The PCA9536 is a remote 4-bit I2C and SMBus I/O expander with configuration registers from TI. It can be configured as inputs or outputs, has low standby current consumption, no glitch on power up, can directly drive LEDs, supports 5V tolerant I/O ports and has ESD protection.
The PCA9536 is a remote 4‑bit I²C and SMBus I/O expander with configurable input/output ports and polarity inversion. It operates from 2.3 V to 5.5 V and features low standby current, high‑current drive for LEDs, and robust ESD protection.
The document includes package options, register maps, bus transaction timing, and mechanical dimensions, along with ordering information and regulatory notices. It is intended for designers integrating the device into microcontroller‑based systems.
| Operating voltage range | 2.3 V to 5.5 V |
|---|---|
| Standby current consumption | 1 pA max |
| Maximum I²C bus speed | 400 kHz |
| I/O port voltage tolerance | 5 V tolerant |
| ESD protection (Human‑Body Model) | 2000 V |
| Latch‑up performance | Exceeds 100 mA per JESD78 Class II |
| Number of I/O pins | 4 (P0‑P3) |
The device operates from 2.3 V to 5.5 V.
It provides four I/O pins, labeled P0 through P3.
The standby current consumption is 1 pA maximum.
The PCA9536 supports up to 400 kHz I²C bus speed.