Overview
The PCA9546AD,118 is a 4-channel I2C-bus switch with reset, manufactured by NXP USA Inc. This device is designed to manage multiple I2C-bus channels, allowing for the selection of individual or combined channels through an I2C-bus interface. It features an active LOW reset input, which helps recover from situations where a downstream I2C-bus is stuck in a LOW state. The PCA9546AD is part of the PCA9546A series, known for its versatility in I2C-bus management and voltage translation capabilities.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | SO16 (Small Outline Package, 16 leads) |
| Package Dimensions | 9.9 mm x 3.9 mm x 1.35 mm body |
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Input Voltage Tolerance | 5 V tolerant Inputs |
| Clock Frequency | 0 Hz to 400 kHz |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 |
| Latch-up Testing | Exceeds 100 mA per JEDEC Standard JESD78 |
| Reset Input | Active LOW reset input |
| Address Pins | 3 address pins allowing up to 8 devices on the I2C-bus |
| Standby Current | Low standby current |
Key Features
- Quad bidirectional translating switch controlled via the I2C-bus
- SCL/SDA upstream pair fans out to four downstream pairs or channels
- Channel selection via I2C-bus, in any combination
- Active LOW reset input to recover from stuck LOW state on downstream I2C-buses
- Power-up with all switch channels deselected
- No glitch on power-up
- Supports hot insertion
- Voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses
- Low RON switches
Applications
- I2C-bus multiplexing in embedded systems
- Voltage translation between different I2C-bus segments
- Hot-swappable I2C devices
- Automotive and industrial control systems requiring multiple I2C channels
- Consumer electronics with multiple I2C peripherals
Q & A
- What is the PCA9546AD,118 used for?
The PCA9546AD,118 is used as a 4-channel I2C-bus switch with reset, allowing the management of multiple I2C-bus channels.
- What are the package options for the PCA9546A series?
The PCA9546A series is available in SO16, TSSOP16, and HVQFN16 packages.
- What is the operating power supply voltage range for the PCA9546AD?
The operating power supply voltage range is from 2.3 V to 5.5 V.
- Does the PCA9546AD support voltage translation?
- 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).
- How many devices can be addressed on the I2C-bus using the PCA9546AD?
- What is the clock frequency range for the PCA9546AD?
- Does the PCA9546AD have ESD protection?
- What is the standby current of the PCA9546AD?
- Can the PCA9546AD support hot insertion?
