Microchip Technology 23LCV04M-I/P

Overview

23LCV04M-I/P from Microchip Technology is a 4,096-Kbit serial SRAM with external battery backup support, SPI/SDI/SQI interface compatibility, 143 MHz max clock frequency, 2.2V–3.6V supply range, and industrial temperature rating (–40°C to +85°C). It serves as non-volatile data buffer in power-loss-critical embedded systems requiring zero write time and unlimited read/write endurance.

For engineers reviewing the 23LCV04M-I/P datasheet, 23LCV04M-I/P pinout, 23LCV04M-I/P application, or 23LCV04M-I/P equivalent, key selection factors include VBAT-supported data retention, configurable page size (32/256 bytes), ECC-enabled reliability, quad-mode throughput scalability, and 14-lead TSSOP/PDIP/SOIC package compatibility.

Technical Context

The 23LCV04M-I/P implements a triple-mode serial interface-SPI (mode 0/3), SDI (dual I/O), and SQI (quad I/O)-with automatic mode reset via RSTIO command. Its internal ECC logic detects and corrects single-bit errors during reads, latching correction status in the STATUS register's ECS bit.

Power management includes automatic VCC-to-VBAT switchover at 1.75–1.95 V (VTRIP), retaining both SRAM contents and STATUS register settings. The device supports byte/page/sequential access modes, user-selectable output drive strength (8 levels) and slew rate (4 settings), all configured via writable STATUS register bits.

Key Specifications

Pinout & Package

23LCV04M-I/P is supplied in 14-lead PDIP, SOIC, and TSSOP packages. Pin numbering follows standard Microchip 14-lead layout with NC pins occupying positions 5–9 and VBAT at pin 10.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 23LCV04M-I/P, 23AA04M-I/P omits VBAT and uses fewer pins but supports lower voltage operation, while FM25V05-G trades speed and interface flexibility for intrinsic non-volatility and extreme write endurance - making each suitable for distinct system-level trade-offs.

Availability

23LCV04M-I/P is available at Aetrix Electronics and suitable for industrial data loggers, medical sensor hubs, smart energy meters, and automotive telematics units requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for 23LCV04M-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.

The 23LCV04M belongs to Microchip's serial SRAM product line, designed specifically for systems needing fast, reliable, battery-backed memory with flexible interface options and industrial-grade environmental resilience.

FAQ

What is the VBAT switchover threshold for the 23LCV04M-I/P?

The 23LCV04M-I/P switches from VCC to VBAT when the main supply drops below the VTRIP voltage, specified as 1.75 V (min), 1.85 V (typ), and 1.95 V (max). This hysteresis ensures clean transition without oscillation during brownout conditions, and the 23LCV04M-I/P retains full SRAM and STATUS register contents throughout the switchover.

Does the 23LCV04M-I/P support true quad-SPI (QSPI) protocol?

The 23LCV04M-I/P supports Serial Quad Interface (SQI), not industry-standard QSPI. SQI uses four multiplexed I/O lines (SIO0–SIO3) with command/address/data interleaving, enabling up to 4× throughput versus SPI at the same clock frequency. Unlike QSPI, SQI requires Microchip-specific command sets (e.g., EQIO, RSTIO) and does not implement standard QSPI instruction opcodes.

How does the ECC function in the 23LCV04M-I/P affect system-level error handling?

The 23LCV04M-I/P performs on-the-fly single-bit error correction during every read operation. When correction occurs, the ECS bit in the STATUS register is set to '1' and remains latched until the next read or power-on reset. System firmware can poll this bit to log potential memory stress events - the 23LCV04M-I/P itself requires no external intervention to maintain data integrity.

Can the 23LCV04M-I/P operate in SDI or SQI mode immediately after power-up?

No - the 23LCV04M-I/P defaults to SPI mode after power-on reset for backward compatibility. To enable SDI mode, the host must issue the EDIO command (0x3B); for SQI mode, the EQIO command (0x38) is required. Both commands are executed at 143 MHz maximum clock rate and persist until reset or explicit RSTIO (0xFF) command.

What is the significance of the NC pins (5–9) on the 23LCV04M-I/P 14-lead package?

Pins 5 through 9 on the 23LCV04M-I/P are designated No Connect (NC) and must remain unconnected in the PCB layout. These pins are electrically isolated from internal circuitry per Microchip's design; routing traces to or placing vias near them may introduce parasitic coupling or violate package thermal/mechanical specifications, potentially affecting 23LCV04M-I/P reliability under industrial temperature cycling.