Overview
The PCA9641BSHP, produced by NXP USA Inc., is a 2-to-1 I2C master demultiplexer with an arbiter function. This device is designed for high reliability dual master I2C-bus applications, ensuring correct system operation even when two I2C-bus masters issue commands simultaneously. The arbiter function selects a winning master and allows the losing master to take control of the I2C-bus after the winning master has finished its operation. This component is particularly useful in systems that require robust and reliable I2C-bus management.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Power Supply Voltage | 2.3 V to 3.6 V |
| I/O Pin Tolerance | 3.6 V |
| Clock Frequency | Up to 1 MHz |
| ESD Protection | 6000 V HBM, 1000 V CDM |
| Latch-up Testing | Exceeds 100 mA (JEDEC Standard JESD78) |
| Package Types | TSSOP16, HVQFN16 |
| Temperature Range | -40°C to +85°C |
| Reset Input | Active LOW reset input |
Key Features
- 2-to-1 bidirectional master selector
- Channel selection via I2C-bus
- I2C-bus interface logic compatible with SMBus standards
- External pull-up resistors required for bus voltage level
- Queued requests for downstream bus access
- ESD protection and latch-up testing compliance
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 PCA9641BSHP? The PCA9641BSHP is a 2-to-1 I2C master demultiplexer with an arbiter function, designed for high reliability dual master I2C-bus applications.
- What is the operating power supply voltage range of the PCA9641BSHP? The operating power supply voltage range is 2.3 V to 3.6 V.
- What is the maximum clock frequency supported by the PCA9641BSHP? The maximum clock frequency supported is up to 1 MHz.
- What type of ESD protection does the PCA9641BSHP offer? The PCA9641BSHP offers ESD protection exceeding 6000 V HBM and 1000 V CDM.
- What are the package types available for the PCA9641BSHP? The available package types are TSSOP16 and HVQFN16.
- How does the arbiter function work in the PCA9641BSHP? The arbiter function selects a winning master when two masters issue commands simultaneously, allowing the losing master to take control of the I2C-bus after the winning master has finished its operation.
- What is the temperature range for the PCA9641BSHP? The temperature range is -40°C to +85°C.
- Does the PCA9641BSHP have internal pull-up resistors? No, the PCA9641BSHP does not have internal pull-up resistors; external pull-up resistors are required.
- How does the reset input work on the PCA9641BSHP? The PCA9641BSHP has an active LOW reset input that initializes the device to its default state.
- What are some typical applications of the PCA9641BSHP? Typical applications include high reliability systems with dual masters, gatekeeper multiplexers on long single buses, and bus initialization/recovery for slave devices without hardware reset.
