EEPROM IC Set — 24C01–24C512 (I²C) & 93C46–93C86 (SPI/Microwire), SOP-8 (10-Pack)

This EEPROM IC set covers the two most widely used serial EEPROM families: the 24Cxxx series (I²C interface, 1Kbit–512Kbit) and the 93Cxxx series (SPI/Microwire interface, 64bit–2Kbit). Both families are available in SOP-8 SMD packages and are used extensively in automotive ECU programming, BIOS chip replacement, key programmer tools, and embedded system configuration storage. Select your required IC from the dropdown.

24Cxxx Series (I²C) Specifications

Part Number	Capacity	Interface	Common Application
24C01	1Kbit (128 bytes)	I²C	Small config storage, EEPROM emulation
24C02	2Kbit (256 bytes)	I²C	Most common: TV, monitor, appliance EEPROM
24C04	4Kbit (512 bytes)	I²C	Set-top box, remote control config
24C08	8Kbit (1KB)	I²C	Automotive BCM, instrument cluster
24C16	16Kbit (2KB)	I²C	Automotive ECU, LCD monitor EDID
24C32	32Kbit (4KB)	I²C	DS3231 RTC module EEPROM
24C64	64Kbit (8KB)	I²C	Automotive key data, ECU calibration
24C128	128Kbit (16KB)	I²C	Larger config storage, data logging
24C256	256Kbit (32KB)	I²C	Arduino EEPROM expansion module
24C512	512Kbit (64KB)	I²C	Large data storage, industrial config

93Cxxx Series (SPI/Microwire) Specifications

Part Number	Capacity	Interface	Common Application
93C46	1Kbit (64×16 or 128×8)	SPI/Microwire	Automotive ECU, immobilizer, key programmer
93C56	2Kbit	SPI/Microwire	Automotive BCM, dashboard EEPROM
93C66	4Kbit	SPI/Microwire	Automotive airbag ECU, ABS module
93C76	8Kbit	SPI/Microwire	Automotive instrument cluster
93C86	16Kbit	SPI/Microwire	Automotive ECU, larger config storage

Why Choose This EEPROM Set?

Both I²C and SPI families — covers 24Cxxx (most consumer electronics) and 93Cxxx (most automotive ECU)
SOP-8 SMD package — direct replacement on existing PCB footprints
Wide capacity range — from 1Kbit (24C01) to 512Kbit (24C512) in one listing
Automotive grade compatible — 93Cxxx series used in ECU, BCM, airbag, and immobilizer modules
10-pack value — sufficient for multiple repair jobs and programming sessions

Compatible With / Common Use Cases

Automotive ECU repair: 93C46/93C66 replacement in engine ECU, airbag module, and ABS controller
Key programmer tools: 93C46/93C56 for car key immobilizer EEPROM reading and writing (VVDI, Orange5, TL866)
LCD monitor EDID: 24C02 stores EDID data in LCD monitors — replace to fix “no signal” or resolution issues
Arduino EEPROM expansion: 24C256/24C512 module for non-volatile data storage in Arduino projects
BIOS chip replacement: 24Cxxx for BIOS/UEFI configuration storage on older motherboards

Frequently Asked Questions

Q: What is the difference between 24C02 and 93C46?
A: 24C02 uses I²C interface (2-wire: SDA + SCL) and stores 256 bytes. 93C46 uses SPI/Microwire interface (3–4 wire: CS, SK, DI, DO) and stores 64×16-bit or 128×8-bit words. 24C02 is common in consumer electronics (TVs, monitors, appliances). 93C46 is the standard automotive EEPROM used in ECU, BCM, and immobilizer modules.

Q: How do I read/write 24C02 with Arduino?
A: Connect SDA to A4, SCL to A5, VCC to 5V, GND to GND, A0–A2 to GND (address 0x50). Use Wire library: Wire.beginTransmission(0x50); Wire.write(address); Wire.endTransmission(); Wire.requestFrom(0x50, 1); byte data = Wire.read(); Or use the extEEPROM library for easier page-write handling.

Q: Can I use a TL866 programmer to read/write 93C46?
A: Yes — TL866II Plus and TL866A support 93C46, 93C56, 93C66, 93C76, and 93C86 in SOP-8 package (with SOP-8 adapter). Select the correct part number and organization (x8 or x16) in the programmer software. For automotive ECU EEPROM, use dedicated automotive programmers (Orange5, VVDI Prog) for better protocol support.