NXP PCA9536DP 4-Bit I²C-Bus I/O Expander, TSSOP Package

The NXP PCA9536DP 4-Bit I²C-Bus I/O Expander is a TSSOP package integrated circuit that adds four configurable I/O lines to microcontroller-based systems through a two-wire serial interface.

The PCA9536DP is a 4-bit CMOS I²C-bus and SMBus I/O port designed to provide general-purpose parallel input/output (GPIO) expansion. It adds capability to a system without consuming valuable processor pins, which is useful where additional I/O is needed for peripherals.

Key Features

• Four configurable I/O lines, each set as an input or an output by the system master
• Polarity inversion register to invert the input logic level for active-high and active-low devices
• Noise filter on the SCL and SDA input lines for improved communication reliability in electrically noisy environments
• No glitch during power-up, with an internal power-on reset circuit for predictable initialisation
• Low standby current for power-sensitive designs
• Compact TSSOP (Thin Shrink Small Outline Package)

Register Set

The device uses a flexible register set comprising a 4-bit configuration register, a 4-bit input port register, a 4-bit output port register, and a 4-bit polarity inversion register. The system master can configure each of the four I/O pins as an input or an output through a simple two-wire serial interface.

Applications

The PCA9536DP is suited to a wide range of electronic applications where additional digital control or monitoring lines are required. Typical uses include interfacing with ACPI power switches and connecting sensors, switches, or LEDs in I²C-bus or SMBus systems.

Specifications

• Package: TSSOP
• Width: 3.3
• Depth: 1.5
• Height: 4.3
• Weight: 0.091 gm

Choose the NXP PCA9536DP 4-Bit I²C-Bus I/O Expander when you need four additional configurable I/O lines over a simple two-wire I²C-bus or SMBus interface without consuming additional processor pins.