BQ2204ASNTR

Overview

The BQ2204ASNTR is an X4 SRAM Nonvolatile Controller Unit manufactured by Texas Instruments. It provides functions for converting up to four banks of standard CMOS SRAM into nonvolatile memory. The device operates within a supply voltage range of 4.5V to 5.5V and supports surface mount installation in a 16-SOIC package. It is designed for battery-powered applications requiring data retention.

Feature Summary

• Converts multiple standard CMOS SRAM banks into nonvolatile memory
• Supports operation with lithium-ion or lithium-polymer battery sources
• Integrates charge pump circuitry for internal voltage generation

Applications

• Battery-powered portable electronic devices
• Data logging systems requiring persistent storage
• Industrial control units with memory backup needs

Procurement Notes

Verify the specific suffix 'SNTR' corresponds to the 16-SOIC tape-and-reel packaging configuration. Confirm RoHS3 compliance status for current production lots. Check for any Product Change Notifications regarding pinout or electrical parameter updates before finalizing design integration.

Selection Notes

Select this component when designing systems that require nonvolatile memory expansion using standard SRAM chips. Ensure the host system provides a stable 4.5V to 5.5V supply rail. Verify that the required number of SRAM banks does not exceed the controller's four-bank capacity limit.

Part Context

This part belongs to the BQ2204 family of nonvolatile memory controllers. It serves as a bridge between volatile SRAM and battery backup systems, eliminating the need for complex external charging circuits for the memory cells.

Replacement Considerations

Public confirmed substitute: BQ2204A (Generic family designation). Note that BQ2204ESNTR is listed as a recommended alternative but serves a different function (battery management) and is not electrically compatible.