25AA640X-I/ST

$0.78

Description：IC EEPROM 64KBIT SPI 1MHZ 8TSSOP
Series：-
Mfr：Microchip Technology
Package：Tube

SKU:4f18a644fecf Category: Memory IC Brand: Microchip Technology

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Product introduction

25AA640X-I/ST is listed in the Memory IC range at ChipApex. The manufacturer field lists Microchip Technology. Its product description is IC EEPROM 64KBIT SPI 1MHZ 8TSSOP. Review the specifications below when checking this part for your BOM.

Memory IC specifications for 25AA640X-I/ST

Description：IC EEPROM 64KBIT SPI 1MHZ 8TSSOP
Series：-
Mfr：Microchip Technology
Package：Tube
Memory Type：Non-Volatile
Memory Format：EEPROM
Technology：EEPROM
Memory Size：64Kbit
Memory Organization：8K x 8
Memory Interface：SPI
Clock Frequency：1 MHz
Write Cycle Time - Word, Page：5ms
Voltage - Supply：1.8V ~ 5.5V
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package：8-TSSOP
Access Time：-
Grade：-
Qualification：-

Memory IC datasheet and documents for 25AA640X-I/ST

25AA640X-I/ST

Memory IC Overview

The Microchip Technology 25AA640X-I/ST is a 64 Kbit (8192 x 8 bit) Serial Electrically Erasable PROM. It features an SPI-compatible serial bus interface with SCK, SI, SO, and CS signals. The device supports a maximum clock frequency of 1 MHz at VCC = 1.8V to 5.5V. Operating voltage ranges from 1.8V to 5.5V. It includes block write protection, self-timed erase/write cycles, and data retention exceeding 200 years. Endurance is rated for 1 million write/erase cycles. The component operates within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

Supports SPI-compatible serial communication with separate data in and out lines.
Includes hardware write-protect pin and software-configurable block protection levels.
Features built-in power-on/off data protection circuitry and write enable latch.

Memory IC Applications

Microcontroller system data storage
Configuration parameter retention
Calibration value storage

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature range (-40°C to +85°C). Confirm the package type matches the required PCB footprint, as this part number indicates TSSOP packaging. Ensure the design accounts for the 1 MHz maximum clock speed at the lowest operating voltage of 1.8V. Check datasheet revision history for any pinout or electrical characteristic updates.

Memory IC Selection Notes

Select this component when low-power non-volatile storage is required for small datasets. It is suitable for systems utilizing standard SPI interfaces without dedicated I2C controllers. Consider the page write limit of 32 bytes when designing write algorithms. Verify that the host microcontroller can support the required voltage levels for reliable communication across the full operating range.

Memory IC Part Context

This device belongs to the 25XX640 family of serial EEPROMs from Microchip Technology. It shares functional similarities with the 25LC640 but differs in minimum operating voltage specifications. The datasheet notes it is not recommended for new designs, suggesting the use of updated variants like the 25AA640A or 25LC640A for future projects.