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23A1024-I/SN

MCHP23A1024-I/SN

Microchip Technology
SRAM Memory IC 1Mbit SPI - Quad I/O 20 MHz 8-SOIC
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Overview

The 23A1024-I/SN is a 1 Mbit Serial SRAM organized as 128K x 8 bits, designed for applications requiring high-speed external RAM with a low pin count. It operates over a 1.7V to 2.2V supply range and supports standard SPI as well as high-bandwidth SDI (Serial Dual Interface) and SQI (Serial Quad Interface) modes. With a 20 MHz maximum clock frequency and zero write cycle times, it provides a simple way to expand volatile memory in low-voltage systems.

Why Choose This Part

The device features extremely low standby current of 4 uA and an active run current of 10 mA at 20 MHz, making it suitable for battery-powered designs. Its Quad I/O (SQI) interface significantly increases throughput compared to standard SPI while using only an 8-SOIC footprint. Unlike Flash or EEPROM, it offers unlimited endurance and no write-delay requirements.

Applications

Audio Buffering
Used as a scratchpad for digital audio processing and delay buffering where low latency is critical.
Data Logging
Serves as a high-speed intermediate buffer for sensor data before it is committed to non-volatile flash memory.
Display Scans
Functions as a frame buffer for small, low-power displays requiring fast pixel data updates without the overhead of DRAM.
Communication Offloading
Buffers incoming network packets or serial data streams to prevent data loss during heavy MCU processing loads.

Key Specifications

Technology SRAM
Memory Size 1Mbit
Memory Type Volatile
Memory Format SRAM
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Clock Frequency 20 MHz
Memory Interface SPI - Quad I/O
Voltage - Supply 1.7V ~ 2.2V
Memory Organization 128K x 8
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 8-SOIC

Getting Started

To interface with the 23A1024, configure your microcontroller SPI peripheral for Mode 0,0 or 1,1 and ensure the VDD is within the 1.7V to 2.2V range. Use the SQI mode (command 0x38) to enable four-bit data transfers for maximum performance. Microchip provides the MPLAB XC8/XC16 compilers and specialized libraries to simplify the implementation of Serial SRAM drivers.

Also Consider

APS6404L AP Memory - Offers much higher 64 Mbit density using a similar SPI/QPI interface for memory-intensive applications.

Categories

Memory & Storage > SRAM
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