PCA9505DGGY

Overview

The PCA9505DGGY is a 40-bit I2C-bus I/O port expander 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). At 5 V, outputs source 10 mA and sink 15 mA with a total package load of 600 mA. The device includes internal 100 kΩ pull-up resistors on all I/Os. It features an active LOW interrupt output, an active LOW output enable pin for 3-stating outputs, and three address select pins allowing up to eight devices on the same bus. All I/Os default to inputs at power-up.

Feature Summary

• Includes 100 kΩ internal pull-up resistors on all I/O ports
• Active LOW output enable pin allows 3-stating all outputs simultaneously
• Open-drain active LOW interrupt output monitors input logic level changes
• Designed for live insertion with IOFF circuitry and power-up 3-state protection

Applications

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

Procurement Notes

Verify the ordering suffix 'Y' indicates dry pack packaging when sourcing from distributors. Confirm the TSSOP56 package type matches the design requirements. Ensure the component meets the specified industrial temperature range of -40 °C to +85 °C. Cross-reference the manufacturer part number with official NXP documentation to confirm availability and authenticity before procurement.

Selection Notes

Select this component over the PCA9506 variant specifically because it integrates 100 kΩ internal pull-up resistors on all I/Os. This feature eliminates the need for external pull-up components, simplifying the schematic and reducing board space. Verify that the 40-bit expansion capacity and I2C interface compatibility align with the system controller's available resources and bus topology requirements.

Part Context

The PCA9505DGGY belongs to the PCA9505/PCA9506 series of 40-bit I/O expanders. It is functionally identical to the PCA9506 except for the inclusion of internal pull-up resistors. The 'DGGY' designation specifies the TSSOP56 plastic thin shrink small outline package with dry pack handling. It serves as a drop-in replacement for the discontinued PCA9505DGG part.

Replacement Considerations

The PCA9505DGGY is documented as a drop-in replacement for the PCA9505DGG. Both parts share the same TSSOP56 package and functional specifications. When substituting, ensure the new inventory adheres to the dry pack storage requirements indicated by the 'Y' suffix.