TCA6424RGJR

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TCA6424RGJR

IC I/O EXPANDER I2C 24B 32QFN

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Specifications

Supplier Texas Instruments,Rochester Electronics, LLC
Package Tape & Reel (TR),Cut Tape (CT),Bulk
ProductStatus Not For New Designs
NumberofI/O 24
Interface I²C, SMBus
InterruptOutput Yes
Features POR
OutputType Push-Pull
Current-OutputSource/Sink 10mA, 25mA
ClockFrequency 400 kHz
Voltage-Supply 1.65V ~ 5.5V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 32-UFQFN Exposed Pad

Overview

Description

The TCA6424RGJR is a Texas Instruments 24‑bit I2C I/O expander. It provides 24 GPIOs organized as three 8‑bit ports, enabling a microcontroller to expand I/O without extra pins.
Key features
- 24 programmable I/O lines (8 bits per port, P0–P23)
- I2C interface with 3 hardware address pins (A0–A2) for multiple devices on the bus
- Configurable direction per pin (input or output)
- Output data and input data registers; polarity inversion and interrupt output (INT)
- RoHS-compliant packaging (RGJR suffix indicates lead-free packaging)
How it’s used (overview)
- Configure pin directions via IODIR registers
- Write outputs via the OLAT/GPIO registers
- Read inputs from the GPIO registers
- Optional interrupt can alert the host on input changes
- Addressing allows several devices on the same I2C bus
Typical applications
- Expanding MCU I/O for LEDs, switches, sensors, keypad matrices, and other peripherals
For exact electrical specs, register map, timing, and package details, see the TI TCA6424RGJR datasheet.

Features

TCA6424RGJR Features:
- 24-bit I/O expander with I2C-bus interface (two-wire)
- Three 8-bit ports (24 GPIOs total)
- Per-pin direction control (input/output) via IODIR
- Per-pin data latch and readback
- Per-pin input polarity inversion (IPOL)
- I2C fast-mode up to 400 kHz
- Hardware address selectable via A0–A2 pins (base address adjustable)
- Interrupt output (INT) for GPIO-change signaling
- Wide supply range: Vcc 1.65 V to 5.5 V
- Low power consumption
- Available in RGJR package (Tape & Reel)

Package

28-pin VSSOP (TSSOP) package.

Pinout

- Pin count: 28-pin package (e.g., TSSOP/SSOP).
- Function: 24-bit I2C GPIO expander (three 8-bit ports), allows extending MCU I/O over I2C with address pins (A0–A2) and an interrupt output.

Manufacturer

- Manufacturer: Texas Instruments (TI)
- Company type: American multinational semiconductor company that designs and manufactures analog and digital integrated circuits and embedded processing products.

Application

Applications: I2C-bus 24-bit I/O expander for microcontrollers with limited GPIO. Use cases include driving LEDs, LCD backlights, relays, and keypad matrices; reading switches and sensors; expanding I/O in home automation, consumer electronics, automotive, and industrial automation; prototyping and development boards; robotics and HMI interfaces; any system needing extra programmable digital I/O without extra MCU pins.

Equivalent

Closest equivalents to the TCA6424RGJR (24‑bit I2C GPIO expander) are:
- NXP PCA6424 (24‑bit I2C GPIO expander)
- TI TCA6424 (24‑bit I2C GPIO expander)
Note: check exact package, voltage, I2C address options and datasheets for true pin‑for‑pin compatibility.

Shipping

Shipping MethodsWe

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

Payment Methods

The Payment term is 100% Prepaid.

Currently, we only accept the below payment methods:

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2. Credit/ Debit Card

3. Wire Transfer

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