PCA9704PWJ

PCA9704PWJ is a low-power 18V tolerant SPI general purpose input (GPI) with a maskable (active low) INT 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 2.5V at 5V node). The PCA9704 can monitor up to 8 switch inputs. The falling edge of the CS pin samples the input port status and clears the interrupt. When CS is LOW, the rising edge of the SCLK loads the shift register and shifts the value out of the shift register. The application includes body control modules, electronic control units (for example, for body controller), switch monitoring, SBC wake pin extension, industrial equipment, cellular telephones, and emergency lighting.

• 8 general purpose input ports, 18V tolerant input ports with 100Kohm external series resistor
• 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
• Supply voltage range from 4.5 to 5.5V (Vss = 0V, Tamb = -40°C to +125°C)
• Supply current is 1.0µA typ (VDD = 5.5V, input = 5V or 18V, INT-EN = VDD)
• SPI serial interface with speeds up to 5MHz
• SPI supports daisy-chain connection for large switch numbers
• ESD protection exceeds 5kV HBM per JESD22-A114 and 1000V CDM per JESD22-C101
• Supply voltage range from 4.5 to 5.5V (Tamb = -40°C to +125°C)
• TSSOP16 package, ambient temperature range from -40°C to +125°C