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23LC1024-I/SN

1Mbit Serial SRAM, SPI/SDI/SQI, 20MHz, unlimited endurance, 8-SOIC

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Manufacturer Part：

23LC1024-I/SN

Package：

8-SOIC (5.0 x 4.0 x 1.5mm)

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Description

Product Overview

The 23LC1024-I/SN from Microchip Technology is a 1Mbit (128KB) Serial SRAM with SDI, SPI, and SQI interface options. It features 20MHz clock speed, unlimited read/write endurance, 8-byte page mode, and byte-level random access in an 8-pin SOIC package.

Key Specifications

Manufacturer Microchip Technology
Memory Type Serial SRAM
Density 1Mbit (128K x 8)
Interface SDI / SPI / SQI
Max Clock Frequency 20MHz (SPI), 20MHz (SQI)
Supply Voltage 2.5V to 5.5V
Standby Current 5uA typical
Active Current 3mA typical @ 20MHz
Write Endurance Unlimited
Package 8-SOIC (5.0 x 4.0mm)
Operating Temperature -40C to +85C

Features

  • 1Mbit serial SRAM with three interface modes
  • SDI (Serial Dual Interface), SPI, and SQI modes
  • Unlimited read/write endurance
  • Byte-level random access
  • 8-byte page mode for faster access
  • Low standby current: 5uA typical
  • Single-cycle read/write in SQI mode
  • Hold pin for pausing serial communication

Applications

  • External RAM expansion for microcontrollers
  • Graphics and display buffers
  • Data logging and audio buffers
  • Embedded systems requiring additional SRAM

The Microchip 23LC1024-I/SN is a 1Mbit serial SRAM device designed to provide additional RAM to microcontroller-based systems using a simple serial interface. The device supports three interface modes: standard SPI (single data line), SDI (dual data lines for 2x throughput), and SQI (quad data lines for 4x throughput). Unlike EEPROM or Flash, SRAM provides unlimited read/write endurance with no page-erase requirements. The device operates from 2.5V to 5.5V and features byte-level random access, making it ideal for applications requiring frequent data updates. The 8-byte page mode allows faster sequential access for data streaming applications.

The 23LC1024-I/SN operates as a serially-accessed SRAM with three interface modes: 1) SPI Mode: Standard 4-wire SPI interface with MOSI, MISO, SCK, and CS pins. Each read or write operation requires a command byte followed by 24-bit address, transferring one byte per clock cycle. 2) SDI Mode: Uses two data lines (SIO0 and SIO1) for input and output simultaneously, doubling throughput compared to SPI. 3) SQI Mode: Uses all four data lines (SIO0-SIO3) for both input and output, quadrupling throughput. Single-cycle read/write is supported in SQI mode. The internal SRAM array provides direct byte-level access without erase requirements, enabling true random access with unlimited endurance.

Pin Name Type Function
1 CS Input Chip select (active low)
2 SIO1/SO I/O Serial data out / SIO1 in SDI/SQI
3 SIO2 I/O Serial data 2 (SQI mode)
4 VSS Power Ground
5 SIO0/SI I/O Serial data in / SIO0 in SDI/SQI
6 SCK Input Serial clock
7 HOLD Input Hold (pauses serial communication)
8 VDD Power Supply voltage (2.5V to 5.5V)
  • External SRAM expansion for MCU with limited on-chip RAM
  • Graphics display frame buffer in embedded systems
  • Audio streaming buffer in IoT devices
Manufacturer Part Number Package Notes
Microchip 23LC512-I/SN 8-SOIC 512Kbit, same series
Microchip 23LCV1024-I/ST TSSOP-8 1Mbit with battery backup
ISSI IS62WVS1024BLL 8-SOIC 1Mbit serial SRAM
AP Memory APS6404L-3SQN 8-SOIC 4Mbit, SPI/QPI SRAM
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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