NXP PCA9506DGG,518 40‑Bit I²C I/O Expander with Reset, OE, INT (TSSOP‑56)

The NXP PCA9506DGG,518 is a robust 40-bit I²C-bus I/O port expander housed in a compact 56-pin TSSOP surface-mount package. It supports both standard (100 kHz) and Fast-mode (400 kHz) I²C communication, with a flexible voltage of 2.3 V to 5.5 V, ideal for modern embedded and industrial systems.

Crucial Features and Benefits

• 40 Configurable I/O Pins: Organized into five banks of eight, each pin is programmable as input or output, enabling versatile I/O expansion.
• High Drive Capability: Totem-pole outputs can source up to 10 mA and sink up to 25 mA per pin, facilitating direct control of LEDs or interfacing with demanding digital loads.
• Power-On Reset (RESET) & Output Enable (OE): The RESET pin initializes all I/O as inputs at startup, while OE enables global 3-state control, supporting LED blinking or PWM dimming.
• Interrupt Function (INT): Features an open-drain, active‑LOW interrupt pin that signals input-state changes, with programmable masking and input polarity inversion for refined interrupt handling.
• Efficient I²C Interface: Compatible with both standard and Fast I²C modes, enabling flexible communication speeds.
• Low Power & Safe Operation: Idle standby current is very low (typically <15.5 µA), and the device includes live-insertion safety (IOFF, 3-state on power-up/down), noise filtering, and a robust state machine.
• Durable Construction: Operates reliably from 40 °C to +85 °C, with built‑in ESD protection exceeding industry standards.

Product Application Potential

The PCA9506DGG offers scalable and resilient I/O expandability for industrial, server, telecom, instrumentation, and IoT systems. With powerful output drive, flexible I²C control, built-in interrupt and reset features, and low-power standby, it's a compact yet high-performance solution for global B2B design needs.