The MEC1515H-D0-I/NB from Microchip Technology is a notebook keyboard and embedded controller intended for use as the EC/KBC on computing-system motherboards. It manages functions such as system power sequencing, power-button operation, keyboard scanning, fan control, thermal monitoring, battery and adapter status, and communication with low-speed platform peripherals. Microchip’s published document title identifies the MEC1515 as a keyboard and embedded controller for notebook PCs.
The device is based on a 32-bit Arm Cortex-M4 processor core. Microchip’s official MEC15xx device-support pack specifically lists the MEC1515H_D0_NB and identifies 224KB of on-chip RAM for embedded-controller firmware, system-state data, and peripheral-control tasks.
The MEC1515 communicates with the system host or platform controller through an eSPI interface. Public notebook schematics using this exact device show eSPI clock, chip-select, reset, alert, and four bidirectional data signals for host-to-EC communication.
Available board-control resources include I²C/SMBus, PECI or SB-TSI thermal communication, UART, PS/2, ADC inputs, PWM outputs, fan-tachometer inputs, LED control, and JTAG debugging signals. These interfaces support battery chargers, fuel gauges, temperature sensors, touchpads, cooling fans, indicator LEDs, and other notebook peripherals. Most pins are multiplexed, so the active function depends on firmware and motherboard configuration.
Public pin information shows KSI keyboard inputs and KSO keyboard outputs capable of implementing an approximately 18×8 keyboard scan matrix. Multiple PWM and tachometer resources support closed-loop control of one or more cooling fans.
The controller also provides analog-monitoring and platform-control resources. Published designs expose ADC00 through ADC07, comparator functions, system-power status, PROCHOT, reset, shutdown, and power-good signals for centralized notebook power and thermal management.
The MEC1515H-D0-I/NB is used in a 132-terminal DQFN surface-mount package, identified in public motherboard documentation as approximately 11mm × 11mm. Replacement requires suitable rework equipment, controlled heating, accurate alignment, and correct exposed-pad soldering.
Because this component is a platform-specific embedded controller, operation depends on firmware, pin-multiplexing configuration, and power-sequencing code matched to the motherboard. A physically compatible blank device may not function unless the correct EC firmware has been programmed or supplied through the platform’s designated firmware-storage architecture.
Key Specifications
- Manufacturer: Microchip Technology
- Manufacturer Part Number: MEC1515H-D0-I/NB
- Product Family: MEC15xx
- Device Type: Keyboard and Embedded Controller
- Target Application: Notebook and Embedded Computing Platforms
- Processor Core: 32-Bit Arm Cortex-M4
- On-Chip RAM: 224KB
- Host Interface: eSPI
- Keyboard Control: KSI/KSO Matrix Scanning
- Keyboard Matrix: Up to Approximately 18×8
- Serial Interfaces: I²C/SMBus and UART
- Legacy Peripheral Interface: PS/2
- Thermal Interfaces: PECI and SB-TSI
- Analog Functions: Multi-Channel ADC and Comparators
- Fan Control: PWM Outputs and Tachometer Inputs
- System-Control Functions: Reset, Power-Good, Shutdown, and Wake Signals
- Debug Resources: JTAG/SWD-Related Debug Support
- Power Management: Notebook Power Sequencing and Low-Power-State Control
- Package: DQFN-132
- Terminal Count: 132
- Approximate Package Size: 11mm × 11mm
- Mounting Type: Surface Mount
- Temperature Ordering Code: I, Industrial Grade
- Silicon Revision: D0
- Firmware Requirement: Platform- and Motherboard-Specific
- Public Datasheet Access: Controlled Through a Microchip Account
The processor core and RAM capacity are confirmed by Microchip’s official device-support pack. Interface and package details are based on public motherboard documentation using the exact orderable device.
Typical Applications
Suitable for notebook computers, industrial PCs, embedded computing platforms, portable workstations, and other computer systems requiring keyboard scanning, power sequencing, battery-state management, fan control, thermal supervision, LED control, and low-speed peripheral communication.
The device is particularly relevant to original motherboard production, legacy-board maintenance, and component-level repair. The complete ordering suffix, silicon revision, package, EC firmware, and platform power-sequencing requirements should be verified before replacement.
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