Analog Devices Inc./Maxim Integrated DS1270Y-70#

Overview

DS1270Y-70# from Maxim Integrated is a 16M-bit (2,097,152 × 8) nonvolatile SRAM with integrated lithium battery backup, 70 ns access time, ±10% V_CC tolerance (4.5V–5.5V), and automatic power-loss data protection for industrial memory retention in embedded controllers and legacy systems.

For engineers reviewing the DS1270Y-70# datasheet, DS1270Y-70# pinout, DS1270Y-70# application, or DS1270Y-70# equivalent, key selection criteria include guaranteed 5-year data retention without external power, unlimited write cycles, full V_CC monitoring and switchover at ~3.0V, and compatibility with standard 5V microprocessor buses requiring no external support circuitry.

Technical Context

The DS1270Y-70# implements a self-contained NV-SRAM architecture with on-die voltage monitoring, lithium battery switching logic, and CMOS-compatible TTL-level interface timing. It operates as a drop-in replacement for volatile SRAMs while adding autonomous data preservation during brownouts or main power failure.

Its control logic enforces unconditional write protection when V_CC falls below 4.25V (V_TP), disables all inputs, places outputs in high-impedance state, and activates the lithium source within 1.5 µs (t_PD). During power-up, it reverts to V_CC supply above ~3.0V and resumes normal operation once V_CC exceeds 4.5V.

Key Specifications

Pinout & Package

DS1270Y-70# uses a 36-pin 740-mil Extended Dual In-line Package (EDIP), designed for wave or hand soldering only. Pin 1 is located at the left end of the top row (A18), with pins numbered counter-clockwise around the perimeter.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1270AB-70# and STK12C68, the DS1270Y-70# provides broader supply tolerance and earlier write protection activation-critical for systems with marginal or aging power supplies-while eliminating external components needed by STK12C68.

Availability

DS1270Y-70# is available at Aetrix Electronics and suitable for industrial data loggers, medical device memory backup, avionics black box recorders, and legacy industrial PLCs requiring stable component supply with long-term lifecycle assurance.

Supply support for DS1270Y-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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The DS1270Y-70# belongs to Maxim's nonvolatile SRAM product line, engineered to replace volatile memory in mission-critical systems where data persistence during power loss is non-negotiable.

FAQ

What is the guaranteed data retention period for DS1270Y-70# without external power?

The DS1270Y-70# guarantees a minimum of 5 years of data retention in the absence of external power. This value is assured by component selection, process control, and design-not measured per unit during production testing-and begins counting from the moment V_CC is first applied by the user. The lithium energy source remains disconnected until initial power-on, preserving full capacity.

Does DS1270Y-70# require external circuitry for battery backup operation?

No, DS1270Y-70# requires no external circuitry for battery backup operation. It integrates a lithium energy source, voltage monitoring circuitry, and automatic power-switching logic. When V_CC drops below ~3.0V, the device autonomously connects the lithium cell to retain RAM contents-no external supervisor IC, diodes, or capacitors are needed.

What is the difference between DS1270Y-70# and DS1270AB-70#?

The DS1270Y-70# supports a wider V_CC range (4.5V–5.5V, ±10%) and lower write-protection threshold (4.25V–4.5V), making it more robust in brownout-prone environments. DS1270AB-70# uses a tighter ±5% V_CC range (4.75V–5.25V) and higher V_TP (4.50V–4.75V). Both share identical pinout, timing, and package.

Can DS1270Y-70# be used in industrial temperature environments?

The DS1270Y-70# is rated for 0°C to +70°C (commercial grade). For industrial temperature operation (-40°C to +85°C), use the DS1270Y-70IND# variant, which shares identical electrical specifications and pinout but is qualified across the extended range and marked with "IND" suffix.

Is DS1270Y-70# RoHS-compliant?

Yes, DS1270Y-70# is RoHS-compliant. The "#" suffix in the part number denotes compliance with EU RoHS Directive 2011/65/EU, including exemption for lead (Pb) in the glass frit of the ceramic package seal, permitted under Annex III.