Overview
The PCA9546AD,112 is a 4-channel I2C-bus switch with reset, manufactured by NXP USA Inc. This device is designed to control and switch between multiple I2C-bus channels, making it an essential component in systems that require multiple I2C devices to be connected to a single I2C-bus master. The PCA9546A series, including the PCA9546AD,112, allows for the selection of individual or multiple downstream channels through a programmable control register, enhancing the flexibility and scalability of I2C-bus systems.
Key Specifications
| Parameter | Value |
|---|---|
| Operating 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 |
| Package Type | 16-SOIC (0.154", 3.90mm Width) |
| Power Dissipation | 400 mW |
| Reset Input | Active LOW |
| Standby Current | Low standby current |
Key Features
- Quad bidirectional translating switch controlled via the I2C-bus.
- Ability to select individual or multiple downstream channels through a programmable control register.
- Active LOW reset input to recover from bus fault conditions.
- Internal Power-On Reset (POR) function to initialize the device upon power-up.
- Voltage translation capability to limit the maximum voltage passed between I2C-buses.
- Low standby current and low power dissipation.
- ESD protection and latch-up testing compliance with industry standards.
Applications
- Multi-master I2C-bus systems where multiple devices need to be connected to a single master.
- Systems requiring voltage translation between different I2C-bus segments.
- Embedded systems, such as industrial control, medical devices, and consumer electronics, where multiple I2C devices are used.
- Automotive systems that require robust and reliable I2C communication.
Q & A
- What is the PCA9546AD,112 used for?
The PCA9546AD,112 is used as a 4-channel I2C-bus switch with reset, allowing multiple I2C devices to be connected to a single I2C-bus master.
- What is the operating supply voltage range of the PCA9546AD,112?
The operating supply voltage range is from 2.3 V to 5.5 V.
- What is the maximum clock frequency supported by the PCA9546AD,112?
The maximum clock frequency supported is 400 kHz.
- Does the PCA9546AD,112 have ESD protection?
Yes, it exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
- How does the reset function work on the PCA9546AD,112?
The reset function is activated by an active LOW signal on the RESET pin, which resets the device and deselects all channels.
- What types of packages are available for the PCA9546AD,112?
The device is available in SO16, TSSOP16, and HVQFN16 packages.
- Is the PCA9546AD,112 still in production?
No, the PCA9546AD,112 is listed as obsolete and is no longer manufactured.
- What are some common applications of the PCA9546AD,112?
Common applications include multi-master I2C-bus systems, systems requiring voltage translation, and various embedded systems.
- How does the voltage translation work on the PCA9546AD,112?
The device can act as a voltage translator by limiting the maximum voltage passed between I2C-buses based on the supply voltage.
- What is the power dissipation of the PCA9546AD,112?
The power dissipation is 400 mW.
