Overview
The PCA9541PW/03,112 is a 2-to-1 I²C-bus master selector produced by NXP USA Inc. This component is designed for high-reliability dual master I²C-bus applications, ensuring system operation even in complex environments. It features advanced interrupt logic and reset capabilities, making it suitable for a variety of applications requiring robust I²C-bus management.
Key Specifications
| Specification | Value |
|---|---|
| Package | 16-TSSOP (0.173", 4.40mm Width) |
| Interface | I²C, SMBus |
| Mounting Type | Surface Mount |
| Operating Power Supply Voltage | 2.3 V to 5.5 V |
| Input Voltage Tolerance | 6.0 V tolerant inputs |
| Clock Frequency | 0 Hz to 400 kHz |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101 |
| Latch-up Testing | Exceeds 100 mA per JEDEC Standard JESD78 |
| Address Pins | 4 address pins allowing up to 16 devices on the I²C-bus |
| Reset Input | Active LOW reset input |
| Interrupt Inputs/Outputs | 1 active LOW interrupt input, 2 active LOW interrupt outputs |
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
- Allows 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 PCA9541PW/03,112 used for?
The PCA9541PW/03,112 is used as a 2-to-1 I²C-bus master selector in high-reliability dual master I²C-bus applications. - What package types are available for the PCA9541PW?
The PCA9541PW is available in 16-TSSOP, SO16, and HVQFN16 packages. - What is the operating power supply voltage range for the PCA9541PW?
The operating power supply voltage range is from 2.3 V to 5.5 V. - Does the PCA9541PW support voltage level translation?
Yes, it allows 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 PCA9541PW?
The interrupt inputs and outputs are used to manage and signal bus control and recovery/initiation sequences. - Is the PCA9541PW ESD protected?
Yes, it exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101. - Can the PCA9541PW handle hot insertion?
Yes, it supports hot insertion. - How many devices can be connected on the I²C-bus using the PCA9541PW?
Up to 16 devices can be connected using the 4 address pins. - What is the function of the bus traffic sensor in the PCA9541PW?
The bus traffic sensor generates an interrupt if a channel switch occurs during a non-idle bus condition. - Is the PCA9541PW still in production?
No, the PCA9541PW is no longer manufactured.
