MEC1404-NU

Application Specific Microcontrollers Overview

The MEC1404-NU is a 32-bit keyboard and embedded controller designed for notebook platforms, manufactured by Microchip Technology. It integrates a MIPS32 M14K microcontroller core operating at frequencies up to 48 MHz. The device features 128 kB of combined code and data SRAM and supports LPC and I2C host interfaces. Key peripherals include eight ADC channels, two DAC channels, eight PWM outputs, and two PS/2 controllers. It operates on 3.3 V power with low standby current capabilities and includes secure boot functionality.

Application Specific Microcontrollers Feature Summary

• MIPS32 M14K Core: 32-bit processor with microMIPS compatibility and programmable clock speeds up to 48 MHz.
• Memory Architecture: Includes Boot ROM, 32 kB Data Optimized SRAM, and 96 kB Code Optimized SRAM.
• Host Interfaces: Supports Intel Low Pin Count (LPC) Specification 1.1 and I2C communication protocols.
• Peripheral Set: Features eight 10-bit ADCs, two 8-bit DACs, eight PWM outputs, and two PS/2 controllers.

Application Specific Microcontrollers Applications

• Notebook PC Embedded Controllers
• Keyboard Controller Systems
• Tablet Platform Management

Application Specific Microcontrollers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure that the system design accounts for the required VBAT and VTR power planes for proper standby operation. Cross-reference the datasheet revision to confirm pinout compatibility with existing PCB layouts.

Application Specific Microcontrollers Selection Notes

Select this component when an LPC or I2C interface is required for the host connection. The 128 kB SRAM configuration distinguishes it from higher-capacity variants in the MEC140x family. Verify that the 128-VTQFP package meets the physical constraints of the target enclosure and that the 3.3 V logic levels align with the system voltage requirements.

Application Specific Microcontrollers Part Context

The MEC1404-NU belongs to the MEC140x/1x family of advanced I/O controllers. This family shares a common architecture but varies in memory size and supported host interfaces. Unlike the MEC141x series, the MEC1404 does not support the eSPI interface, relying instead on LPC and I2C for host communication.

Application Specific Microcontrollers Replacement Considerations

Direct replacements within the same package are limited to other MEC1404 variants if available. For different memory sizes, consider the MEC1406-NU (160 kB SRAM) or MEC1408-NU (192 kB SRAM), provided the host interface requirements remain compatible with LPC and I2C.