Overview
The PCA9546ABS,118 is a 4-channel I2C-bus switch with reset, manufactured by NXP USA Inc. This device is a quad bidirectional translating switch controlled via the I2C-bus, allowing the SCL/SDA upstream pair to fan out to four downstream pairs or channels. The PCA9546A can select any individual SCx/SDx channel or combination of channels based on the contents of the programmable control register. It features an active LOW reset input to recover from bus fault conditions and an internal Power-On Reset (POR) function to ensure all channels are deselected at power-up.
Key Specifications
| Specification | Value |
|---|---|
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Input Voltage Tolerance | 5 V tolerant |
| 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 Types | SO16, TSSOP16, and HVQFN16 |
| Temperature Range | -40°C to +85°C |
| Standby Current | Low standby current |
Key Features
- 1-of-4 bidirectional translating switches
- I2C-bus interface logic compatible with SMBus standards
- Active LOW reset input
- Three address pins allowing up to 8 devices on the I2C-bus
- Channel selection via I2C-bus, in any combination
- 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
Applications
The PCA9546ABS,118 is suitable for various applications requiring I2C-bus switching and voltage level translation. These include but are not limited to:
- Embedded systems requiring multiple I2C-bus devices
- Industrial automation and control systems
- Consumer electronics with multiple I2C-bus peripherals
- Automotive systems needing robust I2C-bus switching
- Medical devices requiring reliable I2C communication
Q & A
- What is the PCA9546ABS,118? The PCA9546ABS,118 is a 4-channel I2C-bus switch with reset, manufactured by NXP USA Inc.
- What is the operating voltage range of the PCA9546ABS,118? The operating power supply voltage range is from 2.3 V to 5.5 V.
- What is the clock frequency range of the PCA9546ABS,118? The clock frequency range is from 0 Hz to 400 kHz.
- Does the PCA9546ABS,118 support voltage level translation? Yes, it supports voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses.
- What types of packages are available for the PCA9546ABS,118? The device is available in SO16, TSSOP16, and HVQFN16 packages.
- How does the reset function work on the PCA9546ABS,118? The PCA9546ABS,118 has an active LOW reset input that resets the I2C-bus state machine and deselects all channels when pulled LOW.
- What is the temperature range for the PCA9546ABS,118? The operating temperature range is from -40°C to +85°C.
- Does the PCA9546ABS,118 have ESD protection? Yes, it exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
- Can the PCA9546ABS,118 support hot insertion? Yes, it supports hot insertion.
- How many devices can be connected on the I2C-bus using the PCA9546ABS,118? Up to 8 devices can be connected on the I2C-bus using the three address pins.
