WPC8763LDG - Embedded Controller IC QFP-128 | Winbond
MPN: WPC8763LDG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.66 | $1.66 |
| 10 | $1.49 | $14.90 |
| 100 | $1.32 | $132.00 |
| 500 | $1.16 | $580.00 |
| 1,000 | $1.07 | $1,070.00 |
WPC8763LDG Overview
An embedded controller is a specialized microcontroller that operates semi-independently of the host CPU to manage low-level platform functions. In the PC system hierarchy, the EC sits below the main CPU and chipset (PCH) as a power-management IC tier: it handles keyboard matrix scanning, battery charging supervision, thermal monitoring, fan speed control, and lid/power-button events, typically following Intel or AMD platform EC firmware specifications such as those used with ACPI and eSPI/KBC interfaces.
The WPC8763LDG belongs to Winbond's WPC876x family of embedded controllers, which integrates an 8-bit or proprietary MCU core with on-chip flash/ROM program memory, keyboard controller (KBC) logic, GPIO, PWM channels for fan control, and ADC inputs for thermal and voltage monitoring. Key differentiating features of this family include the high GPIO count required for notebook keyboard matrices, integrated PWM fan controllers that reduce external component count, and low standby power consumption for battery-operated systems. The 128-pin QFP package provides sufficient I/O for a full notebook EC implementation on a single chip.
Architecturally, EC devices like the WPC8763LDG combine a low-power MCU core, a shared RAM region, dedicated peripheral blocks (PS/2 keyboard interface, SMBus/I2C masters for battery and thermal IC communication, pulse-width modulators, and watchdog timers), and boot ROM. Firmware executes from internal non-volatile memory, and the EC communicates with the chipset over LPC or eSPI buses depending on platform generation.
Typical applications include laptop and notebook motherboard EC functions, keyboard/mouse controller emulation (PS/2 KBC/Mouse), battery charging management in coordination with a charger IC, thermal and acoustic (fan) management, and general-purpose GPIO expansion in portable and industrial embedded systems.
A key design consideration is firmware compatibility: the EC must run BIOS-coordinated firmware, so replacing this device requires both hardware pin compatibility and firmware/toolchain support - verify code image compatibility before any substitution.
This page synthesizes distributor stock and pricing data, package information, and sourcing guidance not consolidated in the manufacturer's public datasheet listing.
Drop-in alternatives for WPC8763LDG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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WPC8763LDG
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.07 / Unit
View Datasheet →WPC8763LDG Maximum Ratings & Electrical Characteristics
| Manufacturer | Winbond Electronics Corporation |
| Product Type | Embedded Controller (EC) IC / Specialized IC |
| Package | QFP-128 |
| Mounting Type | Surface Mount |
WPC8763LDG qfp-128 Pin Configuration Guide
Pin configuration for WPC8763LDG (qfp-128 package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for WPC8763LDG.
Refer to the datasheet for full pin configuration.
Typical Applications
WPC8763LDG is suitable for 6 applications: Notebook Embedded Controller (EC), Keyboard Controller (KBC) Emulation, Thermal and Fan Management, Battery Charging Supervision, Power Sequencing and Rails Supervision, Industrial and Embedded Platform Control.
Notebook Embedded Controller (EC)
The WPC8763LDG serves as the primary embedded controller on notebook motherboards, where it manages keyboard matrix scanning, power-button and lid events, battery charging supervision, thermal monitoring, and PWM fan control independently of the host CPU. Its high GPIO count in the 128-pin QFP package supports a full notebook keyboard matrix plus system GPIO expansion on a single chip. Placed on the LPC or eSPI bus to the chipset, the EC runs vendor firmware that implements ACPI-defined power states; a key benefit is that platform standby power remains in the milliamp range because the EC keeps running when the main CPU is off.
Recommended
Keyboard Controller (KBC) Emulation
As a keyboard controller, the WPC8763LDG scans the notebook keyboard matrix, debounces keys, and emulates the legacy PS/2 KBC interface toward the chipset. The 128-pin QFP-128 footprint provides enough I/O for an 18x8-style matrix plus pointing-device lines without external scan logic. Firmware-driven scanning allows flexible matrix remapping per product SKU. Performance consideration: scan rates must be fast enough (sub-millisecond debounce) to avoid missed keystrokes while keeping the EC core in low-power idle between scans to preserve battery life in suspend states.
Recommended
Thermal and Fan Management
The WPC8763LDG reads temperature sensors over SMBus/I2C and drives PWM outputs that control notebook cooling fans, implementing multi-zone fan curves defined in EC firmware. Using the EC rather than the main CPU for fan control guarantees that cooling continues during BIOS setup, OS installation, and thermal-throttling events when the OS is unresponsive. The design trade-off is acoustic tuning: PWM frequency and ramp rates programmed in firmware must balance noise against temperature overshoot, and tachometer inputs on the EC provide closed-loop speed verification for reliability monitoring.
Recommended
Battery Charging Supervision
In notebook power subsystems, the WPC8763LDG acts as the supervisory controller for the battery charger and fuel gauge, communicating over SMBus with smart-battery ICs per the SBS model. The EC enforces charge-current and charge-voltage limits, detects adapter insertion via ACIN GPIO, and sequences the power path between adapter and battery. Performance consideration: firmware polling intervals and charger IC command timing must respect SMBus 100 kHz limits, and the EC must handle charger fault interrupts within milliseconds to protect the battery pack from overcharge conditions.
Recommended
Power Sequencing and Rails Supervision
The WPC8763LDG sequences the notebook's multiple voltage rails, enabling LDOs and DC-DC converters in the order required by the CPU and chipset, and monitoring power-good signals to detect fault conditions. Its GPIO and timer resources implement soft-power (power-button) behavior, suspend/resume rail ordering, and hard-reset issuance on sequencing faults. Correct sequencing is critical: an out-of-order rail can latch up the chipset, so firmware rail-delay tables must be validated against the platform power specification, and the watchdog function resets the sequence on a hung power-good signal.
Recommended
Industrial and Embedded Platform Control
Beyond notebooks, the WPC8763LDG's embedded-controller architecture (MCU core, flash program memory, PWM, ADC, SMBus, and abundant GPIO) suits embedded industrial boards needing a dedicated low-level management processor - front-panel keypads, fan and thermal control in network appliances, and chassis management in storage systems. The QFP-128 package is hand-reworkable for low-volume industrial builds, a practical advantage over BGA EC packages. Designers should budget for firmware development effort, since EC value in these roles comes almost entirely from the firmware image rather than raw silicon performance.
Recommended
Recommended Products Summary
Engineering reference data for WPC8763LDG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | WPC876x family variants |
|---|---|---|
| Package | QFP-128 | QFP-128 (same family footprint) |
| Brand | Winbond Electronics | Winbond Electronics |
| Product Type | Embedded Controller (EC) specialized IC | Embedded Controller (EC) specialized IC |
| Typical Application | Notebook EC / keyboard / thermal-fan control | Notebook EC / keyboard / thermal-fan control |
Key Differentiators
- Single-chip EC integration in QFP-128 (vs Discrete KBC + fan controller + GPIO expander solution)
- Repair-market availability at low unit cost (vs Newer-generation EC (eSPI-only) parts)
- Same-family substitution path (vs Cross-brand EC (e.g., Nuvoton NPCE78x))
Design Notes
The WPC8763LDG is firmware-dependent: hardware replacement alone does not restore function. The EC must be flashed with the exact firmware image matched to the board's BIOS/platform specification. When servicing a notebook board, dump and archive the original EC firmware before removing the device, and verify the replacement's die revision accepts the same image. Mismatched EC firmware causes boot failure, dead keyboard, or incorrect fan behavior even when the chip is electrically perfect.
For QFP-128 rework, use hot-air with a properly sized nozzle (approximately 20 x 20 mm) and preheat the board from below to 130-150 C to avoid warpage and pad lifting. Apply flux under the leads and verify all 128 joints with magnification or X-ray; QFP lead coplanarity issues after removal are the most common cause of intermittent EC faults. Follow IPC-A-610 workmanship criteria for lead inspection on repair work.
The EC operates across the full power-state range of the platform, from full-on to deep suspend, so its supply filtering must cover both active switching noise and standby ripple. Decouple each supply pin group of the QFP-128 with 100 nF ceramics placed within 2 mm of the pin, plus bulk 10 uF per rail. Estimated: with a typical EC operating current in the tens of milliamps at 3.3 V, dissipation is well under 0.2 W, so no dedicated thermal copper is needed - focus layout effort on clean standby-rail routing instead.
Compliance Information
Distributor data (IC-Components) lists RoHS/Lead Free status fields without a definitive value; compliance certificates must be requested from Winbond or the supplying distributor.
