Overview
The PCA9541PW/02,118 is a 2-to-1 I²C-bus master selector developed and manufactured by NXP USA Inc. This component is designed for high reliability in dual master I²C-bus applications, ensuring seamless communication between different voltage level devices. It features interrupt logic and reset capabilities, making it versatile for various system configurations.
Key Specifications
| Parameter | Value |
|---|---|
| Interface | I²C, SMBus |
| Supply Voltage | 2.3 V to 5.5 V |
| Package Type | 16-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Clock Frequency | 0 Hz to 400 kHz |
| Input Voltage Tolerance | 6.0 V tolerant inputs |
| ESD Protection | Exceeds 2000 V HBM, 200 V MM, 1000 V CDM |
| Address Pins | 4 address pins (allowing up to 16 devices on the I²C-bus) |
Key Features
- 2-to-1 bidirectional master selector
- I²C-bus interface logic compatible with SMBus standards
- Active LOW interrupt input and 2 active LOW interrupt outputs
- Active LOW reset input and internal Power-On Reset (POR) function
- Channel selection via I²C-bus
- Bus initialization/recovery function and 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 and 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 PCA9541PW/02,118? The PCA9541PW/02,118 is a 2-to-1 I²C-bus master selector designed for high reliability in dual master I²C-bus applications.
- What are the supported voltage levels for this component? It supports voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses.
- What is the clock frequency range of the PCA9541PW/02,118? The clock frequency range is from 0 Hz to 400 kHz.
- Does the PCA9541PW/02,118 support hot insertion? Yes, it supports hot insertion.
- What type of reset does the PCA9541PW/02,118 have? It has an active LOW reset input and an internal Power-On Reset (POR) function.
- How many address pins does the PCA9541PW/02,118 have? It has 4 address pins, allowing up to 16 devices on the I²C-bus.
- What is the package type of the PCA9541PW/02,118? The package type is 16-TSSOP (0.173", 4.40mm Width).
- Is the PCA9541PW/02,118 RoHS compliant? Yes, it is RoHS compliant and lead-free.
- What is the ESD protection level of the PCA9541PW/02,118? It exceeds 2000 V HBM, 200 V MM, and 1000 V CDM.
- Can the PCA9541PW/02,118 handle different bus voltages? Yes, it allows voltage level translation between different bus voltages without additional protection.
