Overview
The PCA9541PW/02,112, produced by NXP USA Inc., is a 2-to-1 I²C-bus master selector designed for high-reliability dual master I²C-bus applications. This component is particularly useful in systems where continuous operation is crucial, even in the presence of multiple masters. It features advanced interrupt logic and reset capabilities, making it versatile for various I²C-bus configurations.
Key Specifications
| Parameter | Value |
|---|---|
| Voltage - Supply | 2.3 V to 5.5 V |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Interface | I2C, SMBus |
| Clock Frequency | 0 Hz to 400 kHz |
| Input Voltage Tolerance | 6.0 V tolerant inputs |
| 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 |
Key Features
- 2-to-1 bidirectional master selector
- I²C-bus interface logic; compatible with SMBus standards
- Active LOW interrupt input and two active LOW interrupt outputs
- Active LOW reset input and internal Power-On Reset (POR) function
- Four address pins allowing up to 16 devices on the I²C-bus
- 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 and 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/02,112?
The PCA9541PW/02,112 is a 2-to-1 I²C-bus master selector designed for high-reliability dual master I²C-bus applications. - What is the voltage supply range for this component?
The voltage supply range is from 2.3 V to 5.5 V. - What types of interfaces does it support?
It supports I²C and SMBus interfaces. - What is the clock frequency range?
The clock frequency range is from 0 Hz to 400 kHz. - Does it 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 kind of ESD protection does it have?
It exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101. - What is the package type for this component?
The package type is 16-TSSOP (0.173", 4.40mm Width). - Does it have interrupt and reset capabilities?
Yes, it has active LOW interrupt input, two active LOW interrupt outputs, and an active LOW reset input. - What is the purpose of the bus initialization/recovery function?
The bus initialization/recovery function helps in initializing or recovering the bus for slave devices without the need for a hardware reset. - Is it suitable for hot insertion?
Yes, it supports hot insertion.
