25AA160-I/SN

Memory IC Overview

The Microchip Technology 25AA160-I/SN is a 16 Kbit (2048 x 8-bit) Serial Electrically Erasable PROM housed in an 8-lead SOIC package. It operates within a voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 1 MHz. The device features industrial temperature coverage from -40°C to +85°C, with typical standby current of 500 nA and read current of 500 µA. It utilizes a standard SPI interface for data access.

Memory IC Feature Summary

• Supports block write protection allowing selection of none, one-quarter, one-half, or all array segments.
• Includes built-in power on/off data protection circuitry and a write enable latch mechanism.
• Features a dedicated hold pin to pause serial communication without resetting the sequence.

Memory IC Applications

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

Memory IC Procurement Notes

Verify the specific suffix 'I/SN' corresponds to the Industrial temperature range (-40°C to +85°C) and the 8-lead Plastic Small Outline (SN) package. Confirm that the 1.8V operating voltage requirement aligns with the target system's supply rails. Check for any manufacturer change notifications regarding this legacy component.

Memory IC Selection Notes

This component is designated as not recommended for new designs. Engineers should evaluate the 25AA160A/B or 25LC160A/B series for updated specifications and availability. Ensure the 1 MHz clock speed meets the system timing requirements compared to higher-speed alternatives.

Memory IC Part Context

The 25AA160 belongs to the 25XX160 family of 16 Kbit Serial EEPROMs. It interfaces directly with SPI ports found in popular microcontroller families. The device architecture includes page latches and a high-voltage generator for internal programming operations.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include 25AA160A/I-SN and 25LC160B-I/SN. Verify compatibility with existing firmware instruction sets when migrating between these variants.

Memory IC FAQ

How does the Hold pin function during serial communication?

The Hold pin suspends transmission mid-sequence without requiring retransmission. It must be held low while SCK is low to pause, tri-stating the SO line until brought high again.

What is the purpose of the Write Protect (WP) pin?

The WP pin prohibits writes to nonvolatile bits in the Status register when low and WPEN is high. When high, all functions including Status register writes operate normally.