DS1213B

Series: -
Operating Temperature: 0°C ~ 70°C
Packaging: Tube
Manufacturer: Maxim Integrated Products
Voltage - Supply: 4.75 V ~ 5.5 V
Controller Type: Smartsocket SRAM
Package / Case: 28-DIP (0.600", 15.24mm)
Supplier Device Package: 28-PDIP


Features:

 Accepts standard 2K x 8 or 8K x 8 CMO static RAMs
  Embedded lithium energy cell retains RAM data
  Self-contained circuitry safeguards data
  Data retention time is greater than 10 years with proper RAM selection
  IC socket permits upgrading from 2K x 8 to 8K RAM
  Proven gas-tight socket contacts
  Operating temperature range 0°C to 70°C


Pinout




Specifications

Voltage on Any Pin Relative to Ground               -0.3V to +7.0V
Operating Temperature                                      0°C to 70°C
Storage Temperature                                         -40°C to +70°C
Soldering Temperature                                       260°C for 10 seconds


Description

The DS1213B SmartSocket is a 28-pin, 600 mil DIP socket with a built-in CMOS controller circuit and an embedded lithium energy source. DS1213B accepts either 24-pin 2K x 8 (lower-justified) or 28-pin 8K x 8 JEDEC bytewide CMOS static RAM. When the socket is mated with a CMOS RAM, it provides a complete solution to problems associated with memory volatility. The DS1213B monitors incoming VCC for an out-of-tolerance condition. When such a condition occurs, the internal lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent data corruption.

Using the DS1213B saves printed circuit board space since the SRAM/SmartSocket combination occupies no more area than the SRAM alone. The SmartSocket modifies only pins 20, 26 and 28, to nonvolatize the RAM. All other pins are passed straight through.