Maxim Integrated DS1220AB
The DS1220AB and DS1220AD 16k Nonvolatile SRAMs are 16,384-bit, fully static, nonvolatile SRAMs organized as 2048 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.| Part No. | DS1220AB |
|---|---|
| Datasheet | DS1220AB Download |
| Manufacturer |  Maxim Integrated |
| Description | 16k Nonvolatile SRAM |
| Buy | Stock & Price |
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 of 100 ns
● 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 DS1220AB/AD 16k Nonvolatile SRAM PIN ASSIGNMENT A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 VCC 23 A8 22 A9 21 WE 20 OE 19 A10 18 CE 17 DQ7 16 DQ6 15 DQ5 14 DQ4 13 DQ3 24-Pin ENCAPSULATED PACKAGE 720-mil EXTENDED PIN
DESCRIPTION
A0-A10 DQ0-DQ7 - Address Inputs - Data In/Data Out CE - Chip Enable WE - Write Enable OE VCC GND - Output Enable - Power (+5V) - GroundDESCRIPTION
The NV SRAMs can be used in place of existing 2k x 8 SRAMs directly conforming to the popular bytewide 24-pin DIP standard.
