Overview
The PCA9548ABS,118 is an 8-channel I2C-bus switch with reset, manufactured by NXP USA Inc. This component is designed to facilitate the expansion of I2C-bus systems by allowing multiple downstream I2C-buses to be connected to a single upstream I2C-bus. It supports bidirectional voltage translation and is particularly useful in applications where multiple I2C devices need to be controlled from a single master device.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | HVQFN24 |
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Input Voltage Tolerance | 6 V tolerant inputs |
| Clock Frequency | 0 Hz to 400 kHz |
| ESD Protection | 2000 V HBM per JESD22-A114, 1000 V CDM per JESD22-C101 |
| Latch-up Testing | Exceeds 100 mA per JEDEC Standard JESD78 |
| Operating Temperature Range | -40°C to +85°C |
| Reset Input | Active LOW reset |
| Standby Current | Low standby current |
Key Features
- Bidirectional voltage translation between different I2C-bus voltages.
- Eight downstream I2C-bus channels that can be individually or collectively selected.
- Active LOW reset input to recover from stuck LOW states on the downstream I2C-buses.
- Internal Power-on reset function.
- Low standby current to conserve power.
- ESD protection and latch-up testing compliance with industry standards.
Applications
The PCA9548ABS,118 is suitable for various applications requiring the expansion and management of I2C-bus systems. These include:
- Embedded systems where multiple I2C devices need to be controlled.
- Industrial automation systems requiring multiple sensor and actuator interfaces.
- Consumer electronics such as smart home devices and IoT applications.
- Automotive systems where multiple I2C devices are integrated.
Q & A
- What is the primary function of the PCA9548ABS,118?
The primary function is to act as an 8-channel I2C-bus switch with reset, allowing multiple downstream I2C-buses to be connected to a single upstream I2C-bus. - What is the operating power supply voltage range of the PCA9548ABS,118?
The operating power supply voltage range is from 2.3 V to 5.5 V. - What is the clock frequency range supported by the PCA9548ABS,118?
The clock frequency range is from 0 Hz to 400 kHz. - Does the PCA9548ABS,118 have ESD protection?
Yes, it has ESD protection exceeding 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101. - What is the purpose of the active LOW reset input?
The active LOW reset input allows the device to recover from a situation where one of the downstream I2C-buses is stuck in a LOW state. - What are the package options available for the PCA9548A series?
The PCA9548A series is available in SO24, TSSOP24, and HVQFN24 packages. - What is the operating temperature range of the PCA9548ABS,118?
The operating temperature range is from -40°C to +85°C. - Does the PCA9548ABS,118 support bidirectional voltage translation?
Yes, it supports bidirectional voltage translation between different I2C-bus voltages. - How many downstream I2C-bus channels does the PCA9548ABS,118 support?
It supports eight downstream I2C-bus channels. - What is the significance of the internal Power-on reset function?
The internal Power-on reset function ensures that all channels are deselected upon power-up, similar to the effect of the active LOW reset input.
