AT45DQ321-SHFHB-B

Memory IC Overview

The AT45DQ321-SHFHB-B is a 32 Mbit DataFlash memory device manufactured by Renesas Electronics Corporation. It operates on a single 2.3 V to 3.6 V supply and supports SPI modes 0 and 3, including Dual I/O and Quad I/O interfaces with RapidS operation. The component features an advanced dual SRAM buffer architecture for efficient data logging and includes comprehensive security features. It is housed in an 8-SOIC package and supports byte-write operations for Serial EEPROM functionality.

Memory IC Feature Summary

• Advanced dual SRAM buffer architecture designed for maximum flexibility and efficient data logging
• Supports Single, Dual, and Quad I/O SPI interfaces with RapidS operation capability
• Byte-write functionality provides Serial EEPROM capabilities within a Serial NOR Flash device
• Comprehensive security and unique ID features protect the device from outside tampering

Memory IC Applications

• Smart home human-machine interface (HMI) systems
• Industrial data logging applications
• Consumer electronics requiring secure code storage

Memory IC Procurement Notes

Verify the specific suffix HB against official Renesas documentation to confirm temperature range and packaging details. Ensure compatibility with existing SPI controller configurations supporting Dual or Quad modes. Check for RoHS3 compliance status relevant to your region. Confirm lead times and availability through authorized distributors as stock levels fluctuate.

Memory IC Selection Notes

Select this component when high-speed data logging with low processor overhead is required. The dual SRAM buffers allow seamless data transfer between flash and host. Choose this part over standard NOR flash if EEPROM-like byte-write capabilities are needed without additional hardware. Ensure the system voltage falls within the 2.3 V to 3.6 V operating range.

Memory IC Part Context

This part belongs to the AT45DQ321 DataFlash family, which integrates flash memory with SRAM buffers. It is designed for applications demanding high reliability and fast write speeds. The SHFHB variant specifically denotes the 8-SOIC package with extended temperature range capabilities compared to standard commercial grade versions.

Memory IC Replacement Considerations

AT45DQ321-SHF-B is listed as a similar alternative. Verify pinout and electrical specifications before substitution. Ensure the replacement supports the required Quad I/O mode if utilized in the original design.