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The PCA9548ABS is an 8-channel I²C bus switch launched by NXP (NXP Semiconductors), supporting bidirectional signal transmission and integrating a low-level active reset function. The chip is packaged in an HVQFN-24 (4×4mm) package and is suitable for applications such as multi-master I²C bus expansion and voltage level conversion, widely used in industrial control, consumer electronics, communication equipment, and other fields.

PCA9548ABS Core Features

8-channel I²C bus switch: Supports expansion from 1 upstream port (SCL/SDA) to 8 downstream ports, with channels selectable individually or in combination.

Low-level reset (RESET): Allows recovery from an I²C bus deadlock state, enhancing system reliability.

Voltage level conversion: Supports mixed use of 1.8V, 2.5V, 3.3V, and 5V buses without requiring additional level conversion circuits.

Low On-Resistance (Ron ≤55Ω): Reduces signal attenuation and improves transmission quality.  

Wide Voltage Operating Range (2.3V~5.5V): Compatible with various power supply systems.  

High ESD Protection (2000V HBM): Enhances anti-static capability, suitable for industrial environments.  

Supports Hot-Swap: Avoids power-on pulse interference, suitable for removable device designs.

PCA9548ABS Key Parameters

Package    HVQFN-24 (4×4mm)

Operating voltage    2.3V to 5.5V

On-resistance    ≤55Ω

Maximum frequency    400kHz (I²C standard mode)

Reset Level: Low-level active (RESET)  

I/O Voltage Rating: 6V tolerance  

ESD Protection: 2000V HBM / 1000V CDM  

Operating Temperature: -40°C to +85°C  

Standby Current: 65μA (typical)

PCA9548ABS Typical Applications

Industrial Automation: PLC, HMI multi-device I²C bus expansion.

Consumer Electronics: Signal switching between smart home controllers and sensors.

Communication Equipment: Multi-module I²C communication management (e.g., switches, routers).

Automotive Electronics: In-vehicle infotainment systems (must comply with AEC-Q100 standards).

Test Instruments: Multi-channel signal acquisition and switching.

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  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

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• 6.Can the company issue an invoice?

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