23LCV1024T-I/ST

Memory IC Overview

The Microchip Technology 23LCV1024T-I/ST is a 1 Mbit (128K x 8) Serial SRAM device housed in an 8-lead TSSOP package. It operates within a supply voltage range of 2.5V to 5.5V and supports industrial temperatures from -40°C to +85°C. The component utilizes a SPI-compatible interface with a maximum clock frequency of 20 MHz and includes support for SDI mode. Key electrical characteristics include a read current of 3 mA at 5.5V and 20 MHz, and a standby current of 4 µA at +85°C.

Memory IC Feature Summary

• Supports external battery backup via VBAT pin to maintain data when VCC drops below trip point
• Enables dual I/O access through SDI mode for increased data throughput
• Provides unlimited read and write cycles with zero write time
• Offers Byte, Page, and Sequential operation modes for flexible memory access

Memory IC Applications

• Data logging systems requiring non-volatile-like retention without flash wear
• Microcontroller-based applications needing fast random access memory
• Industrial control units operating in extended temperature environments
• Embedded systems utilizing SPI interfaces for low-pin-count memory expansion

Memory IC Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging configuration as distinct from tube variants. Confirm the 'I' designation corresponds to the industrial temperature range (-40°C to +85°C). Ensure compatibility with the 8-TSSOP footprint dimensions during PCB layout. Cross-reference the datasheet revision DS25156A for any updates regarding electrical characteristics or pin definitions prior to final procurement.

Memory IC Selection Notes

Select this component when a 1 Mbit capacity is required with SPI connectivity. Choose this variant over standard 23LC1024 if lower voltage operation down to 2.5V is necessary. Consider the integrated battery backup feature if system power interruptions are anticipated. Verify that the host microcontroller supports the required SPI modes and clock speeds up to 20 MHz.

Memory IC Part Context

This part belongs to the 23LCV1024 family of serial SRAM devices manufactured by Microchip Technology. It shares functional similarities with the 23LC1024 but offers a wider voltage range starting at 2.5V. The device is designed to interface directly with popular microcontroller families, including PIC® microcontrollers, providing a reliable storage solution for volatile data applications.

Memory IC Replacement Considerations

The 23LC1024T-I/ST serves as a direct functional substitute, differing primarily in the minimum supply voltage specification. Other compatible alternatives within the same package and interface specifications should be evaluated based on voltage range requirements and availability.

Memory IC FAQ

How does the device handle data retention during power loss?

The 23LCV1024 features an internal switch that automatically transfers power to the SRAM array from the VBAT pin when VCC falls below the trip point, maintaining data integrity.

What is the purpose of the NC pin in the TSSOP package?

Pin 3 is designated as No Connect (NC) and should remain unconnected in the circuit design.

Can the device operate in both SPI and SDI modes simultaneously?

No, the device operates in either standard SPI mode or SDI (Serial Dual Interface) mode, which must be selected via specific instruction commands.