Adafruit 24LC32 I2C EEPROM Breakout - 32Kbit / 4 KB - STEMMA QT

Breakout for the 24LC32 I2C EEPROM providing 32 Kbit (4 KB) of byte-addressable non-volatile storage via STEMMA QT/Qwiic connectors. Suitable for calibration data, tokens, and unique identifiers; rated for over one million write cycles.

Logical pinout · physical placement not verified

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 · UnknownVoltage · 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 · GPIOVoltage · 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 · Analog
A1back-jumper
Address jumper. Adafruit Learn says closing A1 helps select one of up to 8 I2C addresses.
Type · Analog
A2back-jumper
Address jumper. Adafruit Learn says closing A2 helps select one of up to 8 I2C addresses.
Type · Analog

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		Unknown	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		GPIO	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	Analog	Address jumper. Adafruit Learn says closing A0 helps select one of up to 8 I2C addresses.
A1	back-jumper	Analog	Address jumper. Adafruit Learn says closing A1 helps select one of up to 8 I2C addresses.
A2	back-jumper	Analog	Address jumper. Adafruit Learn says closing A2 helps select one of up to 8 I2C addresses.

Logical pinout · physical placement not verified

Pin details

10 connections

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.
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.
PowerVoltage · 3.3V output, up to 100mA per Adafruit Learn pinouts
GND
Common ground for power and logic.
GroundVoltage · 0V
SCL
I2C clock line. Adafruit Learn says this pin is level shifted for 3-5V logic and has a 10K pull-up.
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.
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.
UnknownVoltage · 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.
GPIOVoltage · Connect to VCC for write protect per Adafruit Learn pinouts
A0
Address jumper. Adafruit Learn says closing A0 helps select one of up to 8 I2C addresses.
Analog
back-jumper
A1
Address jumper. Adafruit Learn says closing A1 helps select one of up to 8 I2C addresses.
Analog
back-jumper
A2
Address jumper. Adafruit Learn says closing A2 helps select one of up to 8 I2C addresses.
Analog
back-jumper

Memory

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