18 V Tolerant SPI 16-Bit GPI with Maskable INT

PCA9703

The PCA9703 is a low power 18 V tolerant SPI General Purpose Input (GPI) shift register designed to monitor the status of switch inputs. It generates an interrupt when one or more of the switch inputs change state but allows selected inputs to not generate interrupts using the interrupt masking feature. The input level is recognized as a HIGH when it is greater than 0.8 x VDD and as a LOW when it is less than 0.55 x VDD (minimum LOW threshold of 2.5 V at 5 V node). The PCA9703 can monitor up to 16 switch inputs.

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Block Diagram

PCA9703 Block Diagram

PCA9703 Block Diagram
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Features

  • 16 general purpose input ports
  • 18 V tolerant input ports with 100 kΩ external series resistor
  • Input LOW threshold 0.55 x VDD with minimum of 2.5 V at VDD = 4.5 V
  • Open-drain interrupt output
  • Interrupt enable pin (INT_EN) disables GPI pins and interrupt output
  • Interrupt-masking feature allows no interrupt generation from selected inputs
  • VDD range: 4.5 V to 5.5 V
  • IDD is very low 2.5 µA maximum
  • SPI serial interface with speeds up to 5 MHz
  • SPI supports daisy-chain connection for large switch numbers
  • AEC-Q100 compliance available
  • 18 V tolerant SPI 16-bit GPI with maskable INT
  • ESD protection exceeds 5 kV HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Operating temperature range: -40 °C to +125 °C
  • Offered in TSSOP24 and HWQFN24 packages

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