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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 268kB) Download   E-Mail

Description

The DS1250W 3.3V 4096k NV SRAM is a 4,194,304-bit, fully static, nonvolatile SRAM organized as 524,288 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry, which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent data corruption. DIP-package DS1250W devices can be used in place of existing 512k x 8 static RAMs directly conforming to the popular bytewide 32-pin DIP standard. DS1250W devices in the PowerCap Module package are directly surface mountable and are normally paired with a DS9034PC PowerCap to form a complete Nonvolatile SRAM module. There is no limit on the number of write cycles that can be executed and no additional support circuitry is required for microprocessor interfacing.

This product contains lithium-metal batteries. See applicable regulations for transport requirements for batteries in equipment.

Key Features

10 years minimum data retention in the absence of external power Data is automatically protected during power loss Replaces 512k x 8 volatile static RAM, EEPROM or Flash memory Unlimited write cycles Low-power CMOS Read and write access times as fast as 100ns Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time Optional industrial temperature range of -40°C to +85°C, designated IND JEDEC standard 32-pin DIP package PowerCap Module (PCM) package Directly surface-mountable module Replaceable snap-on PowerCap provides lithium backup battery Standardized pinout for all nonvolatile SRAM products Detachment feature on PCM allows easy removal using a regular screwdriver Underwriters Laboratories (UL®) Recognized

Diagram

Pin Assignment

Application Notes

Application Note 202: NV SRAM Frequently Asked Questions - DS1250W Application Note 1066: Tech. Brief 39: NV SRAM Cross Reference Table - DS1250W Application Note 3759: Timing Considerations When Using NVSRAM - DS1250W Application Note 4006: NVSRAM Device Programmers - DS1250W Application Note 4289: Low-Temperature Data Retention in Nonvolatile SRAM - DS1250W

Reliability Reports

Request Reliability Report for: DS1250W Underwriters Laboratories (UL®) Recognized

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-12 of 12

DS1250W	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1250W-100+				Active	EDIP;32 pin;707 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT32+6*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1250W-100IND+				Active	EDIP;32 pin;707 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT32+6*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1250W-150+				Active	EDIP;32 pin;707 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT32+6*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1250W-100	3.3V, 100ns			Active	EDIP;32 pin;707 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT32-6*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1250W-150	3.3V, 150ns			Active	EDIP;32 pin;707 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT32-6*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1250W-100IND	3.3V, 100ns			Active	EDIP;32 pin;707 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT32-6*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1250WP-150+				Active	PCAP;34 pin;597 mm² Outline Drawing: 21-0246 (PDF) Land Pattern: Not Available Use pkgcode/variation: PC2+5*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1250WP-100IND+				Active	PCAP;34 pin;597 mm² Outline Drawing: 21-0246 (PDF) Land Pattern: Not Available Use pkgcode/variation: PC2+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1250WP-100	3.3V, 100ns			Active	PCAP;34 pin;597 mm² Outline Drawing: 21-0246 (PDF) Land Pattern: Not Available Use pkgcode/variation: PC2-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1250WP-150	3.3V, 150ns			Active	PCAP;34 pin;597 mm² Outline Drawing: 21-0246 (PDF) Land Pattern: Not Available Use pkgcode/variation: PC2-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1250WP-150-C01				Active	PCAP;34 pin;597 mm² Outline Drawing: 21-0246 (PDF) Land Pattern: Not Available Use pkgcode/variation: PC2-5*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1250WP-100IND	3.3V, 100ns			Active	PCAP;34 pin;597 mm² Outline Drawing: 21-0246 (PDF) Land Pattern: Not Available Use pkgcode/variation: PC2-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

More Information

UL Certified

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