TI PCA9548ARGERG4

Mfr. Part

PCA9548ARGERG4

Manufacturer

Luminary Micro/Texas Instruments. Y-IC is a trusted quality distributor for Texas Instruments. We supply genuine parts, fast delivery, and expert support to ensure you get the best products and services.

Detailed Description

PCA9548ARGERG4 is an 8-channel I2C switch and multiplexer in the PCA9548A family. One upstream I2C bus (SDA/SCL) connects to eight downstream channels (SDA0–SDA7, SCL0–SCL7). Channels are enabled by a simple control register, letting you isolate devices per branch and resolve address conflicts. Supports Standard-mode 100 kHz and Fast-mode 400 kHz I2C. Operates from 2.3 V to 5.5 V. Includes a hardware RESET pin to recover stuck buses and restore default state. Address pins A0–A2 provide up to eight selectable device addresses on the same main bus. Category Integrated Circuits (ICs). Small classification Specialized ICs. Package VQFN-24 RGE with lead-free G4 finish.

Key Features

8 selectable downstream I2C channels controlled by one register

Upstream master channel with clean fan-out to each branch

2.3 V to 5.5 V supply range

I2C Standard-mode and Fast-mode up to 400 kHz

Hardware RESET to clear channel enables and recover bus

A0–A2 address pins for flexible device addressing on the main bus

Low power operation with low leakage paths

No level translation; each bus requires its own pull-up resistors

Robust ESD protection on I/O and supply pins

Industrial temperature range of -40°C to +85°C

Compact VQFN-24 with exposed thermal pad for improved heat relief

Key Advantages

Expands a single I2C bus into eight isolated branches

Eliminates same-address conflicts by placing devices on different channels

Reduces bus capacitance per branch for better signal integrity and reliability

Simplifies debugging and service with per-channel enable and reset control

Saves PCB area with a 4 mm x 4 mm QFN footprint

Scales easily by combining multiple devices using address pins

Packaging

Type VQFN-24 RGE with exposed thermal pad

Body size about 4.0 mm x 4.0 mm, thin profile for dense layouts

24 perimeter leads plus center thermal pad; 0.5 mm lead pitch

Materials copper leadframe, high-reliability mold compound, matte tin plating; lead-free G4

Pin configuration includes upstream SDA/SCL, eight downstream SDAx/SCLx pairs, A0–A2 address pins, RESET, VCC, GND, and exposed pad EP

Thermal behavior improved by EP; solder EP to a grounded copper area for lower thermal resistance and stable operation

Electrical properties include 2.3–5.5 V supply, 100 kHz and 400 kHz I2C support, open-drain compatible I/O, pull-up resistors required per bus, low standby power consumption, and strong ESD protection

For exact mechanical dimensions, land patterns, and thermal metrics, refer to the datasheet

Lifecycle

Status Active and widely used; not nearing discontinuation based on current TI portfolio

Direct equivalents and alternatives

- Texas Instruments TCA9548A 8-channel I2C switch with broader supply range, available in similar packages

- NXP PCA9548A functionally equivalent 8-channel I2C switch used across many designs

- If you need fewer channels, consider TI TCA9546A or NXP PCA9546A 4-channel versions

Check datasheets for pin compatibility and electrical limits before substitution

If you need more options or long-term supply planning, contact Y-IC sales via our website for tailored guidance

Key Application Areas

Multi-sensor hubs and platforms with duplicate I2C addresses

Embedded systems and industrial controllers needing many peripherals

Long-trace or high-capacitance I2C layouts requiring branch isolation

Telecom, networking, and server boards with dense I2C management

Robotics, drones, and wearables with modular sensor arrays

Lab and production test setups needing selective device access

Datasheet

Y-IC hosts the most authoritative and up-to-date datasheet for PCA9548ARGERG4. Download it on this page to get full specs, timing, register map, pinout, layout and thermal guidelines, and application notes.

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