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W83977AG-A
W83977AG-A
| Part Number | W83977AG-A |
|---|---|
| Manufacturer | Nuvoton Technology Corporation (Winbond) |
| Category | Integrated Circuits (ICs) > Interface – I/O Expanders / Specialized Super I/O Controllers |
| Description | High-performance Super I/O Controller featuring an ISA-compatible interface, dual full UARTs, multi-mode parallel port, floppy disk controller, and advanced hardware keyboard controller. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The W83977AG-A is a highly integrated Super I/O controller from Nuvoton (formerly Winbond), optimized for motherboards, industrial PCs, and legacy embedded systems. It combines standard PC peripherals into a compact package, interfacing with the host CPU via ISA or LPC bus. Integrated features include two 16550-compatible UARTs, an IEEE 1284 multi-mode parallel port, a floppy disk controller (FDC), an 8042-based keyboard/mouse controller, and programmable GPIO pins. Packaged in a lead-free LQFP-128, it ensures reliable, long-term operation and backward compatibility in POS terminals, embedded workstations, and industrial environments.
Core Advantages
Legacy Protocol Integration Bridge
Houses a comprehensive suite of vital legacy computing interfaces—such as high-speed serial, parallel, and floppy controllers—allowing modern industrial hardware designs to maintain full backward compatibility with older peripheral standards.
Highly Precise 16550-Grade Serial Speed
Features dual advanced UART ports equipped with internal 16-byte FIFO buffers, reducing data processing bottlenecks and preventing data loss during high-speed serial communication.
Flexible Configurable GPIO Extensions
Provides multiple programmable General Purpose I/O channels that grant system architects the flexibility to monitor external chassis status, trigger status LEDs, or implement custom logic routines easily.
Industry-Proven Robust Architecture
Built with excellent anti-interference and ESD protection performance, ensuring stable long-term operation on factory floors, in industrial networks and non-stop server environments.
Key Specifications
| Brand | Nuvoton / Winbond |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free Standard (Green Suffix “G”) |
| EDA/CAD Model | 3D Model & PCB Footprint Available upon request |
| Warranty | 1-Year Standard Factory Warranty |
| Package / Case | LQFP-128 (14×20 mm ) |
| Mounting Type | Surface Mount Technology (SMD/SMT) |
| Surface Marking / Silkscreen | W83977AG-A Marking |
| Controller Type | Super I/O Controller with Infrared Support |
| Host Bus Interface | ISA Bus / LPC Interface Standard Compatibility |
| Serial Ports (UART) | 2x 16550-compatible UARTs with 16-byte FIFO buffers |
| Parallel Port Subsystem | 1x Multi-Mode Parallel Port (supports SPP, EPP, and ECP modes) |
| Floppy Disk Controller | Integrated FDC (supports 360K, 720K, 1.2M, 1.44M, and 2.88M bit rates) |
| Keyboard Controller | Integrated 8042-based Keyboard and PS/2 Mouse Interface |
| I/O Expansion Lines | Programmable GPIO (General Purpose Input/Output) Channels |
| Operating Voltage Supply | 5.0 V DC (Core Logic and Driving Rails) |
| Operating Temperature Range | 0°C to +70°C (Standard Commercial Grade Specification) |
Typical Applications
- Industrial Personal Computers (IPC), Rackmount Servers, and Single Board Computers (SBC)
- Point-of-Sale (POS) Cash Registers, Ticket Dispensing Terminals, and Kiosk Systems
- Legacy Embedded Hardware Frameworks, CNC Machine Controllers, and Automation Monitors
- Automated Electronic Laboratory Test Benches and Dedicated Communication Gateways
- Medical Imaging Hardware Infrastructure requiring stable RS-232 / Parallel interface loops
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: Is your current stock inventory of the W83977AG-A entirely genuine and original?
A: Yes, we guarantee that all W83977AG-A ICs in our stock are 100% brand-new, original factory components from Nuvoton (Winbond), handled and stored in strict compliance with anti-static ESD shielding standards.
Q2: What is decoded by the specific characters “G” and “-A” in this part configuration?
A: The “G” identifier explicitly specifies that the component uses fully lead-free, RoHS-compliant environmental “Green” packaging materials. The “-A” suffix indicates the specific inner silicon design revision or performance tuning tier set by the manufacturer.
Q3: Does this Super I/O chip support advanced parallel port operating modes like EPP and ECP?
A: Yes, the integrated parallel port interface is fully IEEE 1284 compliant. It can be dynamically configured via internal configuration registers to operate in Standard Parallel Port (SPP), Enhanced Parallel Port (EPP), or Extended Capability Port (ECP) modes to maximize interface speed.
Q4: How can our engineering group request full register configuration maps, pin-out reference sheets, or volume wholesale quotations?
A: Please complete our Quick Inquiry web form on this page with details about your processing parameters. Our application support desk will process your inquiry and dispatch the available technical documentation package within 24 hours.
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