8-byte secure memory area, GPIO with selectable logic levels, and a decrement-only counter. Authentication runs in less than 5 ms at the standard 1-Wire speed of 15.4 kbps, enabling fast production-line verification. Operating temperature range is -40 °C to +85 °C, and quiescent current is approximately 1 µA in sleep mode. Typical applications include medical sensor authentication to prevent counterfeit disposables, battery-pack authentication for power tools and e-bikes, printer cartridge identification, industrial control module authentication, and accessory/peripheral authentication for IoT endpoints. Designers use the DS28E25 to add a cryptographic "finger-print" to consumables and field-replaceable modules so that host firmware can refuse to operate with unauthorized replacements. When designing with this device, follow ADI reference schematic DS28E25-Schematic and observe 1-Wire pull-up sizing on the data line: 1 kΩ to 5 kΩ typical at standard speed, dropping to a few hundred ohms for overdrive. Place the strong pull-up MOSFET near the device when using parasite power; an external 3.3 V supply simplifies designs above 25 °C ambient. This page synthesizes distributor pricing, drop-in alternatives from the DS28E2x family, and practical design notes that go beyond the manufacturer datasheet to help hardware engineers shorten their BOM validation cycle.

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DS28E25P+T - 1-Wire SHA-256 Authenticator, 4Kb EEPROM, TSOC-6
DS28E25P+T

DS28E25P+T - 1-Wire SHA-256 Authenticator, 4Kb EEPROM, TSOC-6

The Analog Devices / Maxim Integrated DS28E25P+T is a DeepCover Secure Authenticator that combines a FIPS 180-3-compliant SHA-256 cryptographic engine with 4 Kbits (512 bytes) of user EEPROM in a 6-pin TSOC package. Housed in the compact 6-TSOC (0.148", 3.76 mm width) surface-mount package, the DS28E25P+T communicates over a single-wire Maxim 1-Wire bus and operates from a 3.0 V to 3.6 V single supply while parasitically drawing power from the data line when required. The "+T" suffix denotes tape-and-reel packaging. What is a Secure Authenticator? A secure authenticator is a specialized IC that stores a secret key in protected memory and performs a cryptographic challenge-response handshake with a host controller, allowing the host to verify that a peripheral (sensor, battery, accessory, or consumable) is genuine before granting access, transferring data, or activating functionality. Within the broader taxonomy, the DS28E25 sits in the hierarchy: secure authenticator -> authentication IC -> security IC -> semiconductor. Its DeepCover family designation indicates multilayer physical security protecting the on-chip secret key from invasive and non-invasive attack. The DS28E25 implements bidirectional SHA-256 challenge-and-response authentication using a 256-bit secret and a unique 64-bit ROM ID that is factory-lasered into each die. The device integrates an on-die SHA-256 accelerator and a 4 Kbit (512-byte) user EEPROM array partitioned into four 128-byte pages, with each page lockable to support write-protect-once, write-protect-permanently, and OTP/secret modes. Operating temperature spans -40 C to +85 C (industrial grade), and the part is rated for a typical 1-Wire pull-up of 2.2 kohm with strong ESD protection on the IO/data pin. The DS28E25 is widely used to authenticate medical sensors, batteries and chargers, printer cartridges, industrial sensors, and any peripheral whose authenticity directly affects safety, IP protection, or revenue. By placing an inexpensive DS28E25 on a consumable or accessory and storing a unique secret in its EEPROM, OEMs can deter cloning and gray-market substitution. Compared with software-only authentication, the DS28E25 places the secret inside a tamper-resistant IC, making key extraction materially harder. When laying out the PCB, keep the DQ/IO trace short and place a single 2.2 kohm pull-up to the host-side 1-Wire rail; avoid stubs and long parallel runs to other digital lines. Ensure the host GPIO used for the 1-Wire bus is open-drain capable, and budget for the 1-Wire reset/presence pulse timing as specified in the datasheet timing section.

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DS28E25Q+U - 1-Wire SHA-256 Secure Authenticator | Analog Devices
DS28E25Q+U

DS28E25Q+U - 1-Wire SHA-256 Secure Authenticator | Analog Devices

The Analog Devices / Maxim Integrated DS28E25Q+U is a DeepCover secure authenticator that combines crypto-strong bidirectional SHA-256 challenge-and-response authentication with 4 Kb of user EEPROM, packaged in a 6-pin TDFN (3x3 mm) form factor. Operating from 2.97 V to 3.63 V, it communicates over the proprietary 1-Wire bus using Maxim's FIPS 180-3-compliant SHA-256 engine and provides a 64-bit unique ROM ID plus a separate secret used to derive per-session HMAC-SHA256 signatures. What is a secure authenticator? A secure authenticator is a specialized IC that proves the authenticity of a peripheral, accessory, consumable, or sensor to a host processor using a hardware-stored cryptographic key that is never exposed on the bus. Authenticators sit beneath cryptographic coprocessors, secure elements, and Trusted Platform Modules in the security-IC hierarchy; they are typically the lowest-cost and smallest-footprint option for hardware-based anti-counterfeiting in resource-constrained nodes such as printer cartridges, medical sensors, and IoT accessories. Key features of the DS28E25Q+U include SHA-256 challenge-and-response authentication, 4 Kb (512 bytes) of user EEPROM organized as sixteen 32-byte pages, an increment-only counter for monotonic anti-rollback usage tracking, a programmable GPIO with optional authentication-gated control, and on-chip 1-Wire parasitic-power support that allows the device to draw operating current from the data line when an external supply is not present. Each device ships with a factory-programmed 64-bit registration number that is guaranteed unique and is used as the address on the 1-Wire bus. The DS28E25Q+U leverages Analog Devices' DeepCover physical-security techniques, including active die shielding, cryptographic key generation on-chip, and storage of the master secret in non-readable memory that resists both invasive and non-invasive attack vectors. A 1-Wire front-end reduces the host-side pin count to a single data line plus ground, simplifying board layout in dense systems where GPIO is scarce. Typical applications include printer cartridge authentication and refill detection, IoT sensor/peripheral pairing and anti-counterfeiting, medical device accessory identification and calibration data storage, secure feature setting for configurable systems, license management, and intellectual property protection. Designers pair the DS28E25Q+U with a host MCU or SoC running Maxim's DS2465 or DS2480B 1-Wire bridge. When designing with the DS28E25Q+U, place a low-ESR decoupling capacitor close to the VCC pin when parasitic power is not used, and observe Maxim's 1-Wire timing guidelines to maintain bus integrity across cable lengths up to 100 m. Designers should also evaluate the optional GPIO mode early - using authentication to gate a power rail or enable signal removes the need for a separate secure load switch. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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DS28EC20+ - 20Kb 1-Wire EEPROM, TO-92-3 | Analog Devices
DS28EC20+

DS28EC20+ - 20Kb 1-Wire EEPROM, TO-92-3 | Analog Devices

The Analog Devices DS28EC20+ is a 20480-bit (20 Kbit) 1-Wire EEPROM organized as 80 memory pages of 256 bits each, plus an additional 256-bit page reserved for control functions, and is delivered in a TO-92-3 through-hole package. It communicates over a single-contact 1-Wire interface at a standard speed of up to 15.4 kbps or an overdrive speed of up to 90 kbps, with the host supplying power parasitically through the same data line. According to the manufacturer datasheet (Revision 10), data is written via a 32-byte scratchpad, verified with a read-back, and finally copied to the EEPROM array, providing strong write-cycle integrity for embedded logging. A 1-Wire EEPROM is a serial non-volatile memory that combines data storage and communication on a single conductor plus ground, allowing multiple parts to share one bus and to be identified by a unique 64-bit ROM ID. The DS28EC20 belongs to the EEPROM -> non-volatile memory -> memory IC hierarchy within the broader semiconductor category, and it is one of the largest-density single-contact serial EEPROMs in the 1-Wire family, second only to higher-density siblings like the DS28CM00. Key features include a wide operating range from 2.8 V to 5.25 V on VPUP, an operating temperature of -40 °C to +85 °C, a write endurance of 200k cycles per door, and over 40 years of data retention. The DS28EC20 also provides a high degree of backward compatibility with the legacy DS2433, requiring only a lengthening of tPROG from 5 ms to 10 ms, making it a popular migration target for retrofit designs that need more memory than 4 Kbit-class 1-Wire parts can offer. The TO-92-3 footprint suits through-hole PCB assemblies and probe-style mechanical enclosures. The DS28EC20 uses a single-pin CMOS interface with internal parasitic-power charge-pump storage. The overdrive mode (4–5.25 V VPUP) enables faster factory programming and high-throughput identification, while standard mode supports long cable runs up to several meters. Its unique 64-bit ROM address and robust CRC-16 allow reliable device selection on a multidrop bus, simplifying firmware that needs to identify, authenticate, or store calibration data on a per-module basis. Typical applications include per-board identification and traceability in industrial control modules, calibration and configuration storage in sensor assemblies, accessory authentication in medical and test equipment, firmware/license key storage in embedded systems, and tamper-evident parameter logging in metering devices. The 20 Kbit capacity is sufficient for storing calibration curves, user settings, audit logs, or small lookup blocks. When migrating from DS2433 (4 Kbit) or DS2431 (1 Kbit), the DS28EC20 is a 5x-20x density upgrade on the same 1-Wire protocol. A key design tip is to add a 2.2 kΩ pull-up resistor on the 1-Wire data line to a regulated 3.3 V or 5 V rail (VPUP), and ensure your CRC-16 routine matches the device-generated polynomial so that multidrop bus contention is detected reliably. This page synthesizes distributor pricing, same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving procurement and design engineers an at-a-glance engineering reference for the DS28EC20+.

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DS28EC20+T - 20Kb 1-Wire EEPROM, TO-92-3 | Analog Devices
DS28EC20+T

DS28EC20+T - 20Kb 1-Wire EEPROM, TO-92-3 | Analog Devices

The Analog Devices (Maxim Integrated) DS28EC20+T is a 20480-bit (20Kb) 1-Wire EEPROM organized as 80 memory pages of 256 bits each, with an additional page reserved for control functions, and is housed in a 3-pin TO-92-3 through-hole package. It communicates over the single-conductor Dallas Semiconductor 1-Wire bus, follows the standard 1-Wire protocol, and each device carries its own factory-lasered, unalterable 64-bit ROM registration number that allows it to be individually addressed on a multidrop 1-Wire net. An EEPROM (Electrically Erasable Programmable Read-Only Memory) is a type of non-volatile memory that retains data when power is removed and supports byte-level or page-level electrical erase and rewrite cycles. The DS28EC20 belongs to the EEPROM > non-volatile memory > memory IC > integrated circuit taxonomy. Data is written to a 32-byte scratchpad, verified by reading it back, and then committed to the EEPROM array - this scratch-and-copy flow gives the DS28EC20 strong write-verify integrity even though it shares a single wire with power and data. Key features of the DS28EC20+T include a 20Kb (2.5KB) user-accessible array with 256-bit page granularity for efficient block writes, parasite power operation (the device harvests operating power directly from the 1-Wire data line), an internal CRC16 generator on the 64-bit ROM and on scratchpad reads for robust error detection, and a unique per-device serial number that doubles as a node address on a multidrop bus. The 1-Wire interface requires only a single data line plus ground, simplifying cable runs for remote or sensor-mounted identification nodes. Architecturally the DS28EC20 combines a CMOS EEPROM array with a 1-Wire front end and a hard-wired 64-bit serial number. The CMOS process yields low active and standby current budgets that match the modest energy available from the 1-Wire pull-up, while the dedicated scratchpad decouples host-side write latency from EEPROM programming time. The TO-92-3 package matches the legacy Dallas Semiconductor form factor, allowing direct mechanical and pin-compatibility upgrades of older 1-Wire EEPROM designs. Typical applications include electronic accessory and consumable identification, board serialization and anti-counterfeiting, building automation node addressing, industrial sensor tagging, and any multidrop 1-Wire network where each node must carry its own unique identifier plus user-writable storage. Because the device powers itself from the data line, no local supply rail is required at the node. When designing with the DS28EC20+T, observe strict 1-Wire timing: the host must provide a strong pull-up to 5V (or 3.3V in low-voltage mode), respect t_RSTL/t_RSTH/t_PDL/t_PDH reset and presence timing windows, and verify each scratchpad write with a CRC16 match before issuing the Copy & Lock command. Note that the internal ROM copy-lock mechanism is one-time per page, so plan page allocation before programming the lock state. The TO-92 leads should be clipped or potted when used in mechanically exposed installations. This page synthesizes distributor pricing from DigiKey, Mouser and LCSC, pin-compatible 1-Wire EEPROM alternatives, and practical 1-Wire bus design notes not found in the bare manufacturer datasheet, providing an engineer-grade reference for sourcing and applying the DS28EC20+T.

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DS28EC20P+ - 20Kb 1-Wire EEPROM | Analog Devices | TSOC-6
DS28EC20P+

DS28EC20P+ - 20Kb 1-Wire EEPROM | Analog Devices | TSOC-6

The Analog Devices (formerly Maxim Integrated) DS28EC20P+ is a 20-Kbit (20480-bit) 1-Wire EEPROM organized as 80 memory pages of 256 bits each, with an additional page reserved for control functions, housed in a 6-pin TSOC surface-mount package. The device operates from a single-contact 1-Wire serial interface that carries both data and parasitic supply, eliminating the need for an external power pin and enabling connection with a single data line plus ground return. A 1-Wire EEPROM is a type of non-volatile serial memory IC that combines data storage and communication over a single conductor using a vendor-specific signaling protocol, falling within the EEPROM memory hierarchy and broader memory product classification. Memories fall within the semiconductor IC hierarchy, which is part of the discrete and integrated semiconductor electronics stack. The 1-Wire interface is widely used in identification, calibration, accessory-authentication, and board-tagging applications because it minimizes wiring and allows multiple devices to share one bus. Key features of the DS28EC20P+ include a 32-byte scratchpad that verifies data before committing to EEPROM, page write capability of up to 32 bytes per write cycle, a unique 64-bit ROM ID for multi-drop bus addressing, an Overdrive mode that raises the bus speed up to 80 MHz equivalent for faster reads, and ESD protection rated per JEDEC HBM on the IO pin. The device derives its operating current parasitically from the 1-Wire line during communication, with the EEPROM page write current supplied from an external reservoir capacitor. The DS28EC20 architecture uses an addressable-cell decoder with a precision charge pump to program the floating-gate EEPROM cells, ensuring 200K write-cycle endurance and greater than 40-year data retention. Its robust ROM-SHA test structure enables 64-bit unique serialization across billions of devices, and the Overdrive Skip ROM command provides backward compatibility with standard-speed 1-Wire hosts when used on a single-drop bus. Typical applications include printed circuit board identification and traceability, sensor calibration data storage, medical device accessory authentication, industrial control module tagging, and consumable authentication in printers or analyzers. The device is designed for new designs per the manufacturer product page and is well-suited for both factory-floor automation and field-deployed equipment. When designing with this part, observe the 1-Wire timing requirements published in the device datasheet, choose a properly sized reservoir capacitor for EEPROM write currents, and consider ESD layout practices on the exposed single data line. The TSOC-6 package supports standard surface-mount reflow while keeping the wire-bond loop compact for reliable 1-Wire signaling. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, and is intended as an engineering decision aid for sourcing and second-source planning.

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DS31408GN+ - 8-Input 14-Output Dual DPLL Timing IC | Microchip
DS31408GN+

DS31408GN+ - 8-Input 14-Output Dual DPLL Timing IC | Microchip

The Microchip DS31408GN+ is a flexible, high-performance timing IC for frequency conversion and frequency synthesis in telecom and networking equipment, housed in a 256-pin CSBGA package (17x17 mm). It features 8 input clocks and 14 output clocks, each capable of accepting or generating nearly any frequency between 2 kHz and 750 MHz, with sub-ps output jitter and integrated 1588 clock support. A DPLL (Digital Phase-Locked Loop) timing IC is a high-precision frequency synthesis and jitter-cleaning device used in telecom, Ethernet, and synchronization networks. Within the system hierarchy, a DPLL belongs to the timing IC family, which sits under clock generation, clock distribution, and clock & timing integrated circuits - a critical category in power management and signal chain design where reference clocks, PTP (Precision Time Protocol), and Stratum-compliant timing are required for carrier-grade equipment. Key features of the DS31408GN+ include: a dual DPLL architecture with independent holdover and reference switching, support for Ethernet, SONET/SDH, Stratum 2/3E, and telecom line rates, sub-picosecond output jitter performance, integrated IEEE 1588 hardware support for PTP timestamping, and CMOS/TTL compatible I/O. The device includes on-chip EEPROM for autonomous configuration and supports SPI/I2C host interfaces for in-system programmability. The DS31408GN+ integrates two independent DPLLs, each capable of locking to any of the 8 input references, with programmable bandwidth and fast-lock algorithms that minimize wander during reference switching. Its fractional-N output dividers support virtually any output frequency between 2 kHz and 750 MHz, eliminating the need for multiple discrete timing ICs in multi-protocol line cards. Typical applications include SONET/SDH line cards, Ethernet switches and routers requiring SyncE or PTP synchronization, OTN (Optical Transport Network) equipment, base station synchronization, and Stratum-compliant timing subsystems in carrier-grade infrastructure. The dual-DPLL architecture is particularly valuable in equipment that must hold frequency during a primary reference failure. When designing with this device, provide a low-jitter crystal or TCXO reference at the primary input and observe PCB layout guidelines for mixed-signal clock circuits - keep output traces impedance-controlled and length-matched, and decouple each supply pin with 0.1 uF ceramic capacitors placed as close as possible to the BGA balls. The 256-pin BGA package requires careful fanout and via-in-pad PCB technology for reliable assembly. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping timing engineers select the right configuration of the DS31408 platform for their application.

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DS3231M+ - ±5 ppm I2C Real-Time Clock | Maxim Integrated
DS3231M+

DS3231M+ - ±5 ppm I2C Real-Time Clock | Maxim Integrated

The Maxim Integrated DS3231M+ is a ±5 ppm I2C real-time clock (RTC) with clock and calendar functions, available in a 16-pin SOIC package. It combines a MEMS resonator with a temperature-compensated timekeeping engine, supports a 2.3 V to 5.5 V operating supply range, and maintains timekeeping from a coin-cell battery when the main supply is removed. The DS3231M+ provides a low-cost, highly accurate timebase for embedded systems that need seconds, minutes, hours, calendar date, and alarm functions over an I2C bus. A real-time clock is a clock-and-timing IC that preserves calendar time independently of a system processor. The RTC category sits within integrated timing circuits, where an oscillator and digital timekeeping logic maintain a reference even when the main system is unpowered. The DS3231M+ uses a MEMS resonator rather than a conventional quartz crystal, reducing external components while supporting stable long-term timekeeping. Its integrated temperature compensation is designed to maintain accuracy across changing ambient conditions. The device supports a 400 kHz I2C interface, two programmable alarms, and a square-wave output that can be used for periodic interrupts or clocking-related functions. Register access and real-time data use the familiar BCD date and time format. The DS3231M+ is specified for a 16-pin, 7.50 mm-wide SOIC package, making it suitable for compact embedded boards that use a common 16-pin land pattern. Its internal MEMS resonator eliminates the need for an external crystal, while the integrated digital compensation removes external calibration components. The result is a compact timebase with fewer external components than a discrete crystal-and-capacitor implementation. The device can operate directly from a 3.3 V or 5 V system supply while preserving the calendar through a backup battery. Typical uses include industrial data loggers, environmental monitors, instrumentation, embedded control systems, network appliances, and consumer electronics. It is especially useful when the host microcontroller can be reset or power-cycled but the system must retain wall-clock time. Its I2C interface also allows firmware to obtain time without burdening the host with timing logic. Designers should use suitable pull-up resistors on the I2C bus, connect the backup battery to the designated supply input, and review the oscillator-startup and power-loss behavior in the manufacturer datasheet. PCB placement should keep I2C routing away from high-current switching nodes and noisy sources. For timing-critical systems, validate the complete power, layout, and firmware configuration rather than relying only on nominal RTC accuracy.

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DS3231M+TRL - ±5ppm I2C RTC in 16-SOIC | Analog Devices
DS3231M+TRL

DS3231M+TRL - ±5ppm I2C RTC in 16-SOIC | Analog Devices

The Analog Devices DS3231M+TRL is a low-cost, extremely accurate I2C real-time clock with ±5 ppm accuracy, a 2.3 V to 5.5 V operating range, and a 16-SOIC package. It integrates a MEMS resonator and a battery backup input, allowing accurate timekeeping to continue when the main supply is interrupted. The device registers calendar and clock data over the two-wire I2C interface and includes alarm-capable RTC functionality identified in the verified component data. A real-time clock is a timekeeping integrated circuit that preserves date and time information independently of a system's main processor. The DS3231M belongs to the RTC, clock-and-calendar, timekeeping IC, and power-management semiconductor hierarchy. Unlike a simple oscillator, an RTC maintains structured calendar information and typically includes an I2C host interface so embedded software can read or set the current time. The DS3231M+TRL's headline advantage is its specified ±5 ppm frequency accuracy. The integrated MEMS resonator replaces a discrete quartz crystal while reducing assembly component count. Its 2.3 V to 5.5 V supply range permits operation in both 3.3 V and 5 V systems. A dedicated battery input preserves timekeeping during main-power loss, and the I2C interface connects directly to a host microcontroller or other embedded controller. The 16-SOIC package is specified as WSOIC-16 by one distributor listing, with a listed body width of 7.50 mm. The verified component description identifies the device as an alarm RTC using day, date, month, year, hour, minute, and second date-time formatting. These characteristics make it appropriate for systems where time must remain traceable across power cycles without relying entirely on a network time service. Typical applications include industrial controllers, data-acquisition equipment, embedded instruments, access-control terminals, and compact sensor nodes. In each case, the RTC supplies a local time reference while the system processor performs measurement, control, logging, or communication. Its I2C interface avoids the use of many discrete I/O lines and is especially useful in designs where board area and component count are constrained. Designers should treat the battery path as a power-reliability feature rather than a substitute for a fully specified primary supply. I2C pull-up resistors, bus speed, and address selection must be checked against the host system. Because the exact exposed-pad and pin-level details were not included in the supplied verified data, engineers should confirm the complete land pattern and pin assignment against the manufacturer datasheet before layout release. This page consolidates verified manufacturer and distributor information, supply references, comparison parameters, and practical selection guidance for engineers evaluating the DS3231M+TRL. It also distinguishes directly comparable same-family parts from alternatives that require different packages or functional verification, avoiding unsupported drop-in claims.

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DS3231MZ+ - ±5ppm I2C RTC with TCXO | Maxim Integrated
DS3231MZ+

DS3231MZ+ - ±5ppm I2C RTC with TCXO | Maxim Integrated

The Maxim Integrated DS3231MZ+ is an extremely accurate I2C real-time clock (RTC) with an integrated temperature-compensated MEMS resonator, providing ±5 ppm accuracy over 0°C to +50°C in an 8-pin SOIC (0.154", 3.90 mm width) package. It operates from a 2.3 V to 5.5 V supply and maintains timekeeping through an external backup battery when main power is interrupted. Communication is via a fast 400 kHz I2C (2-wire) serial interface with time/date registers in HH:MM:SS and YY-MM-DD-dd format. Source: Maxim/Analog Devices DS3231M datasheet. A real-time clock (RTC) is a dedicated low-power timing IC that keeps wall-clock time (seconds, minutes, hours, day, date, month, year) independently of the main MCU. It sits in the system hierarchy alongside power management and supervision ICs, between the backup battery and the host processor. Unlike an MCU's internal timer, an RTC continues counting during main power loss, making it the canonical block for data-logger timestamping, scheduled wake-ups, and any application that must remember "when" across power cycles. The DS3231M family specifically replaces a discrete crystal + TCXO with an on-chip MEMS resonator, eliminating PCB crystal layout and trimming steps. Key features include ±5 ppm accuracy (±2.17 minutes/year) without user calibration, integrated MEMS resonator that removes external crystal requirements, automatic backup switching to a battery on VCC loss, two programmable time-of-day alarms, a square-wave output (1 Hz, 1.024 kHz, 4.096 kHz, 8.192 kHz), and an I2C bus rated to 400 kHz fast mode. The 8-SOIC package is pin-compatible with the popular DS1307 footprint family and other 8-pin RTCs. Operating temperature spans the industrial -40°C to +85°C range, and the part consumes roughly 110 µA active and 3 µA in timekeeping mode with VCC removed. The DS3231M uses a silicon MEMS resonator trimmed at the factory, eliminating the need for external load capacitors or PCB crystal layout. An on-chip temperature sensor drives a compensation circuit that adjusts the counter, achieving the ±5 ppm rating without user intervention. Battery-backup mode is transparent to the user: when VCC drops below the battery voltage, an internal switch redirects the supply to the backup source and the oscillator keeps running. Per the manufacturer datasheet, the BB32 pin accepts a 3 V lithium cell (CR2032 typical) and the device draws 3 µA from the battery in timekeeping mode. Typical applications include Arduino/Raspberry Pi data-logger timestamps, IoT sensor nodes that wake on RTC alarm, point-of-sale terminals requiring accurate transaction time, GPS-disciplined wall-clock backup, and industrial controllers with scheduled logging. The 8-SOIC footprint drops onto thousands of existing DS3231 / DS1307 module PCBs, making it the lowest-effort upgrade from generic crystal RTCs. When designing with the DS3231MZ+, place a 0.1 µF decoupling capacitor as close as possible to VCC and a backup battery on the BB32 pin through a decoupling network; ensure the I2C lines (SCL, SDA) are pulled up to VCC with 4.7 kΩ resistors for reliable 400 kHz operation. The INT/SQW pin can be left open or used as an interrupt source for the host MCU. This page synthesizes distributor pricing, drop-in alternatives in the same 8-SOIC package, and practical design notes that go beyond what is found in the manufacturer datasheet alone.

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DS3231MZ+TRL - 5ppm I2C RTC | Maxim Integrated | SOIC-8
DS3231MZ+TRL

DS3231MZ+TRL - 5ppm I2C RTC | Maxim Integrated | SOIC-8

The Maxim Integrated DS3231MZ+TRL is a 5ppm I2C real-time clock and calendar with integrated MEMS resonator technology, supplied in an 8-pin narrow SOIC package measuring 3.90mm wide. It operates from 2.3V to 5.5V over a -40C to +85C temperature range and maintains accurate timekeeping when the main supply is interrupted through its battery input. The device combines a real-time clock, calendar, temperature sensor, and I2C interface in one low-cost integrated circuit. A real-time clock, or RTC, is a clock-and-calendar IC that keeps track of time independently of the system processor. The DS3231M family belongs to the broader timekeeping IC and clock-and-timing semiconductor hierarchy. Its internal MEMS oscillator replaces a conventional crystal resonator, reducing external components and improving manufacturing consistency. The I2C interface allows a host microcontroller or processor to read and write the time, calendar, alarm, and temperature registers through two serial wires. The DS3231MZ+TRL is specified as a 5ppm real-time clock, making it suitable for systems requiring stable wall-clock time across temperature changes. Its low-cost MEMS architecture is useful in embedded products where board space, assembly simplicity, and backup timekeeping matter. The integrated temperature sensor supports calibration-related monitoring and is also used by the device for timekeeping compensation. Because the device includes a battery input, it can continue operating from a backup source when the primary supply is removed. The DS3231M family is commonly used in industrial controllers, embedded instruments, access-control terminals, data-acquisition equipment, and consumer products that need date and time information after power cycling. The I2C interface makes it straightforward to connect to host processors while the internal oscillator removes the need for a separate crystal and most associated load-capacitor design work. The 8-pin SOIC package also supports conventional surface-mount assembly and automated manufacturing. When designing around the DS3231MZ+TRL, verify the exact pin mapping from the manufacturer pin-description table and connect the backup source according to the battery configuration used by the design. Confirm I2C pull-up values, supply sequencing, and decoupling against the device electrical characteristics. Use the device’s alarm, square-wave, and temperature-register functions only when their timing and electrical limits are understood. The manufacturer’s DS3231M product page and the DS3231MZ+TRL technical documentation are the appropriate references for final schematic and layout decisions. This product page combines the manufacturer’s DS3231M family information with verified distributor listings, application-oriented design guidance, and same-package replacement context. It is intended to help engineers evaluate accuracy, backup operation, interface requirements, and board-level implementation before committing a DS3231MZ+TRL to a production design.

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DS3231MZ/V+ - 5ppm I2C RTC in 8-SOIC | Analog Devices
DS3231MZ/V+

DS3231MZ/V+ - 5ppm I2C RTC in 8-SOIC | Analog Devices

The Analog Devices DS3231MZ/V+ is a temperature-compensated real-time clock and calendar with ±5 ppm accuracy, a 2.3 V to 5.5 V supply range, and a 400 kHz I2C interface, housed in an 8-pin SOIC package. It combines a microelectromechanical systems resonator with a crystal oscillator to maintain accurate timekeeping when the main supply is interrupted through its battery input. A real-time clock, or RTC, is a timing IC that preserves calendar and clock information independently of a system processor. In the product hierarchy, an RTC belongs to clock and timing ICs, then integrated circuits, and ultimately semiconductor devices. Unlike a simple counter driven by an external crystal, the DS3231MZ/V+ integrates the resonant timing element, oscillator circuitry, calendar logic, and battery-backed timekeeping into one 8-pin device. Key features include ±5 ppm clock accuracy, temperature compensation, 2.3 V to 5.5 V operation, and an I2C-compatible two-wire serial interface rated for 400 kHz. The device supports continued operation from a coin-cell battery when the primary supply is unavailable, making it useful for wall-clock timestamps, event logging, and systems that must preserve time across resets or power interruptions. Its SOIC-8 surface-mount package also supports conventional PCB assembly and automated production. The DS3231M family uses integrated microelectromechanical systems technology with a temperature-compensated MEMS resonator, providing accurate timekeeping without relying on an external discrete crystal. The DS3231MZ/V+ is identified by the verified distributor data as an 8-SOIC, 0.154-inch, 3.90 mm-wide I2C real-time clock. Its two-wire interface allows a host microcontroller or processor to read and write calendar and clock registers while minimizing connection count. Typical uses include industrial control systems, environmental monitoring, data acquisition equipment, consumer appliances, embedded instruments, and network-connected IoT equipment. In each case, the device can maintain a consistent calendar reference while the main supply is cycling or the embedded controller is being reset. Its 5 ppm rating is particularly useful when timestamp accuracy matters more than the lower cost of a basic oscillator-only RTC. Designers should provide a stable decoupling path between VCC and ground, confirm the pull-up requirements of the I2C bus, and ensure that the backup cell is installed with the correct polarity. Software must also account for the device's register structure and square-root-of-10 frequency register rather than treating it as a generic wall-clock component. Because the exact public pin names were not included in the supplied verified data, the pinout is reported as unavailable rather than reconstructed from memory. This page combines verified manufacturer and distributor information, RoHS status, supply details, structured drop-in comparison candidates, pricing evidence, and practical implementation guidance. It is designed to help engineers evaluate the DS3231MZ/V+ for battery-backed timekeeping while separating verified facts from parameters that still require confirmation from the complete manufacturer datasheet.

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