Microchip Technology 23AA02M-I/P

Overview

23AA02M-I/P from Microchip Technology is a 2-Mbit serial SRAM with SPI/SDI/SQI interface, 1.7V–3.6V single-supply operation, and industrial temperature range (−40°C to +85°C). It delivers 143 MHz high-speed read capability in SQI mode, built-in ECC for data integrity, and supports byte/page/sequential access across 256 × 8-bit organization. Used in real-time data buffering for industrial controllers where low-voltage operation and error-resilient memory are critical.

For engineers reviewing the 23AA02M-I/P datasheet, 23AA02M-I/P pinout, 23AA02M-I/P application, or 23AA02M-I/P equivalent, key selection considerations include its 8-lead PDIP package, absence of VBAT backup support, SPI/SDI/SQI protocol flexibility, ECC-enabled reliability, and 143 MHz SQI read throughput - all validated for embedded systems requiring deterministic nonvolatile-critical RAM behavior.

Technical Context

The 23AA02M-I/P implements a tri-mode serial interface: default SPI (mode 0/3), configurable SDI (2-bit I/O), and SQI (4-bit I/O), enabling scalable bandwidth without pin count increase. Its internal STATUS register controls page size (32/256 bytes), output drive strength (8 levels), slew rate (4 settings), and latches ECC correction events per read cycle.

It features zero write time, unlimited read/write endurance, and automatic power-up initialization into SPI mode. The HOLD/SIO3 pin provides hardware pause capability in SPI/SDI modes, while SO/SIO1, SI/SIO0, SIO2, and SIO3 pins dynamically reconfigure based on active interface mode - all synchronized to SCK with strict timing margins (e.g., 2 ns min. data setup at 143 MHz).

Key Specifications

Pinout & Package

23AA02M-I/P uses an 8-lead PDIP package (0.300" width), pin-compatible with SOIC and TSSOP variants. All pins are electrically defined and validated per DS20006861A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 23LCV02M-I/P and AT25DF041A-SSH-T, the 23AA02M-I/P uniquely balances 143 MHz SQI throughput, ECC-protected SRAM behavior, and 8-lead PDIP compatibility - making it optimal for space-constrained, error-resilient, high-speed data buffering where battery backup is unnecessary.

Availability

23AA02M-I/P is available at Aetrix Electronics and suitable for industrial PLC data logging, medical sensor buffering, automotive body control modules, and smart meter firmware caching requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 23AA02M-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, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, consumer, and communications markets with vertically integrated silicon and software platforms.

The 23AA02M-I/P belongs to Microchip's 23XX02M serial SRAM product line, designed specifically for embedded systems needing high-speed, low-voltage, ECC-protected memory with flexible serial interfaces - targeting applications where reliability, pin efficiency, and deterministic timing outweigh density requirements.

FAQ

What is the maximum clock frequency supported by the 23AA02M-I/P in different interface modes?

The 23AA02M-I/P supports up to 40 MHz in standard SPI mode for READ (0x03) instructions, and up to 143 MHz in SQI mode for High-Speed Read (0x0B) and all configuration commands. SDI mode also operates at 143 MHz. These frequencies are validated across the full industrial temperature range and require adherence to AC timing parameters such as 2 ns minimum data setup time at 143 MHz. The 23AA02M-I/P does not support 143 MHz operation for standard SPI READ - that capability is exclusive to High-Speed Read in SQI/SDI modes.

Does the 23AA02M-I/P include battery backup support like the 23LCV02M?

No, the 23AA02M-I/P does not include VBAT functionality. Its pinout omits the VBAT terminal, and the device is specified only for 1.7V–3.6V VCC operation with data retention down to 1.0 V. In contrast, the 23LCV02M integrates a dedicated VBAT pin and automatic switchover circuitry for external battery backup. Therefore, 23AA02M-I/P is intended for applications where temporary VCC hold-up (e.g., via bulk capacitance) suffices, not full nonvolatile retention during extended power loss.

How does the built-in ECC logic function in the 23AA02M-I/P?

The 23AA02M-I/P implements on-chip Error Correction Code logic that automatically detects and corrects single-bit errors during every read operation. The ECC status is latched in the STATUS register's ECS bit (bit 13), which reads '1' only when correction was applied. This occurs transparently - no host software intervention is required. The 23AA02M-I/P does not support user-configurable ECC disable, nor does it report multi-bit errors; uncorrectable errors result in undefined data output. ECC applies exclusively to read operations, not writes.

Can the 23AA02M-I/P be used in both SPI mode 0 and mode 3?

Yes, the 23AA02M-I/P is fully compatible with both SPI mode 0 (CPOL = 0, CPHA = 0) and mode 3 (CPOL = 1, CPHA = 1). In both modes, data are sampled on the rising edge of SCK and driven on the falling edge. The distinction lies only in the idle state of SCK: low in mode 0, high in mode 3. The 23AA02M-I/P defaults to mode 0 after power-on reset but accepts either mode without reconfiguration - enabling interoperability with diverse host controllers including PIC, AVR, ARM, and FPGA-based SPI masters.

What package types are available for the 23AA02M-I/P, and is the -I/P suffix significant?

The 23AA02M-I/P is offered exclusively in 8-lead PDIP (Plastic Dual In-line Package) with 0.300" width, denoted by the '-I/P' suffix. 'I' indicates Industrial temperature grade (−40°C to +85°C), and 'P' specifies PDIP packaging. Unlike the 14-lead 23LCV02M, the 23AA02M is not available in SOIC or TSSOP variants under this part number. The 8-lead PDIP footprint simplifies prototyping and through-hole manufacturing while maintaining full electrical compatibility with Microchip's 23XX02M family timing and command set.