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KB9028QC

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The KB9028QC is a Nuvoton keyboard controller and embedded controller IC designed for notebook PC platforms. It integrates keyboard scan matrix decoding, PS/2 and I²C/SMBus interfaces, general-purpose I/O, PWM fan control, and ACPI-compliant power management functions. The 128-pin LQFP package provides extensive I/O for managing keyboard, touchpad, battery, thermal sensors, and power sequencing in x86 laptop and embedded computing platforms.

Stock & Date Code

Brand	Part Number	Qty	D/C	Note
Nuvoton	KB9028QC	3,840	25+	Nuvoton KB9028QC Interface IC; confirm date code, lot and packing condition by RFQ.

Listed stock and date code are subject to final RFQ confirmation.

MCU / Processor Specifications

Parameter	Value / Specification
Exact Part Number	KB9028QC
Manufacturer	Nuvoton Technology
Product Category	Embedded Controller
Protocol / Function	Notebook keyboard controller with embedded microcontroller, ACPI power management, keyboard scan matr , and system I/O ansion
Channels	Up to 18 × 8 keyboard scan matr , multiple PS/2 ports, I²C/SMBus, GPIO up to 80 pins, PWM fan control outputs
Data Rate	Internal 8051-compatible MCU core at up to 25 MHz, PS/2 interface at standard keyboard/mouse protocol rates, 400 kHz I²C/SMBus
Supply Voltage	3.3 V core supply, 1.8 V to 3.3 V I/O voltage range, ACPI S0-S5 power state management
On-Chip Memory	Embedded flash program memory and SRAM for keyboard controller firmware and customer-specific customization
Operating Temperature	0 °C to +70 °C
Package / Case	128-LQFP (14 × 14 mm, 0.4 mm pitch, SMT, Tray)

Embedded Processor Features & Applications

Notebook-grade keyboard controller and embedded controller with 8051-compatible MCU core at 25 MHz, integrating keyboard scan, power sequencing, and system management functions
Extensive I/O: 18 × 8 key scan matrix, multiple PS/2 ports, I²C/SMBus, up to 80 GPIO pins, ADC inputs, and PWM fan control outputs for complete laptop platform management
ACPI-compliant power management supporting S0–S5 states with wake-on-keyboard, lid switch detection, and battery charge control for notebook and embedded x86 systems
128-pin LQFP package (14 × 14 mm, 0.4 mm fine pitch) providing high I/O density in a compact footprint for thin-and-light notebook PCB designs
On-chip embedded flash and SRAM enable customer firmware customization without external memory, reducing BOM for cost-sensitive laptop and industrial PC platforms
Targets notebook PC keyboard and system controller, industrial panel PC EC, Chromebook platform controller, and embedded x86 single-board computers

Why Embedded Teams Source KB9028QC

Buyers normally source KB9028QC when an existing BOM requires the same manufacturer suffix for communication and interface board sourcing. For overseas buyers, the important confirmation points are stock reality, traceability, packing condition and shipment window. Suited to buyers needing the exact KB9028QC ordering code — the Interface IC in 128-LQFP (14 × 14 mm, 0.4 mm pitch, SMT, Tray) — rather than a generic part.

LimChip can confirm current price, date code, packing condition, lot traceability and shipment schedule for KB9028QC.

MCU / Processor Sourcing Checklist

Confirm exact suffix, package, memory option and temperature grade.
Check firmware, boot mode, peripheral compatibility and lifecycle status.
Verify quantity, traceability and 25+ for production or repair demand.

KB9028QC (Interface IC, tray) is offered from stock; live quantity and lot split are confirmed by RFQ.

Need Price & Availability for KB9028QC?

LimChip can confirm current price, date code, packing condition, lot traceability and shipment schedule for KB9028QC.

Listed stock is subject to final RFQ confirmation.

For faster RFQ confirmation, please include:

Required quantity
Target date code
Package / case requirement
Delivery country
Company name and contact person
Target price if available

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Quality, Shipping & Payment

Commercial and shipment details for KB9028QC are confirmed with the formal quotation.

Quality Confirmation

Date code, batch, package, label and marking details are checked before shipment. Inspection photos and third-party inspection support are available when required.

Shipping

LimChip supports worldwide delivery through established logistics providers. Carrier, lead time, tracking and buyer-appointed freight-forwarder requirements are confirmed by our sales team.

Payment

Payment method, currency and trade terms are confirmed in the formal quotation or proforma invoice. Contact our sales team for the options available for your order.

Frequently Asked Questions

Is KB9028QC available from LimChip?

LimChip can confirm current availability, price, quantity, date code and lead time for KB9028QC by RFQ.

What should buyers check before ordering KB9028QC?

Buyers should check exact suffix, package, memory option, firmware compatibility and lifecycle status for KB9028QC, together with live stock and traceable supply.

How do I request a quote for KB9028QC?

Use the RFQ button and include required quantity, target date code, package/case requirement, delivery country, company name and contact details.