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
- ESD protection exceeds JESD 22:
- 2000V Human-Body Model (HBM) (A114-A)
- 1000V Charged Device Model (CDM) (C101)
- 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
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 VDD low standby current consumption
Applications
- Industrial
- Communication
- Computing and consumer
Block Diagram
Videos
Related Development Tool
NXP Semiconductors PCAL9722HN-ARD I/O Expander Evaluation Board
Designed to help evaluate the PCAL9722, an ultra-low-voltage translating 22-bit SPI I/O expander.
Published: 2023-11-21
| Updated: 2024-08-29