23LCV1024T-E/ST

Memory IC Overview

The Microchip Technology 23LCV1024T-E/ST is a 1 Mbit Serial Static Random Access Memory (SRAM) device. It features an SPI-compatible bus interface with support for SDI (Serial Dual Interface) mode, allowing data rates up to 20 MHz. The memory organization is 128K x 8 bits. It operates within a supply voltage range of 2.5 V to 5.5 V and supports industrial temperature ranges from -40°C to +125°C. The device includes external battery backup support via the VBAT pin to maintain data retention when the main power supply drops below the trip point.

Memory IC Feature Summary

• Supports unlimited read and write cycles without wear-out limitations typical of flash memory.
• Provides zero write time by eliminating the erase-before-write requirement found in EEPROM technologies.
• Enables data preservation during power loss through an internal switch connecting to an external battery or coin cell on the VBAT pin.

Memory IC Applications

• Data logging systems requiring frequent updates without endurance limits.
• Real-time clock (RTC) backup memory for maintaining system state during power outages.
• Configuration storage in embedded microcontroller applications needing fast access speeds.

Memory IC Procurement Notes

Verify that the 'E' suffix denotes the extended industrial temperature range (-40°C to +125°C), as this differs from the standard 'I' grade. Confirm the '/ST' package designation corresponds to the 8-lead TSSOP form factor required for your PCB layout. Ensure compatibility with your system's SPI controller regarding voltage levels and clock polarity settings before finalizing procurement.

Memory IC Selection Notes

Select this component when high-speed random access and infinite endurance are prioritized over non-volatility. It serves as a suitable alternative to EEPROM where write latency and cycle life are critical constraints. Consider the SDI mode capability if higher throughput is needed compared to standard single-line SPI interfaces. Evaluate the need for external battery circuitry to utilize the VBAT feature effectively.

Memory IC Part Context

This part belongs to the 23LCV1024 family of serial SRAM devices manufactured by Microchip Technology. The family shares core architectural features but varies in temperature grades and packaging options. The 'V' indicates low-power CMOS technology, while the '1024' specifies the 1 Mbit capacity. This specific variant integrates the extended temperature rating and surface-mount TSSOP packaging.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include 23LC1024T-I/ST and 23LCV1024-I/ST. Verify that replacement parts match the required temperature range and package dimensions. Note that some variants may lack the dual I/O (SDI) support or have different electrical characteristics regarding standby current.