W83977AG-A

Specialized Overview

The W83977AG-A is an integrated I/O controller interface IC manufactured by Nuvoton Technology Corporation. It operates at a supply voltage of 5 V and supports both parallel and serial interfaces. The component is housed in a 128-BFQFP package with dimensions of 14x20 mm, designed for surface mount installation. It functions as a specialized interface device featuring an integrated watchdog timer. The device is rated for commercial temperature ranges, operating between 0°C and +70°C. It complies with RoHS3 standards and has a moisture sensitivity level of 3 (168 hours). The part status is officially listed as discontinued.

Specialized Feature Summary

• Integrated I/O controller functionality combining FIR, RTC, and AMI keyboard firmware support
• Supports both parallel and serial communication interfaces
• Includes built-in watchdog timer for system reliability

Specialized Applications

• AMI Keyboard Firmware implementation
• FIR (Fast Infrared) interface control
• Real-Time Clock (RTC) integration in legacy systems

Specialized Procurement Notes

Verify component authenticity through authorized channels due to discontinued status. Confirm package integrity and moisture sensitivity handling requirements before assembly. Check for valid replacement alternatives from the manufacturer or qualified third-party sources. Ensure compliance with current environmental regulations such as RoHS3. Validate pin compatibility if substituting in existing designs.

Specialized Selection Notes

Select this component only for legacy designs requiring specific AMI keyboard and FIR interface support. Verify that the 128-QFP footprint matches the PCB layout constraints. Consider the 5V supply requirement and commercial temperature range limitations. Evaluate end-of-life implications for long-term production stability. Assess available replacement options if redesigning for new products.

Specialized Part Context

The W83977AG-A belongs to the W83977 series of input/output controller interface ICs from Nuvoton. It is part of a family of specialized interface chips designed for older PC architecture peripherals. The AG suffix typically denotes specific package and temperature grade variations within the series. This component serves as a bridge between system controllers and legacy I/O devices.

Specialized Replacement Considerations

No public confirmed substitute part numbers are available. Consult Nuvoton technical support for potential obsolescence management options.