The DS1213B SmartSocket is a 28-pin, 600mil DIP socket with a built-in CMOS controller circuit and an embedded lithium energy source.
$12.55
DS1213B ; Controller Type. Smartsocket SRAM ; Voltage - Supply. 4.75V ~ 5.5V ; Operating Temperature. 0°C ~ 70°C ; Mounting Type. Through Hole ; Package / Case. 28- ...
The DS1213 SmartSocket products have reached end of life, and can be replaced using a pin-compatible, equivalent-density 5V NV SRAM module product.