Adafruit 24LC32 I2C EEPROM Breakout - 32Kbit / 4 KB - STEMMA QT
Pinout
- VIN
Power input. Adafruit Learn says the onboard regulator accepts 3-5VDC and safely converts it down; power it at the same logic level as the microcontroller.
Type · powerVoltage · 3-5VDC input per Adafruit Learn pinouts - 3Vo
3.3V output from the onboard regulator. Adafruit Learn says up to 100mA can be taken from this pin.
Type · powerVoltage · 3.3V output, up to 100mA per Adafruit Learn pinouts - GND
Common ground for power and logic.
Type · groundVoltage · 0V - SCL
I2C clock line. Adafruit Learn says this pin is level shifted for 3-5V logic and has a 10K pull-up.
Type · i2cVoltage · 3-5V logic per Adafruit Learn pinouts - SDA
I2C data line. Adafruit Learn says this pin is level shifted for 3-5V logic and has a 10K pull-up.
Type · i2cVoltage · 3-5V logic per Adafruit Learn pinouts - STEMMA QT
STEMMA QT / Qwiic I2C connector carrying the same I2C bus and power connections for solderless chaining.
Type · connectorVoltage · 3-5V logic/power context per Adafruit Learn and product page - WP
Write-protect input. Adafruit Learn says connecting WP to VCC makes the EEPROM read-only.
Type · digital inputVoltage · Connect to VCC for write protect per Adafruit Learn pinouts - A0back-jumper
Address jumper. Adafruit Learn says closing A0 helps select one of up to 8 I2C addresses.
Type · configuration - A1back-jumper
Address jumper. Adafruit Learn says closing A1 helps select one of up to 8 I2C addresses.
Type · configuration - A2back-jumper
Address jumper. Adafruit Learn says closing A2 helps select one of up to 8 I2C addresses.
Type · configuration
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VIN | power | Power input. Adafruit Learn says the onboard regulator accepts 3-5VDC and safely converts it down; power it at the same logic level as the microcontroller. | 3-5VDC input per Adafruit Learn pinouts | |
| 3Vo | power | 3.3V output from the onboard regulator. Adafruit Learn says up to 100mA can be taken from this pin. | 3.3V output, up to 100mA per Adafruit Learn pinouts | |
| GND | ground | Common ground for power and logic. | 0V | |
| SCL | i2c | I2C clock line. Adafruit Learn says this pin is level shifted for 3-5V logic and has a 10K pull-up. | 3-5V logic per Adafruit Learn pinouts | |
| SDA | i2c | I2C data line. Adafruit Learn says this pin is level shifted for 3-5V logic and has a 10K pull-up. | 3-5V logic per Adafruit Learn pinouts | |
| STEMMA QT | connector | STEMMA QT / Qwiic I2C connector carrying the same I2C bus and power connections for solderless chaining. | 3-5V logic/power context per Adafruit Learn and product page | |
| WP | digital input | Write-protect input. Adafruit Learn says connecting WP to VCC makes the EEPROM read-only. | Connect to VCC for write protect per Adafruit Learn pinouts | |
| A0 | back-jumper | configuration | Address jumper. Adafruit Learn says closing A0 helps select one of up to 8 I2C addresses. | |
| A1 | back-jumper | configuration | Address jumper. Adafruit Learn says closing A1 helps select one of up to 8 I2C addresses. | |
| A2 | back-jumper | configuration | Address jumper. Adafruit Learn says closing A2 helps select one of up to 8 I2C addresses. |
Memory
38 other options24LC32/25LC256 EEPROM, I2C FRAM, 64Mbit PSRAM, and microSD breakouts up to 64GB — matched to write frequency and data volume, not just interface.
256MB Micro SD Memory Card visual preview256MB Micro SD Memory Card
25LC256 256 Kbit SPI EEPROM visual preview25LC256 256 Kbit SPI EEPROM
64 Mbit Serial Pseudo SRAM - PSRAM - 3.3V 133 MHz visual preview64 Mbit Serial Pseudo SRAM - PSRAM - 3.3V 133 MHz
8GB Class 10 SD/MicroSD Memory Card - SD Adapter Included visual preview8GB Class 10 SD/MicroSD Memory Card - SD Adapter Included
Adafruit I2C Non-Volatile FRAM Breakout - 256Kbit / 32KByte visual previewAdafruit I2C Non-Volatile FRAM Breakout - 256Kbit / 32KByte
Adafruit microSD card breakout board visual previewAdafruit microSD card breakout board
Arduino Wireless SD Shield visual previewArduino Wireless SD Shield
AT24CXX EEPROM Board visual previewAT24CXX EEPROM Board
DiMeCard 8 microSD Card Holder visual previewDiMeCard 8 microSD Card Holder
Fermion: MicroSD Card Module for Arduino (Breakout) visual previewFermion: MicroSD Card Module for Arduino (Breakout)
Fermion: Serial Data Logger V2.0 for Arduino visual previewFermion: Serial Data Logger V2.0 for Arduino
FM24CXX FRAM Board visual previewFM24CXX FRAM Board
Related groups
4 groups
10W Super Bright LED - Violet visual preview
10W Super Bright LED - Warm White visual preview
3-Pin LED Strip Connector Cable - Single Head (5PCS) visual preview
3-Pin LED Strip Connector Cable (5PCS) visual previewLED pixels
WS2812/SK6812 NeoPixel strips, rings and Jewels, APA102 DotStar pixels, and plain analog RGB strips — each matched to its protocol and host, not just its connector.
Components · Addressable LEDs · 176 parts
18-Channel 8-bit PWM LED Driver w/ I2C Interface visual preview
24LC256 I/P I2C EEPROM PDIP-8 visual preview24LC256 P DIP-8 visual preview
4N25 DIP-6 visual previewBare ICs
74HC logic gates, MCP3008/MCP23017 ADCs and expanders, 24LC256 EEPROM, 4N25-series optocouplers and ULN2803A drivers — bare DIP chips with no breakout-board conveniences like pull-ups or level shifting.
Components · Integrated circuits · 68 parts
10-bit ADC (SPI) visual preview
2-Channel RS232 Module for Raspberry Pi Pico visual preview
4-Ch USB 3.2 Gen1 Hub (USB3.2-Gen1-HUB-4U) visual preview
6-in-1 USB to Serial Converter visual previewConverters
ADS1115/MCP3421 ADCs, MCP4725 and GP8413 DACs, CP2102 USB-UART boards, and I2C plumbing like the LTC4316 address shifter — matched to bus, resolution and signal range.
Components · Interface converters · 115 parts
1/4W Resistor Pack - 400 PCS visual preview
1N4001 Diode - 10 pack visual preview
1N4007 Diode visual preview
1N4148 General Purpose Fast Switching Diode visual previewPassives
E12 resistor kits, ceramic and electrolytic capacitor sets, 1N4148/1N4007 diodes, TIP120 Darlingtons, IRLZ44N MOSFETs and 100F supercapacitors — bench stock in kit quantities.
Components · Passives · 56 parts