PCA9701HF,118

I/o Expanders Overview

The PCA9701HF,118 is a low-power 18 V tolerant SPI General Purpose Input (GPI) shift register designed to monitor switch inputs. It features 16 GPI ports and generates an interrupt when input states change. The device operates with a supply voltage range of 2.5 V to 5.5 V and supports SPI speeds up to 5 MHz. It includes an open-drain interrupt output and an interrupt enable pin. The part is housed in an HWQFN24 package and functions within a temperature range of -40 °C to +125 °C.

I/o Expanders Feature Summary

• 18 V tolerant input ports with integrated ESD protection
• Open-drain interrupt output with enable control
• Low power consumption with maximum IDD of 2.5 µA
• SPI serial interface supporting up to 5 MHz clock speed

I/o Expanders Applications

• Body control modules
• Switch monitoring
• Industrial equipment
• Cellular telephones
• Emergency lighting

I/o Expanders Procurement Notes

Verify the specific ordering suffix

I/o Expanders Selection Notes

Select this component for applications requiring high-voltage tolerance on input lines without external level shifting. Ensure the design accommodates the HWQFN24 package thermal requirements by connecting the exposed pad to ground. Confirm that the system logic levels align with the specified VIL and VIH thresholds relative to the operating VDD.

I/o Expanders Part Context

This part belongs to the PCA9701/PCA9702 family of 18 V tolerant GPIs. The PCA9701 variant provides 16 input channels, whereas the PCA9702 offers 8. Both share similar electrical characteristics but differ in pin count and package options. The HF suffix specifically denotes the HWQFN24 package variant.

I/o Expanders Replacement Considerations

Pin-compatible alternatives include the PCA9703 and PCA9704, which feature interrupt masking capabilities and higher ground offset thresholds.