MEC1406-NU

Application Specific Microcontrollers Overview

The MEC1406-NU is a keyboard and embedded controller IC from Microchip Technology, designed for notebook PC platforms. It features a MIPS32 M14K microcontroller core with 160 kB of code-optimized SRAM and 32 kB of data-optimized SRAM. The device supports LPC and I2C host interfaces, operating at 3.3 V with a supply range of 1.71 V to 3.465 V. It includes an internal DMA controller, multiple peripheral interfaces such as PS/2, SMBus, SPI, and UART, and is housed in a 128-VTQFP package.

Application Specific Microcontrollers Feature Summary

• MIPS32 M14K Core: High-performance 32-bit processor with microMIPS compatibility and programmable clock frequencies up to 48 MHz.
• Integrated Memory: Includes 160 kB Code SRAM, 32 kB Data SRAM, and 64 Bytes battery-powered SRAM.
• Host Interfaces: Supports LPC Specification 1.1 and I2C communication protocols for system connectivity.
• Peripheral Control: Features up to two PS/2 controllers, six SMBus ports, eight PWM outputs, and an 8-channel ADC.

Application Specific Microcontrollers Applications

• Notebook PC Embedded Controllers
• Keyboard Controllers
• Tablet Platform I/O Controllers

Application Specific Microcontrollers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Ensure that the required host interface configuration (LPC or I2C) aligns with the system design requirements before procurement.

Application Specific Microcontrollers Selection Notes

Select the MEC1406-NU when 160 kB of code SRAM is required alongside LPC or I2C host interfaces. Compare against the MEC1404-NU for lower memory needs or the MEC1416-NU if eSPI support is necessary instead of LPC/I2C.

Application Specific Microcontrollers Part Context

This component belongs to the MEC140x/1x family of advanced I/O controllers. It shares the same physical package and many peripheral features with variants like the MEC1404-NU and MEC1408-NU, differing primarily in the amount of onboard SRAM available for firmware execution.

Application Specific Microcontrollers Replacement Considerations

Direct pin-compatible replacements within the same family include the MEC1404-NU (128 kB SRAM) and MEC1408-NU (192 kB SRAM). Verify firmware compatibility and memory size requirements when substituting these parts.