Microchip Technology 23LCV02M-I/ST

Overview

23LCV02M-I/ST from Microchip Technology is a 2-Mbit serial SRAM with SPI/SDI/SQI interface, 143 MHz max clock frequency, 2.2–3.6 V supply range, industrial temperature rating (–40°C to +85°C), and integrated VBAT pin for external battery backup. It delivers zero write time, unlimited read/write cycles, and on-chip ECC for data integrity in real-time logging systems.

For engineers reviewing the 23LCV02M-I/ST datasheet, 23LCV02M-I/ST pinout, 23LCV02M-I/ST application, or 23LCV02M-I/ST equivalent, this device supports high-speed memory expansion in space-constrained embedded controllers where non-volatile retention during main power loss is required via external backup supply.

Technical Context

The 23LCV02M-I/ST implements a triple-mode serial interface-SPI (mode 0/3), SDI (2-bit multiplexed I/O), and SQI (4-bit multiplexed I/O)-with automatic mode reset via RSTIO command. Its internal address counter supports byte, page (32/256 B), and sequential read/write operations without wrap-around restrictions.

It integrates a configurable STATUS register controlling output drive strength (8 levels), slew rate (4 settings), page size selection, and ECC status latching. The VBAT pin enables seamless switchover at 1.75–1.95 V trip point, retaining both RAM contents and STATUS register settings during VCC brownout.

Key Specifications

Pinout & Package

23LCV02M-I/ST is packaged in 14-lead SOIC (ST suffix), with 6 NC pins (pins 5–9) and dedicated VBAT (pin 10). Pin functions are validated per Microchip DS20006861A.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial SRAM applications.

Compared with 23AA02M-I/ST, the 23LCV02M-I/ST adds VBAT retention and 143 MHz SQI performance at the cost of 14-pin packaging; compared with FM25V20A-G, it trades F-RAM's infinite endurance for higher speed, ECC protection, and true SRAM timing predictability.

Availability

23LCV02M-I/ST is available at Aetrix Electronics and suitable for smart metering, automotive event recording, industrial PLC configuration storage, medical infusion pump runtime buffering, and battery-backed data acquisition requiring stable component supply across long production lifecycles.

Supply support for 23LCV02M-I/ST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.

The 23LCV02M-I/ST belongs to Microchip's 23XX02M serial SRAM product line, designed specifically for high-reliability, battery-backed memory expansion in resource-constrained industrial and automotive systems requiring fast, ECC-protected, and pin-efficient serial interfaces.

FAQ

What is the maximum clock frequency supported by the 23LCV02M-I/ST in SQI mode?

The 23LCV02M-I/ST supports up to 143 MHz in SQI mode, as specified in Table 1-3 of DS20006861A. This enables quad-data-rate transfers achieving effective throughput of ~572 MB/s, significantly exceeding standard SPI limits. The 23LCV02M-I/ST achieves this with strict AC timing requirements including ≤0.1 ns clock rise/fall times and sub-3 ns setup/hold windows.

Does the 23LCV02M-I/ST require external hardware for VBAT switchover?

No, the 23LCV02M-I/ST includes fully integrated VBAT switchover circuitry with a factory-trimmed 1.75–1.95 V trip point (VTRIP). When VCC drops below VTRIP, the device automatically routes power from the VBAT pin to maintain SRAM and STATUS register state without external diodes, regulators, or supervision ICs. The 23LCV02M-I/ST retains data down to 1.0 V on VBAT per DC characteristic D011.

How does the ECC functionality work in the 23LCV02M-I/ST?

The 23LCV02M-I/ST implements on-chip ECC logic that automatically detects and corrects single-bit errors during every read operation. The Error Correction State (ECS) bit in the STATUS register (bit 13) latches '1' if correction was applied on the prior read. This occurs transparently - no host intervention or additional commands are needed. The 23LCV02M-I/ST does not support double-bit error detection or correction.

Can the 23LCV02M-I/ST operate in SPI mode without configuring the STATUS register?

Yes, the 23LCV02M-I/ST defaults to SPI mode (PROT = 00) after power-on reset, requiring no STATUS register writes to begin basic read/write operations. All standard SPI instructions (0x03 READ, 0x02 WRITE) function immediately. Configuration of page size, drive strength, or slew rate is optional and only needed for advanced optimization - the 23LCV02M-I/ST remains fully functional in default SPI mode.

What package type does the 'ST' suffix indicate for the 23LCV02M-I/ST?

The 'ST' suffix in 23LCV02M-I/ST denotes a 14-lead Small Outline Integrated Circuit (SOIC) package, 3.9 mm wide, with standard gull-wing leads. Per Microchip's Device Selection Table, 23LCV02M is exclusively offered in 14-lead packages (PDIP, SOIC, TSSOP), distinguishing it from the 8-lead-only 23AA02M. The 23LCV02M-I/ST has six NC pins (5–9) and dedicated VBAT (pin 10).