Microchip Technology 23LCV02M-I/P

Overview

23LCV02M-I/P from Microchip Technology is a 2-Mbit serial SRAM with external battery backup support, SPI/SDI/SQI interface, 143 MHz max clock frequency, 2.2V–3.6V VCC range, and industrial temperature rating (–40°C to +85°C). It delivers zero write time, unlimited read/write cycles, and on-chip ECC for data integrity in power-constrained embedded systems requiring non-volatile RAM retention.

For engineers reviewing the 23LCV02M-I/P datasheet, 23LCV02M-I/P pinout, 23LCV02M-I/P application, or 23LCV02M-I/P equivalent, key selection criteria include VBAT-enabled data retention during main supply dropout, quad-mode throughput scalability, page/sequential access flexibility, and 14-lead TSSOP/SOIC/PDIP package compatibility with hold functionality and configurable drive strength/slew rate.

Technical Context

The 23LCV02M-I/P implements a tri-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 architecture includes a 256 × 8-bit memory array, user-selectable 32-byte or 256-byte page size, and STATUS register control of output drive (8 levels), slew rate (4 settings), and protocol state.

Power management integrates VBAT switchover at 1.75–1.95 V (VTRIP), retaining both SRAM contents and STATUS register settings during VCC brownout. Built-in ECC logic detects and corrects single-bit errors per read operation, with latched ECS bit indicating correction event history without interrupt overhead.

Key Specifications

Pinout & Package

23LCV02M-I/P is available exclusively in 14-lead PDIP, SOIC, and TSSOP packages. Pin 10 is dedicated VBAT; pins 5–9 and 10 are NC in 14-lead variants. The device requires no external pull-ups on SIO lines when configured for SQI/SDI due to internal driver control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14V104N-SP25XI and FM24V02A-G, the 23LCV02M-I/P uniquely combines VBAT-backed retention, on-chip ECC, and tri-mode interface scalability - making it optimal for systems requiring guaranteed data survival across extended power interruptions and robustness against soft errors.

Availability

23LCV02M-I/P is available at Aetrix Electronics and suitable for industrial data loggers, medical sensor hubs, smart meter firmware caches, and POS terminal transaction buffers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 23LCV02M-I/P 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 leading provider of microcontroller, analog, FPGA, and memory solutions, serving automotive, industrial, communications, and consumer markets with vertically integrated silicon and development tools.

The 23LCV02M-I/P belongs to Microchip's 23XX02M serial SRAM family, designed specifically for embedded systems needing battery-backed, high-speed, low-voltage memory with flexible interface options and hardware-level reliability features.

FAQ

What is the function of the VBAT pin on the 23LCV02M-I/P?

The VBAT pin on the 23LCV02M-I/P provides an external backup power source to maintain SRAM data and STATUS register contents when main VCC drops below the VTRIP threshold (1.75–1.95 V). During VCC brownout, the device automatically switches to VBAT, preserving memory integrity without host intervention. When VCC is restored, VBAT is disconnected and normal operation resumes. This enables true non-volatile behavior without external controllers or capacitors.

Does the 23LCV02M-I/P support both SPI mode 0 and mode 3?

Yes, the 23LCV02M-I/P supports both SPI mode 0 (CPOL = 0, CPHA = 0) and mode 3 (CPOL = 1, CPHA = 1) for backward compatibility with legacy controllers. In both modes, data are sampled on the rising edge of SCK and output on the falling edge. Mode selection is determined by the host controller's clock polarity and phase configuration - no device-side configuration is required. The default power-on state is SPI mode.

How does the HOLD pin operate on the 23LCV02M-I/P?

The HOLD pin on the 23LCV02M-I/P pauses active serial transfers without resetting the internal address counter or command state. Hold activation requires CS to be low and the HOLD signal to fall while SCK is low; exit occurs on HOLD rise coinciding with SCK low. SO transitions to high-Z within one SCK cycle, allowing the host to service interrupts. HOLD is functional only in SPI and SDI modes - in SQI mode, this pin becomes SIO3.

What page sizes are supported by the 23LCV02M-I/P, and how are they selected?

The 23LCV02M-I/P supports two page sizes: 32 bytes and 256 bytes. Selection is controlled by bit 8 (PAGE SIZE) in the STATUS register - '0' configures 32-byte pages (8,192 total), '1' configures 256-byte pages (1,024 total). This setting affects Page Read/Write operations only and persists across power cycles. The default at power-up is 32-byte pages, but it can be changed dynamically via WRSR command without interrupting ongoing operations.

Is Error Correction Code (ECC) enabled by default on the 23LCV02M-I/P?

ECC is always active on the 23LCV02M-I/P during read operations and requires no configuration. The on-chip ECC logic automatically detects and corrects single-bit errors in retrieved data. Its status is reported via the ECS (Error Correction State) bit in the STATUS register: '1' indicates the previous read triggered correction, '0' means no error was detected or corrected. This latched flag allows firmware to log or respond to memory integrity events without performance penalty.