Overview
The PCA9701PW is a low-power, 18 V tolerant SPI General Purpose Input (GPI) shift register designed by NXP Semiconductors (formerly Freescale Semiconductor). This component is engineered to monitor the status of switch inputs and generate an interrupt when one or more of the switch inputs change state. It is particularly useful in applications requiring robust input monitoring and high voltage tolerance.
Key Specifications
| Parameter | Description | Min | Max | Unit | |
|---|---|---|---|---|---|
| Number of Input Ports | 16 | ||||
| Input Voltage Tolerance | 18 V | V | |||
| Input LOW Threshold | 0.4 V | V | |||
| Input HIGH Threshold | 0.7 VDD | V | |||
| Supply Voltage Range | 2.5 V | 5.5 V | V | ||
| Maximum Input Clock Frequency | 5 MHz | Hz | |||
| Operating Temperature Range | -40°C | 125°C | °C | ||
| ESD Protection | 8 kV HBM, 350 V MM, 1000 V CDM | ||||
| Package Type | TSSOP24 |
Key Features
- 16 general purpose input ports (PCA9701) or 8 general purpose input ports (PCA9702)
- 18 V tolerant input ports with 100 kΩ external series resistor
- Open-drain interrupt output
- Interrupt enable pin (INT_EN) to disable interrupt output
- SPI serial interface with speeds up to 5 MHz
- ESD protection exceeds 8 kV HBM, 350 V MM, and 1000 V CDM
- Latch-up testing exceeds 100 mA according to JEDEC Standard JESD78
Applications
- Body control modules
- Switch monitoring
- Industrial equipment
- Cellular telephones
- Emergency lighting
- SBC wake pin extension
Q & A
- What is the PCA9701PW used for?
The PCA9701PW is used to monitor the status of switch inputs and generate an interrupt when one or more of the switch inputs change state.
- How many input ports does the PCA9701PW have?
The PCA9701PW has 16 general purpose input ports.
- What is the input voltage tolerance of the PCA9701PW?
The PCA9701PW has an input voltage tolerance of up to 18 V with a 100 kΩ external series resistor.
- What is the operating temperature range of the PCA9701PW?
The operating temperature range is from -40°C to +125°C.
- What type of interface does the PCA9701PW use?
The PCA9701PW uses an SPI serial interface with speeds up to 5 MHz.
- What kind of ESD protection does the PCA9701PW have?
The PCA9701PW has ESD protection that exceeds 8 kV HBM, 350 V MM, and 1000 V CDM.
- What is the package type of the PCA9701PW?
The PCA9701PW is available in a TSSOP24 package.
- Can the PCA9701PW be used in automotive applications?
- How does the interrupt output work on the PCA9701PW?
The interrupt output is asserted when an input port status changes and can be enabled or disabled using the INT_EN pin.
- Can multiple PCA9701PW devices be connected serially?
