Overview
The PCA9541PW03112, produced by NXP USA Inc., is a 2-to-1 I2C-bus master selector designed for high reliability in dual master I2C-bus applications. This component is particularly useful in systems where multiple masters need to share the same I2C-bus, ensuring smooth and reliable communication between devices. It features interrupt logic and a reset function, making it versatile for various system configurations.
Key Specifications
| Specification | Value |
|---|---|
| Number of Pins | 16 |
| Package Type | TSSOP16, SO16, HVQFN16 |
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Input Voltage Tolerance | 6.0 V |
| Clock Frequency | 0 Hz to 400 kHz |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM |
| Address Pins | 4 (allowing up to 16 devices on the I2C-bus) |
| Interrupt Inputs/Outputs | 1 active LOW interrupt input, 2 active LOW interrupt outputs |
| Reset Input | Active LOW |
Key Features
- 2-to-1 bidirectional master selector
- I2C-bus interface logic compatible with SMBus standards
- Channel selection via I2C-bus
- Bus initialization/recovery function
- Bus traffic sensor
- 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
- Software identical for both masters
- Low standby current
Applications
- High reliability systems with dual masters
- Gatekeeper multiplexer on long single bus
- Bus initialization/recovery for slave devices without hardware reset
- Allows masters without arbitration logic to share resources
Q & A
- What is the primary function of the PCA9541PW03112?
The PCA9541PW03112 is a 2-to-1 I2C-bus master selector designed to manage dual master I2C-bus applications. - What types of packages are available for the PCA9541PW03112?
The component is available in TSSOP16, SO16, and HVQFN16 packages. - What is the operating power supply voltage range for the PCA9541PW03112?
The operating power supply voltage range is from 2.3 V to 5.5 V. - Does the PCA9541PW03112 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 is the purpose of the interrupt inputs and outputs on the PCA9541PW03112?
The interrupt inputs and outputs are used to manage and signal bus control and recovery/initiation sequences between the masters and the downstream I2C-bus devices. - Can the PCA9541PW03112 handle hot insertion?
Yes, it supports hot insertion. - What is the significance of the bus traffic sensor in the PCA9541PW03112?
The bus traffic sensor generates an interrupt if a channel switch occurs during a non-idle bus condition, ensuring proper bus management. - How many address pins does the PCA9541PW03112 have?
The component has 4 address pins, allowing up to 16 devices on the I2C-bus. - What is the ESD protection level of the PCA9541PW03112?
The ESD protection exceeds 2000 V HBM, 200 V MM, and 1000 V CDM. - Is the PCA9541PW03112 compliant with SMBus standards?
Yes, it is compatible with SMBus standards.
