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23LCV1024-I/ST

MCHP23LCV1024-I/ST

Microchip Technology
SRAM - Synchronous Memory IC 1Mbit SPI - Dual I/O 20 MHz 8-TSSOP
Active1,907 in stock
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Overview

The 23LCV1024-I/ST is a 1 Mbit Serial SRAM from Microchip Technology that provides high-speed volatile memory via a standard SPI or Dual SPI (SDI) interface. It is specifically designed to function as a battery-backed SRAM, featuring a dedicated VBAT pin that automatically switches to an external battery source to maintain data when the primary VDD supply is lost. Operating at up to 20 MHz, it offers unlimited read and write cycles without the endurance limitations or write-latency issues common to Flash or EEPROM.

Why Choose This Part

This device combines the simplicity of a serial interface with the unlimited endurance of SRAM, operating across a wide 2.5V to 5.5V supply range. The integrated battery backup switchover circuitry simplifies hardware design for non-volatile storage needs, and the Dual I/O mode doubles the effective data rate for performance-critical applications.

Applications

Battery-Backed Data Logging
Uses the VBAT pin to preserve sensor data and system logs during power outages without needing a secondary controller.
Audio Buffering
Provides high-speed temporary storage for digital audio streams where zero-latency writes are critical.
Microcontroller RAM Extension
Adds 128KB of workspace to memory-constrained MCUs for large lookup tables or display frame buffers.
Scratchpad Memory
Ideal for frequently updated variables in industrial control systems where EEPROM wear-out is a concern.

Key Specifications

Technology SRAM - Synchronous
Memory Size 1Mbit
Memory Type Volatile
Memory Format SRAM
Mounting Type Surface Mount
Package / Case 8-TSSOP (0.173", 4.40mm Width)
Clock Frequency 20 MHz
Memory Interface SPI - Dual I/O
Voltage - Supply 2.5V ~ 5.5V
Memory Organization 128K x 8
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 8-TSSOP

Getting Started

Connect the device to an MCU SPI bus (CS, SCK, SI, SO) and provide a 3V coin cell to the VBAT pin for data retention. Use standard SPI read and write commands (0x03 and 0x02) to access the 128KB address space. Microchip provides the MPLAB XC8/XC16 compilers and peripheral libraries that support SPI communication for rapid integration.

23LCV1024-I/ Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
23LCV1024-I/ST (this part) TSSOP-8 1,907
23LCV1024-I/SN SOIC-8 12,030

Also Consider

23LC1024-I/ST MCHPMicrochip Technology - A standard 1Mbit Serial SRAM version for applications that do not require the integrated battery backup switchover functionality.
CY14B101Q2A-SXIT Infineon (Cypress) - An nvSRAM alternative that automatically backs up data to internal non-volatile cells on power-down without an external battery.