NXP Semiconductors PCAL9722 Ultra Low-Voltage 22-bit I/O Expanders

NXP Semiconductors PCAL9722 Ultra Low-Voltage 22-bit I/O Expanders offer remote I/O expansion for microcontroller families via the SPI interface. These expanders feature a built-in level shifting that makes devices highly flexible in mixed power supply systems where communication between incompatible I/O voltages is required. The PCAL9722 ultra low-voltage 22-bit I/O allows direct connection to a microcontroller operating down to 1.1V. Typical applications include IoT, industrial controllers, LED driving devices, building automation, telecom equipment, routers, servers, personal electronics, gaming consoles, and computers.

Features

22-bit GPIO with SPI
Highly configurable Agile I/O:
- Push-pull or open-drain outputs
- Interrupt status registers
- Four different output drive strengths
- Enable and resistor selector for pull-up and pull-down resistors
- Interrupt mask options

Robust:
- Schmitt trigger action allows slow input transition and better switching noise immunity
- 5.5V tolerant I/O ports and SPI bus pins
- Noise filter on SPI inputs
- Latch-up performance exceeds 100mA per JESD 78, class II
ESD protection exceeds JESD 22:
- 2000V Human-Body Model (HBM) (A114-A)
- 1000V Charged Device Model (CDM) (C101)

Specifications

5MHz SPI bus
Allows bidirectional voltage-level translation and GPIO expansion between 1.1V to 5.5V on SPI and 1.8V, 2.5V, 3.3V, and 5.5V on port P
1.1V to 5.5V operating power supply voltage range on the SPI bus side

Latched outputs with 25mA drive maximum capability for directly driving LEDs
2μA typical at 3.3V V_DD low standby current consumption

Applications

Industrial
Communication
Computing and consumer

NXP Semiconductors PCAL9722 Ultra Low-Voltage 22-bit I/O Expanders

Features

Specifications

Applications

Block Diagram

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