25AA160D-I/ST

Memory IC Overview

The Microchip Technology 25AA160D-I/ST is a 16 Kbit Serial Electrically Erasable PROM featuring a 2048 x 8-bit organization and 32-byte page size. It operates via an SPI-compatible serial bus with a maximum clock frequency of 10 MHz at VCC ≥ 4.5V, scaling to 3 MHz at 1.8V ≤ VCC < 2.5V. The device supports a supply voltage range of 1.8V to 5.5V and functions within an industrial temperature range of -40°C to +85°C. Key electrical characteristics include a standby current of 5 µA at 5.5V and a write cycle time of 5 ms max.

Memory IC Feature Summary

• Supports hardware write protection via the WP pin and STATUS register bits for array security
• Includes built-in power-on/off data protection circuitry and a write enable latch
• Allows communication pausing through the HOLD pin without resetting the serial sequence

Memory IC Applications

• Microcontroller system data storage
• Configuration parameter retention
• Calibration value storage

Memory IC Procurement Notes

Verify the specific suffix 'I/ST' confirms the Industrial temperature grade (-40°C to +85°C) and TSSOP-8 package type. Confirm RoHS compliance status as required by your assembly specifications. Ensure the design accounts for the 32-byte page write limitation to prevent data wrapping across physical page boundaries during programming operations.

Memory IC Selection Notes

Select this component when low-voltage operation down to 1.8V is required alongside standard SPI interface compatibility. The 'D' variant provides a larger 32-byte page buffer compared to the 16-byte 'C' version, improving write efficiency for larger data blocks. Verify that the host microcontroller can support the necessary clock frequencies for the target supply voltage.

Memory IC Part Context

This part belongs to the 25XX160C/D family of 16 Kbit Serial EEPROMs from Microchip Technology. It shares architectural similarities with the 25LC160D series but differs in minimum operating voltage requirements. The device utilizes an 8-pin TSSOP package and interfaces directly with popular microcontroller families including PIC devices.

Memory IC Replacement Considerations

The 25AA160C-I/ST offers identical functionality but with a reduced 16-byte page size instead of 32 bytes. The 25LC160D-I/ST serves as a functional equivalent but requires a minimum supply voltage of 2.5V rather than 1.8V.