DS1245AB, DS1245Y 1024k Nonvolatile SRAM

Description

The DS1245 1024k Nonvolatile (NV) SRAMs are 1,048,576-bit, fully static, nonvolatile SRAMs organized as 131,072 words by 8 bits. Each complete NV SRAM has a self-contained lithium energy source and control circuitry which constantly monitors V_CC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is nconditionally enabled to prevent data corruption. DIP-package DS1245 devices can be used in place of existing 128k x 8 static RAMs directly conforming to the popular bytewide 32-pin DIP standard. DS1245 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.

Key Features

10 years minimum data retention in the absence of external power
Data is automatically protected during power loss
Replaces 128k x 8 volatile static RAM, EEPROM or Flash memory
Unlimited write cycles
Low-power CMOS
Read and write access times as fast as 70ns
Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
Full ±10% V_CC operating range (DS1245Y)
Optional ±5% V_CC operating range (DS1245AB)
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 PowerCap allows easy removal using a regular screwdriver
Underwriters Laboratories (UL®) Recognized

Key Specifications: Memory (EPROM, EEPROM, ROM, NV SRAM)

Part Number

Memory Type

Memory Size

Bus Type

Real-Time Clock

DIP with Internal Battery

PowerCap Package

Battery Monitor

With GPIO

Single Piece Module

Supply Voltage (min) (V)

Supply Voltage (max) (V)

Price^**

DS1245AB

NV SRAM

128K x 8

Parallel

Yes

4.75

5.25

$11.94 @ 1k

DS1245Y

4.5

5.5

$11.94 @ 1k

See All Memory (EPROM, EEPROM, ROM, NV SRAM) (69)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Ordering Information

Notes:

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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: 1-38 of 38

DS1245AB

Notes

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

DS1245AB-100+

0 pin;

Use pkgcode/variation: MDT32+6*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245AB-85+

0 pin;

Use pkgcode/variation: MDT32+6*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245AB-120+

0 pin;

Use pkgcode/variation: MDT32+6*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245AB-120IND+

0 pin;

Use pkgcode/variation: MDT32+6*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245AB-70IND+

0 pin;

Use pkgcode/variation: MDT32+6*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245AB-70

5% Tolerance, 70ns

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245AB-70+

0 pin;

Use pkgcode/variation: MDT32+6*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245AB-120

5% Tolerance, 120ns

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245AB-100

5% Tolerance, 100ns

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245AB-85

5% Tolerance, 85ns

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245AB-70IND

5% Tolerance, 70ns

0 pin;

Use pkgcode/variation: MDT32-6*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

DS1245AB-120IND

5% Tolerance, 120ns

0 pin;

Use pkgcode/variation: MDT32-6*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

DS1245ABP-100+

0 pin;

Use pkgcode/variation: PC2+3*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245ABP-70+

0 pin;

Use pkgcode/variation: PC2+3*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245ABP-70IND+

0 pin;

Use pkgcode/variation: PC2+3*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245ABP-100

5% Tolerance, 100ns

0 pin;

Use pkgcode/variation: PC2-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245ABP-70

5% Tolerance, 70ns

0 pin;

Use pkgcode/variation: PC2-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245ABP-70IND

5% Tolerance, 70ns

0 pin;

Use pkgcode/variation: PC2-3*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

DS1245Y

Notes

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

DS1245YL-70IND

-40°C to +85°C

See data sheet

DS1245Y-FIR

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245Y-70

10% Tolerance, 70ns

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245Y-120

10% Tolerance, 120ns

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245Y-85

10% Tolerance, 85ns

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245Y-100

10% Tolerance, 100ns

0 pin;

Use pkgcode/variation: MDT32-6*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245Y-70+

0 pin;

Use pkgcode/variation: MDT32+6*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245Y-120+

0 pin;

Use pkgcode/variation: MDT32+6*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245Y-85+

0 pin;

Use pkgcode/variation: MDT32+6*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245Y-100+

0 pin;

Use pkgcode/variation: MDT32+6*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245Y-70IND+

0 pin;

Use pkgcode/variation: MDT32+6*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245Y-120IND

10% Tolerance, 120ns

0 pin;

Use pkgcode/variation: MDT32-6*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

DS1245Y-120IND+

0 pin;

Use pkgcode/variation: MDT32+6*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245Y-70IND

10% Tolerance, 70ns

0 pin;

Use pkgcode/variation: MDT32-6*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

DS1245YP-100

10% Tolerance, 100ns

0 pin;

Use pkgcode/variation: PC2-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245YP-70

10% Tolerance, 70ns

0 pin;

Use pkgcode/variation: PC2-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

DS1245YP-100+

0 pin;

Use pkgcode/variation: PC2+3*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245YP-70+

0 pin;

Use pkgcode/variation: PC2+3*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

DS1245YP-70IND

10% Tolerance, 70ns

0 pin;

Use pkgcode/variation: PC2-3*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

DS1245YP-70IND+

0 pin;

Use pkgcode/variation: PC2+3*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis