PCA9506DGG,518

I/o Expanders Overview

The PCA9506DGG,518 is a 40-bit I2C-bus I/O expander from NXP Semiconductors, organized in five banks of eight I/Os. It operates within a supply voltage range of 2.3 V to 5.5 V and supports standard mode (100 kHz) and fast mode (400 kHz) communication. The device features an active LOW output enable pin that three-states outputs, an open-drain interrupt output for monitoring input changes, and an active LOW reset pin. Unlike the PCA9505, it lacks internal pull-up resistors on its I/Os to minimize power consumption. All 40 I/O pins default to inputs at power-up.

I/o Expanders Feature Summary

• Provides 40 configurable I/O ports organized into five independent banks with individual direction control.
• Features an active LOW output enable pin that globally three-states all configured outputs.
• Includes an open-drain interrupt output that signals logic level changes on masked input pins.
• Supports live insertion with built-in noise filtering and robust state machine protection.

I/o Expanders Applications

• Servers
• RAID systems
• Industrial control
• Medical equipment
• PLCs

I/o Expanders Procurement Notes

Verify the specific ordering suffix ',518' against official documentation to confirm dry pack status and reel specifications. Ensure the TSSOP56 package variant matches the required footprint and pitch dimensions. Cross-reference the manufacturer part number with authorized distributor listings to validate authenticity and traceability before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when low standby current is critical, as it omits the internal pull-up resistors found in the PCA9505. It is suitable for applications requiring direct LED driving or push-pull driver interfacing without internal loading. Verify that external pull-up resistors are provided if the I/Os are used as inputs connected to open-drain devices.

I/o Expanders Part Context

This device belongs to the PCA9505/PCA9506 series of 40-bit I/O expanders designed for I2C-bus applications. It shares identical functionality with the PCA9505 except for the absence of internal pull-up resistors. The DGG suffix indicates the TSSOP56 plastic thin shrink small outline package with a 6.1 mm body width and 0.5 mm lead pitch.

I/o Expanders Replacement Considerations

The PCA9505DGGY is documented as a drop-in replacement for the PCA9505DGG. For the PCA9506, verify if the PCA9506BS HVQFN56 package variant serves as a physical alternative if board space permits re-layout. No other direct functional substitutes are explicitly listed in the provided data.