Microchip Technology MEC1705Q-C2-I/SZ

Overview

MEC1705Q-C2-I/SZ from Microchip Technology is an ARM Cortex-M4F-based embedded controller designed for notebook and tablet platform system management. It integrates secure boot, hardware cryptographic engines (AES-128/192/256, SHA-1–512, RSA/ECC), 148 GPIOs, 11 PWM outputs, and dual-host interface support (LPC/eSPI). It operates with 1.8V/3.3V I/O, VBAT-backed RTC and 128-byte SRAM, and targets ACPI-compliant power control in thin-client and mobile computing systems.

For engineers reviewing the MEC1705Q-C2-I/SZ datasheet, MEC1705Q-C2-I/SZ pinout, MEC1705Q-C2-I/SZ application, or MEC1705Q-C2-I/SZ equivalent, key selection criteria include LPC/eSPI host interface compatibility, VBAT-powered real-time clock and wake-up timer accuracy, cryptographic engine support (AES/SHA/RSA), SRAM configuration (224KB + 32KB blocks), and 148-GPIO programmability with 1.8V operation.

Technical Context

The MEC1705Q-C2-I/SZ implements a tightly coupled ARM Cortex-M4F core with hardware FPU, NVIC supporting 240 interrupt sources, and full ARM-standard debug infrastructure including SWJ-DP, DWT, FPB, ITM, ETM, and TPIU. Its memory subsystem includes 64KB boot ROM, configurable SRAM blocks totaling 256KB/320KB/480KB, 2KB EEPROM, and 128-byte VBAT-SRAM.

It supports dual-host communication via Intel eSPI (Peripheral/VW/OOB/Flash channels) and legacy LPC (19–33 MHz), alongside five ACPI-ECI instances, eight 8042-style host interfaces, and BC-Link for companion device expansion. Power management includes VTR/VBAT standby planes, hibernation timers (0.5ms–128 min), and week/RTC timers with sub-second resolution.

Key Specifications

Pinout & Package

MEC1705Q-C2-I/SZ is housed in a 144-pin Wafer-Level Fine-Pitch Ball Grid Array (WFBGA) package with SZ suffix, measuring 6 mm × 6 mm, 0.4 mm pitch, and RoHS compliance. Pin functions are defined per Microchip DS00002206H, Section 2.0 (Pin Configuration).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar embedded controller applications.

Compared with MEC1705Q-C2-I/SZ, MEC1703Q-C2-I/SZ offers identical package and eSPI/LPC compatibility but reduced I/O and no battery-backed GPIOs; IT8528E provides basic EC functionality in QFP form but lacks ARM performance, cryptographic hardware, and VBAT-optimized low-power features.

Availability

MEC1705Q-C2-I/SZ is available at Aetrix Electronics and suitable for notebook platform design, embedded security subsystems, and thermal management modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MEC1705Q-C2-I/SZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and security ICs, with broad industrial, automotive, and computing market reach.

The MEC170x family is Microchip's high-integration embedded controller product line targeting ACPI-compliant notebook and tablet platforms, combining ARM Cortex-M4F processing, hardware security, and mixed-signal I/O for system-level power and peripheral management.

FAQ

What host interface protocols does the MEC1705Q-C2-I/SZ support?

The MEC1705Q-C2-I/SZ supports both Intel eSPI (compliant with eSPI specification) and legacy LPC (19–33 MHz) host interfaces. It also provides I2C host capability and BC-Link for companion device expansion. The choice between eSPI and LPC is configured at boot time via SPI flash settings or eSPI Flash Channel initialization, and both interfaces support ACPI SCI, SMI#, and serial IRQ signaling.

Does the MEC1705Q-C2-I/SZ include hardware cryptographic acceleration?

Yes, the MEC1705Q-C2-I/SZ integrates three dedicated hardware engines: a multi-mode AES engine (128/192/256-bit keys), a SHA hash engine (SHA-1 through SHA-512), and a public-key engine supporting RSA-1024/2048 and ECC up to 640-bit. These engines share DMA access to SRAM and operate independently of the ARM Cortex-M4F core, enabling concurrent encryption, hashing, and signing without CPU overhead.

What is the memory configuration of the MEC1705Q-C2-I/SZ?

The MEC1705Q-C2-I/SZ contains 64KB boot ROM, two SRAM blocks totaling 256KB/320KB/480KB (configurable as 224KB+32KB, 288KB+64KB, or 416KB+32KB), 128 bytes of VBAT-backed SRAM, and 2KB of EEPROM with 1,000,000 write-cycle endurance. The SRAM blocks are independently assignable for code or data use, and the EEPROM supports single-byte read/write with 32-byte page size.

How does the MEC1705Q-C2-I/SZ manage low-power states and wake-up events?

The MEC1705Q-C2-I/SZ uses dual standby power planes (VBAT and VTR) to maintain critical functions during S3/S4/S5. It features a VBAT-powered RTC, week timer (1s–8.5 yr), and two hibernation timers (0.5ms–128 min). Five wake-up inputs support optional latching, and breathing LED/PWM, RC_ID, and PS/2 edge-detection all operate in heavy sleep using the 32.768 kHz standby clock.

Is the MEC1705Q-C2-I/SZ pin-compatible with other MEC170x variants in the same package?

Yes, the MEC1705Q-C2-I/SZ shares the same 144-pin WFBGA-SZ package footprint and pinout with MEC1701Q-C2-I/SZ and MEC1703Q-C2-I/SZ. All three support identical LPC/eSPI host interfaces, GPIO mapping, and power domain assignments. Differences lie in internal feature enablement (e.g., EEPROM presence, BGPO count, UART pinout), not physical connectivity or electrical pin behavior.