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X4 SRAM Nonvolatile Controller Unit

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BQ2204APN General Description

The CMOS bq2204A SRAM Non-volatile Controller Unit provides all necessary functions for converting up to four banks of standard CMOS SRAM into nonvolatile read/write memory.

A precision comparator monitors the 5V VCC input for an out-of-tolerance condi-tion. When out-of-tolerance is detected, the four conditioned chip-enable outputs are forced inactive to write-protect up to four banks of SRAM.

During a power failure, the external SRAMs are switched from the VCC supply to one of two 3V backup sup-plies. On a subsequent power-up, the SRAMs are write-protected until a power-valid condition exists.

During power-valid operation, a two-input decoder transparently selects one of up to four banks of SRAM.


Key Features

  • Power monitoring and switching for 3-volt battery-backup applications
  • Write-protect control
  • 2-input decoder for control of up to 4 banks of SRAM
  • 3-volt primary cell inputs
  • Less than 10ns chip-enable propagation delay
  • 5% or 10% supply operation


Vin (max) (V) 5.5 Features 4-Bank SRAM, CMOS, Non-volatile controller, Write-protection
Device type Memory device Operating temperature range (°C) -40 to 85, 0 to 70
Rating Catalog Communication interface No interface
Operating current (typ) (µA) 3000 feature-type
feature-battery-type feature-process-technology
feature-maximum-supply-current-ma feature-minimum-operating-supply-voltage-v
feature-maximum-operating-supply-voltage-v feature-output-voltage-v
feature-output-current-ma feature-maximum-power-dissipation-mw
feature-packaging Tube feature-rad-hard
feature-pin-count 16 feature-supplier-package PDIP
feature-standard-package-name DIP feature-cecc-qualified No
feature-esd-protection feature-military No
feature-aec-qualified No feature-aec-qualified-number
feature-eccn-code EAR99 feature-svhc No
feature-svhc-exceeds-threshold No

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Ratings and Reviews

C**b 05/22/2021

Diodes switch first quickly, and then switch to a slow smooth mode, and so on cycle. In the description they are fast. Therefore, only 4 stars. Delivery is extremely slow. in tula, no longer hoped to receive.



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Availability: 7170 PCS

Qty. Unit Price(USD) Ext. Price
1+ $24.189 $24.19
200+ $9.361 $1,872.20
500+ $9.032 $4,516.00
1000+ $8.870 $8,870.00

The prices below are for reference only.