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Data Sheet

FULL DATA SHEET (PDF, 172kB) Download   E-Mail

Description

The DS1220AB and DS1220AD 16k Nonvolatile (NV) SRAMs are 16,384-bit, fully static, NV SRAMs organized as 2048 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry that 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. The NV SRAMs can be used in place of existing 2k x 8 SRAMs directly conforming to the popular bytewide 24-pin DIP standard. The devices also match the pinout of the 2716 EPROM and the 2816 EEPROM, allowing direct substitution while enhancing performance. 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 Directly replaces 2k x 8 volatile static RAM or EEPROM Unlimited write cycles Low-power CMOS JEDEC standard 24-pin DIP package 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 Full ±10% VCC operating range (DS1220AD) Optional ±5% VCC operating range (DS1220AB) Optional industrial temperature range of -40°C to +85°C, designated IND Underwriters Laboratories (UL®) Recognized

Diagram

Pin Assignment

Application Notes

Application Note 202: NV SRAM Frequently Asked Questions - DS1220AB, DS1220AD Application Note 1066: Tech. Brief 39: NV SRAM Cross Reference Table - DS1220AB, DS1220AD Application Note 3759: Timing Considerations When Using NVSRAM - DS1220AB, DS1220AD Application Note 4006: NVSRAM Device Programmers - DS1220AB, DS1220AD Application Note 4289: Low-Temperature Data Retention in Nonvolatile SRAM - DS1220AB, DS1220AD Application Note 4392: How to Replace a DS1213 SmartSocket with an Equivalent-Density NV SRAM Module - DS1220AB

Reliability Reports

Request Reliability Report for: DS1220AB DS1220AD 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: 1-25 of 25

DS1220AB	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1220AB-150+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AB-120+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AB-200IND+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AB-100IND+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AB-150IND+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AB-200+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AB-100	5% Tolerance, 100ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1220AB-120	5% Tolerance, 120ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1220AB-150	5% Tolerance, 150ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1220AB-200	5% Tolerance, 200ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1220AB-100IND	5% Tolerance, 100ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1220AB-150IND				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1220AB-200IND	5% Tolerance, 200ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1220AD	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1220AD-200IND+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AD-100IND+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AD-100+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AD-200+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AD-100	10% Tolerance, 100ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1220AD-120	10% Tolerance, 120ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1220AD-150	10% Tolerance, 150ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1220AD-200	10% Tolerance, 200ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1220AD-120+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AD-150+				Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1220AD-100IND	10% Tolerance, 100ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1220AD-200IND	10% Tolerance, 200ns			Active	EDIP;24 pin;609.6 mm² Outline Drawing: 21-0245 (PDF) Land Pattern: Not Available Use pkgcode/variation: MDT24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

More Information

UL Certified

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