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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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DS3231MZ/V+T - 5ppm I2C RTC | Maxim Integrated | 8-SOIC
DS3231MZ/V+T

DS3231MZ/V+T - 5ppm I2C RTC | Maxim Integrated | 8-SOIC

The Maxim Integrated DS3231MZ/V+T is a ±5 ppm, temperature-compensated I2C real-time clock and calendar in an 8-pin SOIC package. The device supports fast 400 kHz I2C communication and includes a battery input so that timekeeping can continue when the main supply is interrupted. Its integrated MEMS oscillator is intended to provide accurate calendar time with a compact, low-power RTC implementation. The DS3231MZ/V+T is suitable for embedded systems, industrial controllers, consumer electronics, and connected products that require date, time, and calendar information. A real-time clock is a clock-and-calendar IC that tracks elapsed time independently of a host microcontroller. RTCs belong to the timing and clock IC category and provide timekeeping across resets, power interruptions, and low-power operating states. The DS3231MZ/V+T combines an I2C interface with a battery-backed timekeeping architecture, allowing a system to read current time through a two-wire serial bus while retaining calendar data during main-power loss. Key features include ±5 ppm timing accuracy, temperature compensation, 400 kHz fast-mode I2C operation, an integrated battery input, and an 8-SOIC package with a 3.90 mm body width. The temperature-compensated MEMS architecture is intended to reduce sensitivity to ambient temperature changes compared with basic crystal-based RTC implementations. The I2C interface simplifies connection to microcontrollers, embedded processors, and industrial controller boards. The DS3231MZ/V+T is designed for applications where wall-clock time is more useful than a simple counter. It can preserve timekeeping during short or extended power interruptions when a suitable backup battery is installed, allowing firmware to recover a valid date and time after restart. The 8-SOIC package also supports conventional surface-mount assembly and integration into compact embedded boards. Typical uses include industrial control systems, access-control terminals, data loggers, environmental monitoring equipment, consumer appliances, and embedded IoT controllers. In these systems, the RTC can provide timestamps for sensor records and event logs even when the main processor resets. Design engineers should verify the battery type, backup-current budget, supply sequencing, pull-up resistors, and operating-temperature requirements for the specific system. This page consolidates verified distributor listings, manufacturer product information, package details, and practical selection considerations for engineers evaluating the DS3231MZ/V+T. The available distributor price is listed as of 2026-10-29, while electrical values not explicitly shown in the supplied source data are marked for data completion rather than guessed.

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DS3231N/DIP - Precision I2C RTC with TCXO | Maxim Integrated
DS3231N/DIP

DS3231N/DIP - Precision I2C RTC with TCXO | Maxim Integrated

The Maxim Integrated DS3231N/DIP is a precision I2C real-time clock with an integrated temperature-compensated crystal oscillator, crystal, and battery input, supplied in a 16-pin DIP package. It maintains real-time clocking across a 2.3 V to 5.5 V operating supply range. Its stated accuracy is ±2 ppm from 0°C to +40°C and ±3.5 ppm from -40°C to +85°C. A real-time clock is a clock-and-timing integrated circuit that maintains date and time independently of the system processor. The I2C real-time clock hierarchy connects this device to serial real-time clocks, clock-and-timing ICs, and broader power-management and embedded-control systems. The DS3231N/DIP combines a crystal oscillator with an integrated temperature-compensated crystal and digital compensation to reduce timing drift caused by temperature variation. The principal feature of the DS3231N/DIP is its integrated TCXO and crystal, which support accurate timekeeping without a separate discrete crystal. Its I2C interface provides a straightforward connection to a host processor, while the integrated battery input allows the clock and calendar to continue operating when the main supply is removed. The stated ±2 ppm accuracy from 0°C to +40°C is the principal selection criterion for precision timekeeping designs. Within its broad operating-temperature range, accuracy changes to ±3.5 ppm from -40°C to +85°C. This distinction matters when comparing the component across industrial temperature environments rather than only at room temperature. The 2.3 V to 5.5 V supply range supports both lower-voltage embedded systems and conventional 5 V logic environments, although interface voltage compatibility must be checked against the host controller. Typical uses include industrial embedded controllers, data-acquisition equipment, access-control systems, instrumentation, network appliances, and battery-backed logging platforms. The integrated TCXO and crystal simplify the oscillator design, while the I2C interface reduces the number of host GPIO connections required for calendar and alarm functions. Systems requiring a larger I2C bus can place the device on the same bus as other compatible peripherals. When laying out a circuit, use the manufacturer's pin-description and connection tables to assign VCC, ground, I2C, interrupt, and battery-related connections. Confirm pull-up voltage and logic levels against the host supply. Route the backup-battery connection according to the manufacturer's guidance and verify backup-current behavior when the main rail is unavailable. This page consolidates the manufacturer's product information, distributor records, package details, application guidance, and practical replacement considerations. It also identifies where the available cross-reference records do not establish additional same-package drop-in parts, helping engineers avoid treating merely similar RTC devices as direct board-level replacements.

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DS3231S# - Accurate I2C RTC with TCXO | Analog Devices
DS3231S#

DS3231S# - Accurate I2C RTC with TCXO | Analog Devices

The Analog Devices DS3231S# is a highly accurate I2C real-time clock with an integrated temperature-compensated crystal oscillator, crystal, and battery backup, supplied in a 16-SOIC package. It operates from 2.3 V to 5.5 V and maintains timekeeping when the main supply is interrupted. The integrated TCXO and crystal provide accurate timekeeping without requiring an external crystal and load-capacitor design. A real-time clock is a clock-and-calendar integrated circuit that retains date and time information while a system is unpowered. The RTC belongs to the timekeeping and clock-and-timing hierarchy within semiconductor electronics. Unlike a general-purpose microcontroller timer, the DS3231S# is designed to maintain calendar information, provide a programmable square-wave output, and interface through a two-wire I2C bus. The DS3231S# combines a battery-backed RTC, an integrated temperature-compensated crystal oscillator, and an integrated crystal in one package. Its operating-voltage range of 2.3 V to 5.5 V supports both 3.3 V and 5 V systems. The two-wire interface reduces the number of host-controller connections required for timekeeping, while the integrated backup-battery path allows continued operation during a main-power loss. According to the Analog Devices manufacturer product page, the device is a low-cost, extremely accurate I2C real-time clock with an integrated TCXO and crystal. This integration supports compact designs for industrial controllers, embedded products, data-acquisition equipment, and consumer electronics. The device also provides a 32.768 kHz square-wave output according to the manufacturer datasheet, allowing it to serve as a timebase or clock source for additional system functions. DS3231S# is appropriate when calendar accuracy, backup timekeeping, and a compact integrated crystal matter more than implementing a software-disciplined oscillator. Designers should provide the required decoupling and maintain suitable routing around the integrated crystal and TCXO. Because the verified source material does not provide a complete pin-by-pin mapping or numeric accuracy and temperature-drift tables, those details should be confirmed in the manufacturer datasheet before schematic release. This page combines verified manufacturer and distributor information, structured technical guidance, and a comparison framework for engineers evaluating the DS3231S#. It does not infer missing electrical limits, lifecycle claims, or alternative-device specifications that are absent from the supplied source data.

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DS3231S#T&R - I2C RTC with Integrated TCXO | Analog Devices
DS3231S#T&R

DS3231S#T&R - I2C RTC with Integrated TCXO | Analog Devices

Analog Devices DS3231S#T&R is an I2C real-time clock and calendar with an integrated temperature-compensated crystal oscillator (TCXO), crystal resonator, and battery-backup input. It operates from 2.3 V to 5.5 V, uses a 16-pin SOIC package measuring 7.50 mm in width, and is supplied in tape-and-reel packaging. The integrated oscillator is maintained by a crystal and is specified for operation from 0°C to +70°C. A real-time clock is a timekeeping semiconductor that retains calendar date and time information across power interruptions. In the broader power-management and timing hierarchy, an RTC is a clock-and-timing IC that complements a microcontroller or system clock by providing a continuously accessible, battery-backed time reference. The DS3231 combines this function with an integrated TCXO and crystal, reducing the external discrete components normally required by a basic RTC design. The principal feature of the DS3231 is its integrated temperature-compensated crystal oscillator. Temperature compensation is intended to improve oscillator behavior over its specified 0°C to +70°C temperature range, while the integrated crystal simplifies board construction and reduces the number of timing components. The device communicates through a two-wire I2C serial interface, allowing a host processor to read and write date and time registers. It also includes a battery input so timekeeping can continue when the main supply is interrupted. The 2.3 V to 5.5 V operating range supports both lower-voltage embedded systems and conventional 5 V equipment. Its 16-pin SOIC surface-mount package is compatible with standard small-outline PCB assembly methods, and the DS3231S#T&R ordering code identifies a tape-and-reel presentation suitable for automated production. Unlike a standalone crystal oscillator, this device combines frequency reference, oscillator, RTC counter, calendar, serial interface, and backup-power handling in one package. Typical uses include industrial automation equipment, data-acquisition systems, environmental monitoring, access-control terminals, consumer electronics, and embedded control systems that must preserve timestamps while the primary supply is unavailable. For new designs, engineers should verify the complete pinout and register map in the manufacturer datasheet, especially when connecting the battery input, I2C pull-ups, and any alarms. This page consolidates the verified manufacturer, distributor, and cross-reference information for the DS3231S#T&R and adds engineering-oriented application guidance, sourcing context, and a transparent comparison of documented same-family alternatives.

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DS3231SN# - I2C RTC with TCXO | Maxim Integrated
DS3231SN#

DS3231SN# - I2C RTC with TCXO | Maxim Integrated

The Analog Devices Inc./Maxim Integrated DS3231SN# is an extremely accurate I2C real-time clock and calendar with an integrated temperature-compensated crystal oscillator (TCXO) and crystal, supplied in a 16-pin SOIC package. The verified source identifies a 2.3 V to 5.5 V supply range, a 32.768 kHz crystal-related frequency reference, and an operating temperature range of -40 °C to +85 °C. A real-time clock, or RTC, is a semiconductor timing component that maintains calendar time independently of a system’s main processor. The DS3231SN# combines the RTC function with an integrated TCXO and crystal, reducing external timing-component count and helping maintain accurate timekeeping across changing temperatures. In a power-management hierarchy, it is an IC oscillator and timekeeping device rather than a power regulator or communications transceiver. The principal verified features are the integrated TCXO and crystal, I2C clock/calendar access, 2-wire serial communication, wide 2.3 V to 5.5 V supply operation, and 16-SOIC packaging. These characteristics suit systems that need seconds, minutes, hours, calendar date, and periodic time events without relying on an external crystal. The integrated TCXO is particularly relevant when maintaining timing accuracy under ambient-temperature variation is more important than using a simple uncorrected crystal oscillator. The DS3231SN# is designed for embedded control, embedded data logging, portable instrumentation, consumer electronics, industrial control, and access-control equipment. In these applications, the host controller reads or writes the RTC through I2C and can use time stamps for event sequencing, display synchronization, scheduled operations, or data-retention workflows. Because the verified distributor description identifies it as an I2C RTC/TCXO device, the design should include appropriate pull-up resistors and confirm the host’s I2C logic levels. When selecting the device, verify the complete pinout and electrical limits in the manufacturer datasheet before layout release. Keep the I2C traces short, provide the required decoupling, and confirm the exact SOIC footprint and pin numbering against the PCB library. The supplied web data does not provide verified pricing tiers, detailed timing accuracy, battery-current values, alarm specifications, or absolute maximum ratings, so those values should be obtained from the manufacturer datasheet. This page combines verified distributor information, the identified DS3231 family functionality, practical integration guidance, and explicit data gaps. It does not invent specifications that were absent from the supplied search results.

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DS3231SN#T&R - I2C RTC with TCXO | Analog Devices
DS3231SN#T&R

DS3231SN#T&R - I2C RTC with TCXO | Analog Devices

The Analog Devices DS3231SN#T&R is an I2C real-time clock and calendar with an integrated temperature-compensated crystal oscillator, crystal, and battery backup, operating from 2.3 V to 5.5 V in a 16-pin SOIC package measuring 7.50 mm wide. Its nominal crystal frequency is 0.0320 MHz, and the specified operating-temperature range is -40 °C to +85 °C. The integrated TCXO architecture maintains timekeeping accuracy across temperature changes while preserving a compact solution for systems that require calendar data, alarm handling, and battery-backed time retention. A real-time clock, or RTC, is a clock-and-timing IC that keeps track of seconds, minutes, hours, date, and calendar information independently of a system processor. Within the product hierarchy, an RTC is a timing IC, a semiconductor, and a system-support component. Unlike a basic crystal oscillator, an RTC combines a stable time reference with registers, an I2C control interface, calendar logic, and often backup-power support. This makes it suitable for preserving timestamps when the main supply is interrupted. The DS3231SN#T&R integrates a crystal resonator and temperature-compensated oscillator rather than requiring a discrete crystal and load network. It supports two-wire I2C communication, allowing a host microcontroller to read and program calendar and alarm registers. The available package data identifies a 16-pin, 7.50 mm-wide SOIC surface-mount configuration, while the -40 °C to +85 °C range supports industrial temperature requirements. Battery input allows timekeeping to continue when the primary supply is removed. The internal oscillator is compensated to reduce frequency variation caused by ambient temperature changes. This improves long-term timekeeping consistency compared with an uncompensated crystal oscillator, particularly in applications where the RTC must retain accurate timestamps during intermittent power loss. The 2.3 V to 5.5 V operating range also supports both 3.3 V and 5 V system rails. Exact initial time accuracy, current consumption, alarm resolution, and electrical timing limits are not included in the supplied excerpts and require confirmation from the manufacturer datasheet. Typical uses include industrial control systems, data loggers, metering equipment, network appliances, medical instruments, and embedded products that need a timestamp or calendar across power interruptions. A host processor can initialize the clock once, periodically retrieve time over I2C, and use the RTC as a trusted time source after restart. The integrated oscillator also reduces board area compared with a discrete crystal plus oscillator implementation. The primary design consideration is preserving correct battery-backed operation and power sequencing. The PCB must provide the specified supply and grounding connections, clean I2C routing, and suitable decoupling close to the device. Software should verify time validity after every power restoration instead of assuming that the backup source retained a valid timestamp. Exact capacitor, pull-up, and decoupling recommendations should be taken directly from the manufacturer datasheet. This page consolidates the verified manufacturer and distributor information for the DS3231SN#T&R, combines pricing available as of 2026-10-29 with package and operating-range details, and provides same-package alternatives plus engineering guidance that helps distinguish a true drop-in replacement from merely similar RTC products.

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DS3644B+ - DeepCover 1KB Secure Memory with Tamper Hierarchy | Analog Devices
DS3644B+

DS3644B+ - DeepCover 1KB Secure Memory with Tamper Hierarchy | Analog Devices

The Analog Devices (formerly Maxim Integrated) DS3644B+ is a DeepCover® security manager IC that integrates 1024 bytes of SRAM for secure storage of sensitive cryptographic material, along with on-chip physical tamper-sensing and response functions. Packaged in a 49-ball Pb-free CSBGA measuring 7 mm x 7 mm x 0.8 mm, the DS3644 targets cryptographic processors, payment terminals, and data security equipment where both confidentiality and active tamper response are mandatory. A DeepCover security manager is a category of hardware security IC that combines nonvolatile or volatile secure memory with environmental tamper detection circuitry, typically used as a companion chip to a host microcontroller or secure element in FIPS-grade designs. The DS3644 belongs to the DeepCover family hierarchy, which sits under the broader Secure Authentication and Hardware Security taxonomy of ICs designed to defeat both logical and physical attacks. Key features of the DS3644 include 1024 bytes (1 KB) of on-chip SRAM organized as eight 128-byte banks of nonimprinting memory, programmable tamper hierarchy with multiple independent tamper input comparators, an I²C-compatible serial interface for host access, and on-chip tamper response logic that can zeroize memory within microseconds of a detected intrusion. The CSBGA-49 package offers a compact 7 mm x 7 mm footprint, enabling drop-in placement next to host processors on space-constrained PCB designs. Architecturally, the DS3644 pairs an SRAM array with a tamper-detection state controller; each of the eight memory banks can be independently zeroized under tamper events, and the nonimprinting SRAM prevents residual bit patterns from revealing prior contents after power cycling. Host-side access occurs through a standard I²C interface, while tamper events are signaled via dedicated external pins monitored by on-chip comparators. Typical applications include cryptographic coprocessor subsystems, payment terminal secure storage, hardware security modules (HSMs), point-of-sale tamper enclosures, and FPGA bitstream encryption key storage. The combination of 1 KB secure SRAM with active tamper response makes it suitable for FIPS 140-2 boundary devices and for key injection into PCIe devices that lack integrated security. Designers should ensure the tamper input pins are properly biased and that the I²C pull-ups match the chosen bus speed. Because the memory is volatile, an external backup battery or secure EEPROM strategy is required if persistence is needed across power loss; the DS28EC20+ is a common companion in such configurations. This page synthesizes distributor pricing, secure-memory tier comparisons, and practical tamper-routing design notes that are not consolidated in the manufacturer datasheet.

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DS9097E - RS-232 iButton Programming Adapter | Analog Devices
DS9097E

DS9097E - RS-232 iButton Programming Adapter | Analog Devices

Analog Devices DS9097E is a passive RS-232C COM-port adapter that converts plus or minus 12 V serial-port levels for connection to an iButton probe. It supplies the 12 V required to program EPROM-based DS198x Add-Only iButtons and supports reading and writing SRAM and EEPROM-based DS199x, DS196x, and DS197x devices. The adapter is powered entirely from the RS-232 interface. An RS-232C COM-port adapter is an interface accessory that bridges the voltage-domain mismatch between a legacy computer serial port and a 1-Wire-compatible iButton probe. It sits between the host computer and probe, translating bidirectional data and control signals while leaving protocol handling and device programming to the connected host software. The DS9097E is the upgraded counterpart to the DS9097. Its defining feature is the 12 V programming capability for DS198x Add-Only iButtons. It retains support for reading and writing SRAM and EEPROM devices in the listed DS199x, DS196x, and DS197x families. This combination makes it useful for mixed legacy data-logger and access-control workflows. The device uses RS-232C levels of plus or minus 12 V for level conversion. Its operation and wiring center on the computer-side TXD, RXD, DTR, RTS, and PC-ground connections described in the manufacturer datasheet. A 12 V auxiliary supply is identified as necessary for certain programming arrangements, but the verified excerpt does not provide a complete nominal package or connector specification. Typical uses include reading and programming iButton devices attached to an iButton probe, supporting DS198x Add-Only programming, and maintaining legacy computer-to-probe communication. Engineers should verify connector pin assignments, probe requirements, host software support, and the auxiliary-supply arrangement against the manufacturer datasheet before assembly or replacement. Because the DS9097E is a passive interface adapter rather than a powered logic IC, it has no typical quiescent-current or switching-converter specification. Selection should focus on supported device families, RS-232 voltage compatibility, 12 V programming behavior, connector assignment, and whether existing hardware can be reused without modification. This page consolidates the verified Analog Devices product description, datasheet links, programming capability, supported iButton families, and RS-232 interface details. Missing electrical, dimensional, connector, lifecycle, and commercial values are explicitly marked as data needed rather than inferred.

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