Microchip Technology 23LC1024-E/P

Overview

23LC1024-E/P from Microchip Technology is a 1 Mbit (128K × 8) SPI Serial SRAM with SDI and SQI interface support, operating across 2.5–5.5 V and rated for automotive temperature range (−40°C to +125°C). It delivers 20 MHz clock rate in SPI/SDI modes (16 MHz in E-temp), 3 mA read current at 5.5 V/20 MHz, and 4 µA standby current at +85°C. It enables high-speed, low-power data buffering in microcontroller-based automotive control units.

For engineers reviewing the 23LC1024-E/P datasheet, 23LC1024-E/P pinout, 23LC1024-E/P application, or 23LC1024-E/P equivalent, key selection criteria include its E-temp qualification, quad/dual I/O capability, zero write time, unlimited endurance, and compatibility with PIC® and other SPI-capable MCUs in space-constrained automotive modules.

Technical Context

The 23LC1024-E/P implements a serial SRAM architecture with three configurable access modes-Byte, Page (32-byte), and Sequential-controlled via a writable MODE register. Its instruction set includes READ (0x03), WRITE (0x02), EDIO (0x3B), EQIO (0x38), and RSTIO (0xFF), enabling dynamic switching between SPI, SDI, and SQI protocols without reset.

It supports full-duplex SDI (2-bit/clock on SI/SO) and quad-duplex SQI (4-bit/clock on SIO0–SIO3), with HOLD functionality active only in SPI/SDI modes. The device powers up in Standby mode (CS = high) and requires CS low-to-high transition to initiate operation, ensuring deterministic initialization in noisy automotive environments.

Key Specifications

Pinout & Package

23LC1024-E/P is packaged in an 8-lead PDIP (Plastic Dual In-line Package) with 300 mil body width, RoHS-compliant matte tin finish, and industrial-grade thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14V101QS-SXI and FM25V01A-G, the 23LC1024-E/P offers broader voltage flexibility (2.5–5.5 V), native E-temp qualification, and SQI scalability-making it optimal for cost-sensitive, high-bandwidth automotive MCU peripherals where external backup isn't required.

Availability

23LC1024-E/P is available at Aetrix Electronics and suitable for automotive control units, ADAS pre-processing modules, and telematics gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 23LC1024-E/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 microcontrollers, analog, FPGA, and memory solutions, serving automotive, industrial, and consumer markets with vertically integrated silicon and tools.

The 23LC1024-E/P belongs to Microchip's serial SRAM product line, designed specifically for high-reliability, low-latency data buffering in resource-constrained embedded systems where SPI interface simplicity and automotive-grade robustness are essential.

FAQ

What is the maximum clock frequency supported by the 23LC1024-E/P in automotive temperature range?

The 23LC1024-E/P supports a maximum clock frequency of 16 MHz when operating across its full automotive temperature range (−40°C to +125°C), as specified in Table 1-2 AC CHARACTERISTICS. This derating ensures timing margin compliance under worst-case voltage and thermal stress, unlike the 20 MHz rating valid only for industrial temperature range.

Does the 23LC1024-E/P support Quad SPI (QSPI) mode, and how is it enabled?

Yes, the 23LC1024-E/P supports Serial Quad Interface (SQI) mode using pins SIO0–SIO3 for 4-bit-per-clock transfers. It is enabled by issuing the EQIO command (0x38) via SPI; the device then interprets subsequent operations in quad mode until RSTIO (0xFF) is sent to revert to SPI. HOLD functionality is disabled in SQI mode.

What package type does the 23LC1024-E/P use, and is it RoHS-compliant?

The 23LC1024-E/P uses an 8-lead Plastic Dual In-line Package (PDIP) with 300 mil body width. It is RoHS-compliant with matte tin (Sn) lead finish, meeting J-STD-609 Category 1 requirements and supporting lead-free reflow soldering per IPC/JEDEC J-STD-020.

How does the HOLD pin function on the 23LC1024-E/P, and when is it unavailable?

The HOLD pin (Pin 7) suspends ongoing SPI or SDI transactions without resetting the internal address counter-allowing paused communication to resume seamlessly. It is unavailable in SQI mode, where Pin 7 becomes SIO3 (bidirectional quad I/O). HOLD must be asserted while SCK is low to guarantee correct timing behavior.

What are the memory organization and page size of the 23LC1024-E/P?

The 23LC1024-E/P features a 128K × 8-bit organization (1 Mbit total), divided into 4096 pages of 32 bytes each. Page mode allows sequential access within a page boundary, automatically incrementing the internal address pointer-ideal for burst transfers aligned to 32-byte boundaries such as CAN FD payloads or audio sample blocks.