Overview
The PCA9541APW/03112, 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 multiple masters need to share the I²C-bus without arbitration logic. It features a robust design with interrupt logic, reset capabilities, and support for voltage level translation between different bus voltages.
Key Specifications
| Name | Value |
|---|---|
| Type | Parameter |
| Factory Lead Time | 7 Weeks |
| Mounting Type | Surface Mount |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Packaging | Tube |
| Part Status | Obsolete |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Voltage - Supply | 2.3V ~ 5.5V |
| Pin Count | 16 |
| Interface | I²C, SMBus |
| RoHS Status | ROHS3 Compliant |
| Clock Frequency | 0 Hz to 400 kHz |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 |
Key Features
- 2-to-1 bidirectional master selector
- I²C-bus interface logic; compatible with SMBus standards
- Active LOW reset input and internal Power-On Reset (POR) function
- Active LOW interrupt input and two active LOW interrupt outputs
- Channel selection via I²C-bus
- Bus initialization/recovery function and bus traffic sensor
- Low Ron switches and support for hot insertion
- Voltage level translation between 1.8 V, 2.5 V, 3.3 V, and 5 V buses
- Low standby current and 6.0 V tolerant inputs
- ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
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 PCA9541APW/03112 used for? The PCA9541APW/03112 is used as a 2-to-1 I²C-bus master selector in high reliability dual master I²C-bus applications.
- What is the package type of the PCA9541APW/03112? The package type is 16-TSSOP (0.173", 4.40mm Width).
- What is the voltage supply range for the PCA9541APW/03112? The voltage supply range is 2.3V to 5.5V.
- Is the PCA9541APW/03112 RoHS compliant? Yes, it is ROHS3 compliant.
- What is the clock frequency range of the PCA9541APW/03112? The clock frequency range is from 0 Hz to 400 kHz.
- Does the PCA9541APW/03112 support hot insertion? Yes, it supports hot insertion.
- What kind of ESD protection does the PCA9541APW/03112 have? It exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
- Can the PCA9541APW/03112 perform voltage level translation? Yes, it can translate between 1.8 V, 2.5 V, 3.3 V, and 5 V buses.
- What is the status of the PCA9541APW/03112? The part is currently obsolete.
- How many address pins does the PCA9541APW/03112 have? It has 4 address pins, allowing up to 16 devices on the I²C-bus.
