Analog Devices Inc./Maxim Integrated DS1350ABP-70+

Overview

DS1350ABP-70+ from Maxim Integrated is a 4,194,304-bit (524,288 × 8) nonvolatile SRAM with integrated lithium backup, PowerCap Module (PCM) packaging, 70ns access time, ±5% VCC tolerance (4.75V–5.25V), and industrial-grade battery monitoring. It serves as a drop-in replacement for 512k × 8 SRAM/EEPROM/Flash in mission-critical data logging systems requiring guaranteed retention during power loss.

For engineers reviewing the DS1350ABP-70+ datasheet, DS1350ABP-70+ pinout, DS1350ABP-70+ application, or DS1350ABP-70+ equivalent, key selection criteria include its 70ns read/write timing, open-drain RST/BW outputs with 10mA sink capability, 50µA typical standby current, 10-year data retention claim, and PCM-specific surface-mount + snap-on PowerCap architecture requiring DS9034PC+.

Technical Context

The DS1350ABP-70+ implements autonomous power-fail detection at VTP = 4.50–4.75V, triggering unconditional write protection and high-impedance I/O within 1.5µs (tPD). Its internal circuitry switches to lithium backup below ~2.7V while holding RST active for 200ms during power-up to suppress transients.

It features dual-mode battery monitoring: daily 1-second load test via 1MΩ resistor, with BW assertion if voltage drops below 2.6V; BW remains latched until replacement or retest confirms >2.6V. All control signals (CE, WE, OE) and address/data lines operate under strict 70ns AC timing constraints with tCOE = 5ns and tODW = 25ns.

Key Specifications

Pinout & Package

DS1350ABP-70+ uses a 34-pin PowerCap Module (PCM) package - a surface-mountable hybrid assembly integrating SRAM die, control logic, and battery interface contacts. The PCM is designed for reflow soldering prior to PowerCap attachment; the DS9034PC+ snaps on post-assembly to complete the NV SRAM function.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nonvolatile SRAM applications.

Compared with DS1350YP-70+, DS1350ABP-70+ provides stricter VCC regulation compliance and earlier write-protection activation, while STK13C68-J15F sacrifices integrated supervision for standard packaging - making DS1350ABP-70+ optimal for new designs prioritizing reliability over footprint constraints.

Availability

DS1350ABP-70+ is available at Aetrix Electronics and suitable for industrial data loggers, medical device memory backup, avionics recorders, and smart grid relays requiring stable component supply with guaranteed 10-year data retention and field-replaceable backup power.

Supply support for DS1350ABP-70+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The DS1350ABP-70+ belongs to Maxim's nonvolatile SRAM product line, engineered specifically for systems demanding zero-data-loss memory backup during unpredictable power failures - combining SRAM speed with autonomous battery management.

FAQ

What is the required companion component for DS1350ABP-70+ to function as a complete nonvolatile SRAM?

The DS1350ABP-70+ requires the DS9034PC+ or DS9034PCI+ PowerCap to be snapped onto its 34-pin PowerCap Module base. The PCM contains the SRAM and control logic but no battery; the PowerCap provides the lithium energy source and completes the nonvolatile functionality. Both components are ordered separately and shipped in distinct containers per Maxim's ordering specification.

How does DS1350ABP-70+ ensure data integrity during power failure?

DS1350ABP-70+ continuously monitors VCC and triggers write protection within 1.5µs (tPD) when voltage falls below 4.50–4.75V (VTP). It then places all inputs in "don't care" state and drives outputs to high-impedance. At ~2.7V, it seamlessly switches to lithium backup power to retain RAM contents - all without host intervention or external circuitry.

What is the purpose of the BW pin on DS1350ABP-70+ and how is it used?

The BW (Battery Warning) pin on DS1350ABP-70+ is an open-drain output that latches active when the internal lithium battery voltage drops below 2.6V during its daily 1-second test. Once asserted, BW remains active until the PowerCap is replaced or subsequent testing confirms voltage >2.6V. External pull-up is required, and BW can sink up to 10mA for direct LED or microcontroller interrupt use.

Can DS1350ABP-70+ operate without the PowerCap installed?

No - DS1350ABP-70+ cannot retain data without the DS9034PC+ or DS9034PCI+ PowerCap physically attached. The PCM base contains no battery; the PowerCap provides both the lithium cell and the electrical interface. While the SRAM may function temporarily on VCC alone, nonvolatility - including 10-year retention and autonomous backup - is only enabled with the correct PowerCap snapped into place.

What is the significance of the "-70" suffix in DS1350ABP-70+?

The "-70" suffix in DS1350ABP-70+ denotes a 70ns access time rating - specifying maximum tACC, tRC, and tWC values under valid operating conditions. This guarantees the device meets tight timing windows for interfacing with high-speed microcontrollers and FPGAs without added wait states, distinguishing it from slower variants like -100 or -120 versions in the same family.