Overview
The PCA9543AD,112 is a 2-channel I²C-bus switch with interrupt logic and reset, manufactured by NXP USA Inc. This component is designed to control and manage multiple I²C-bus channels, making it an essential part of complex electronic systems that require robust and flexible communication between different devices.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 2 |
| Bus Interface | I²C-bus, compatible with SMBus standards |
| Interrupt Inputs | 2 active LOW interrupt inputs (INT0 and INT1) |
| Interrupt Output | 1 active LOW interrupt output (INT) |
| Reset Input | Active LOW reset input |
| Address Pins | 2 address pins allowing up to 4 devices on the I²C-bus |
| Voltage Range | 2.3 V to 5.5 V |
| Clock Frequency | 0 Hz to 400 kHz |
| Package Type | SO14, TSSOP14 |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 |
Key Features
- 1-of-2 bidirectional translating switches
- Channel selection via I²C-bus, in any combination
- Power-up with all switch channels deselected
- Low Ron switches
- Voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses
- No glitch on power-up
- Supports hot insertion
- Low standby current
- 5 V tolerant inputs
Applications
The PCA9543AD,112 is suitable for a variety of applications, including:
- Complex I²C-bus systems requiring multiple channel management
- Systems needing voltage level translation between different bus voltages
- Automotive and industrial control systems where robust communication is critical
- Embedded systems requiring interrupt handling and reset capabilities
Q & A
- What is the primary function of the PCA9543AD,112?
The PCA9543AD,112 is a 2-channel I²C-bus switch that allows for the control and management of multiple I²C-bus channels. - How many interrupt inputs does the PCA9543AD,112 have?
The PCA9543AD,112 has 2 active LOW interrupt inputs (INT0 and INT1). - What is the purpose of the reset input on the PCA9543AD,112?
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 is the operating voltage range of the PCA9543AD,112?
The operating voltage range is from 2.3 V to 5.5 V. - Does the PCA9543AD,112 support hot insertion?
Yes, the PCA9543AD,112 supports hot insertion. - What are the package types available for the PCA9543AD,112?
The PCA9543AD,112 is available in SO14 and TSSOP14 packages. - How many devices can be connected on the I²C-bus using the PCA9543AD,112?
Up to 4 devices can be connected on the I²C-bus using the PCA9543AD,112, with alternate address versions allowing up to 12 devices in total. - What is the clock frequency range of the PCA9543AD,112?
The clock frequency range is from 0 Hz to 400 kHz. - Does the PCA9543AD,112 provide ESD protection?
Yes, the PCA9543AD,112 provides ESD protection exceeding 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101. - What is the standby current of the PCA9543AD,112?
The PCA9543AD,112 has a low standby current.
