The CMOS bq4011 is a nonvolatile 262,144-bit static RAM organized as 32,768 words by 8 bits. It features data retention in the absence of power, automatic write-protection during power-up/power-down cycles, and an industry-standard 28-pin 32K x 8 pinout.
The CMOS bq4011 is a nonvolatile static RAM organized as 32,768 words by 8 bits. It combines the unlimited write cycles of standard SRAM with reliable nonvolatility provided by integral control circuitry and an internal lithium energy source.
The device automatically protects memory contents during power-up and power-down cycles. When the supply voltage falls out of tolerance, the SRAM is unconditionally write-protected to prevent inadvertent writes. An internal lithium coin cell sustains data retention until valid power is restored.
| Memory Organization | 32,768 words by 8 bits |
|---|---|
| Data Retention (No Power) | 10 years minimum |
| Operating Temperature (Commercial) | -40°C to +70°C |
The device provides a minimum of 10 years of data retention in the absence of power.
The SRAM automatically enters write-protection mode to prevent data corruption during power cycles.
No, the bq4011 requires no external circuitry and is socket-compatible with industry-standard SRAMs.