DS1213C
SmartSocket 256k
www.dalsemi.com
FEATURES
Accepts standard 32K x 8 CMOS static
RAMs
Embedded lithium energy cell retains RAM
data
Self-contained circuitry safeguards data
Data retention time is greater than 10 years
with the proper RAM selection
Proven gas-tight socket contacts
Operating temperature range 0°C to 70°C
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
GND 14
28
V
CC
27
26
25
24
23
22
21
20
CE
19
18
17
16
15
28-Pin Intelligent Socket
PIN DESCRIPTION
– Conditioned Chip Enable
– Switched V
CC
V
CC
GND
– Ground
All pins pass through except 20 and 28.
CE
DESCRIPTION
The DS1213C SmartSocket is a 28-pin, 600 mil DIP socket with a built-in CMOS controller circuit and
an embedded lithium energy source. It accepts a 32K x 8 JEDEC bytewide CMOS static RAM. When the
socket is mated with a CMOS RAM, it provides a complete solution o problems associated with memory
volatility. The SmartSocket monitors incoming V
CC
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 SmartSocket saves printed circuit board space since the SRAM/SmartSocket combination
occupies no more area than the memory alone. The SmartSocket uses only Pins 20 and 28 for RAM
control. All other pins are passed straight through.
See the DS1213B SmartSocket data sheet for technical details.
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022900
DALLAS [ DALLAS SEMICONDUCTOR ]
