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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

Microchip Technology MEC1703Q-B2-TN

Name: MEC1703Q-B2-TN
Brand: Microchip Technology
SKU: MEC1703Q-B2-TN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MEC1703Q-B2-TN

Manufacturer:: Microchip Technology

Category:: Application Specific Microcontrollers

Package:: 169-WFBGA

Datasheet:: MEC1703Q-B2-TN.pdf

Description:: EMBEDDED CONTROLLER 480 KB TOTAL

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Product details

Overview

MEC1703Q-B2-TN from Microchip Technology is an ARM Cortex-M4F-based embedded controller designed for notebook and tablet platform power management, keyboard scanning, and system control. It integrates 256KB–480KB SRAM, 2KB EEPROM, 16-channel 10-bit ADC, 11 PWM outputs, and hardware cryptographic engines (AES-128/192/256, SHA-1/256/384/512, RSA/ECC). It operates with LPC or eSPI host interface and supports VBAT-backed RTC, hibernation timers, and ACPI-compliant power states.

For engineers reviewing the MEC1703Q-B2-TN datasheet, MEC1703Q-B2-TN pinout, MEC1703Q-B2-TN application, or MEC1703Q-B2-TN equivalent, key selection considerations include its dual-host-interface flexibility (LPC/eSPI), battery-backed real-time clock and wake-up resources, integrated cryptographic acceleration, fan control with tachometer feedback, and 148 GPIOs with 1.8V/3.3V I/O support.

Technical Context

The MEC1703Q-B2-TN implements a full ARMv7-M architecture with hardware FPU, NVIC supporting 240 interrupt sources, and debug infrastructure including SWJ-DP, DWT, FPB, ITM, ETM, and TPIU. Its memory subsystem includes boot ROM, configurable SRAM blocks (224KB/288KB/416KB + 32KB/64KB), and 128-byte VBAT-SRAM.

It delivers mixed-signal system control via five PS/2 controllers, four SMBus 2.0 host controllers, two UARTs (one 8-pin, one 4-pin), 18×8 keyboard scan matrix, RC_ID detection, and dedicated peripherals including PECI 3.0, BC-Link, and AES/SHA/RSA cryptographic engines-all operating across VTR/VBAT suspend planes and VCC runtime supply.

Key Specifications

Parameter	Value and Actual Design Meaning
Core	ARM Cortex-M4F with hardware FPU, 32-bit Von Neumann address space, bit-banding, and NVIC supporting 240 vectored interrupts
Memory	64KB boot ROM; SRAM up to 480KB (224KB/288KB/416KB + 32KB/64KB); 2KB EEPROM; 128-byte VBAT-SRAM
Host Interface	LPC (19–33 MHz, 1.8V/3.3V) and Intel eSPI compliant (peripheral, virtual wire, OOB, flash channels)
Crypto Engine	Hardware AES (128/192/256), SHA-1/256/384/512, RSA (1024/2048-bit), ECC (up to 640-bit), TRNG, and monotonic counter
Timers & RTC	Four 16-bit counter/timers; two 32.768 kHz hibernation timers; 32-bit RTOS timer; VBAT-powered RTC with calendar, alarms, leap year support
I/O & Peripherals	148 GPIOs (1.8V/3.3V configurable); 11 PWM outputs; 3 tachometer inputs; 16-channel 10-bit ADC (1 µs conversion); 5 PS/2 ports; 4 SMBus controllers
Power Management	ACPI-compliant; VTR/VBAT standby power planes; low-standby current; SMI#/SCI interfaces; fast GATEA20/CPU_RESET

Pinout & Package

MEC1703Q-B2-TN is housed in a 169-pin WFBGA package (RoHS compliant) with 0.5 mm pitch, measuring 10 mm × 10 mm. Pin assignment follows Microchip's MEC170x family layout per DS00002206H, with dedicated banks for LPC/eSPI signals, GPIOs, power domains (VCC/VTR/VBAT), clock inputs (32.768 kHz crystal), and peripheral interfaces (PS/2, SMBus, UART, PWM, TACH).

Pin/Terminal	Circuit Role	Design Meaning
VCC	Main power supply input	Runtime power plane (typically 3.3V); powers core logic, analog, PLL, and most I/O
VTR	Standby power supply input	VBAT-derived standby rail enabling sleep-mode operation of RTC, timers, GPIOs, and wake sources
VBAT	Battery backup supply input	Direct connection to coin cell; powers RTC, 128-byte SRAM, week timer, and VCI registers during main power loss
LCLK/LFRAME/LRESET#	LPC bus interface signals	Enable LPC host communication at 19–33 MHz; support Serial IRQ, ACPI SCI, and SMI# generation
eSPI_CLK/eSPI_CS#/eSPI_IO[3:0]	eSPI physical layer interface	Compliant with Intel eSPI spec; supports peripheral, virtual wire, OOB, and flash channel protocols
GPIO[0:147]	General-purpose I/O bank	Configurable as input/output/pull-up/pull-down; 1.8V/3.3V tolerant; glitch-filtered; drive strength/slew rate programmable

Key Features

Feature	Design Value
Secure Boot Architecture	Hardware root of trust with immutable boot ROM; authenticates AES-256 encrypted SPI flash images before execution
Integrated Fan Control	11 PWM outputs + 3 tachometer inputs; RPM-based speed control with 3% accuracy (500–16k RPM); spin-up, ramp rate, and aging detection
Low-Power Wake Resources	Five VBAT-powered wake inputs; hibernation timers with 0.5 ms–128 min range; RTC alarm with sub-second precision
Multi-Protocol Host Interface	Simultaneous LPC and eSPI support enables flexible platform integration without hardware redesign
Hardware Cryptographic Acceleration	Dedicated AES/SHA/RSA/ECC engines with DMA access to SRAM; eliminates CPU overhead for secure boot, firmware updates, and TPM operations
Keyboard & System Control Integration	18×8 scan matrix with push-pull drive; 4 breathing/blink PWMs; 32 scratch registers; 8042 emulation; ACPI-ECI with five instances

Applications

Smart Notebook Power Management	Convertible Tablet System Control
Use Scenario: Managing S0–S5 power states, thermal throttling, battery charge/discharge coordination, and lid-open/closed detection in ultrabooks. IC Role / Device Role / Timing Role: Primary embedded controller executing ACPI-compliant power sequencing, real-time sensor polling (ADC, thermistors), and host communication via LPC/eSPI. Use Value: Enables instant-on responsiveness, connected standby compliance, and precise VBAT-backed RTC wake timing for scheduled tasks.	Use Scenario: Coordinating hinge-angle sensing, mode switching (laptop/tablet), stylus proximity, and display rotation in 2-in-1 devices. IC Role / Device Role / Timing Role: Central system controller interfacing with PS/2 keyboard/mouse, GPIO-based sensors, and host via eSPI; manages wake events from accelerometers and lid switches. Use Value: Delivers deterministic low-latency response to orientation changes using hibernation timers and VBAT-powered wake inputs.
Enterprise Laptop Security Subsystem	Fan & Thermal Management Module
Use Scenario: Providing hardware-enforced secure boot, firmware integrity verification, and cryptographic services for TPM 2.0 and BIOS-level attestation. IC Role / Device Role / Timing Role: Root-of-trust anchor with immutable boot ROM, AES-256 decryption, SHA-512 hashing, and RSA signature verification for firmware images. Use Value: Eliminates software-only attack vectors by offloading crypto operations to hardened hardware engines with DMA-secured SRAM access.	Use Scenario: Regulating cooling fans based on thermal sensor readings (ADC), maintaining acoustic limits, and detecting fan failure in high-performance laptops. IC Role / Device Role / Timing Role: Dedicated thermal manager with 11 PWM outputs, 3 tachometer inputs, and RPM-based closed-loop control algorithms running autonomously. Use Value: Achieves ±3% fan speed accuracy from 500–16k RPM while reducing host CPU load through hardware-accelerated feedback and spin-up routines.

Smart Notebook Power Management

Convertible Tablet System Control

Use Scenario: Managing S0–S5 power states, thermal throttling, battery charge/discharge coordination, and lid-open/closed detection in ultrabooks.

IC Role / Device Role / Timing Role: Primary embedded controller executing ACPI-compliant power sequencing, real-time sensor polling (ADC, thermistors), and host communication via LPC/eSPI.

Use Value: Enables instant-on responsiveness, connected standby compliance, and precise VBAT-backed RTC wake timing for scheduled tasks.

Use Scenario: Coordinating hinge-angle sensing, mode switching (laptop/tablet), stylus proximity, and display rotation in 2-in-1 devices.

IC Role / Device Role / Timing Role: Central system controller interfacing with PS/2 keyboard/mouse, GPIO-based sensors, and host via eSPI; manages wake events from accelerometers and lid switches.

Use Value: Delivers deterministic low-latency response to orientation changes using hibernation timers and VBAT-powered wake inputs.

Enterprise Laptop Security Subsystem

Fan & Thermal Management Module

Use Scenario: Providing hardware-enforced secure boot, firmware integrity verification, and cryptographic services for TPM 2.0 and BIOS-level attestation.

IC Role / Device Role / Timing Role: Root-of-trust anchor with immutable boot ROM, AES-256 decryption, SHA-512 hashing, and RSA signature verification for firmware images.

Use Value: Eliminates software-only attack vectors by offloading crypto operations to hardened hardware engines with DMA-secured SRAM access.

Use Scenario: Regulating cooling fans based on thermal sensor readings (ADC), maintaining acoustic limits, and detecting fan failure in high-performance laptops.

IC Role / Device Role / Timing Role: Dedicated thermal manager with 11 PWM outputs, 3 tachometer inputs, and RPM-based closed-loop control algorithms running autonomously.

Use Value: Achieves ±3% fan speed accuracy from 500–16k RPM while reducing host CPU load through hardware-accelerated feedback and spin-up routines.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MEC1703Q-B2-SZ	144-pin WFBGA package; 123 GPIOs; identical feature set except reduced GPIO count and no BGPO/VCI expansion	Suitable for space-constrained designs where 148 GPIOs and 6 battery-powered outputs are not required	Select when board layout prioritizes smaller footprint over maximum I/O count and VBAT-powered output flexibility
MEC1703Q-B2-XY	169-pin WFBGA package; same pin count as MEC1703Q-B2-TN but different internal routing; includes UPD dead-battery support not present in TN variant	Required for platforms needing undervoltage protection with automatic battery disconnect during deep discharge	Choose only if UPD functionality is mandatory; otherwise, TN offers identical core features at standard cost and availability

Compared with MEC1703Q-B2-SZ and MEC1703Q-B2-XY, the MEC1703Q-B2-TN provides the highest GPIO count (148) and full VBAT-powered general-purpose output capability (6 BGPOs) within the 169-pin WFBGA family-making it optimal for complex notebook EC implementations requiring extensive sensor, LED, and peripheral interfacing without sacrificing cryptographic or thermal management performance.

Availability

MEC1703Q-B2-TN is available at Aetrix Electronics and suitable for notebook platform development, convertible tablet system integration, and enterprise laptop security subsystem design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MEC1703Q-B2-TN 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 leading provider of microcontroller, analog, FPGA, and security solutions, serving automotive, industrial, communications, and computing markets with differentiated silicon and development tools.

The MEC170x product line was engineered specifically for intelligent power management and system control in mobile computing platforms, combining ARM Cortex-M4F processing, hardware cryptography, and rich I/O to replace legacy 8051-based ECs in notebooks and tablets.

FAQ

What host interface protocols does the MEC1703Q-B2-TN support?

The MEC1703Q-B2-TN supports both Intel Low Pin Count (LPC) and enhanced Serial Peripheral Interface (eSPI) host protocols. It operates LPC at 19–33 MHz with 1.8V/3.3V I/O compatibility and fully complies with the Intel eSPI specification across all four channels: peripheral, virtual wire, out-of-band, and flash. This dual-interface capability allows seamless integration into legacy and next-generation platform designs without hardware modification.

Does the MEC1703Q-B2-TN include hardware cryptographic acceleration?

Yes, the MEC1703Q-B2-TN integrates dedicated hardware cryptographic engines: AES (128/192/256-bit modes), SHA-1/256/384/512 hash functions, RSA (1024/2048-bit), and ECC (up to 640-bit). These engines interface directly with SRAM via DMA and support secure boot, firmware authentication, and TPM 2.0 operations-reducing CPU overhead and improving key generation and encryption throughput compared to software-only implementations.

How much SRAM and EEPROM does the MEC1703Q-B2-TN provide?

The MEC1703Q-B2-TN provides up to 480KB of on-chip SRAM, split into two configurable blocks: one ranging from 224KB to 416KB (typically used for code), and another from 32KB to 64KB (typically used for data). It also includes 2KB of non-volatile EEPROM with single-byte read/write access, 32-byte page size, and 1,000,000 write-cycle endurance-enabling persistent storage of calibration data, configuration parameters, and firmware update metadata.

What power domains and low-power capabilities does the MEC1703Q-B2-TN support?

The MEC1703Q-B2-TN operates across three distinct power domains: VCC (runtime), VTR (standby), and VBAT (battery backup). It supports ACPI-compliant sleep states with ultra-low standby current, VBAT-powered RTC, hibernation timers (0.5 ms–128 min range), week timer, and five latched wake inputs. All critical timing and memory resources-including 128-byte SRAM and RTC registers-remain active during VCC loss, enabling reliable resume-from-suspend and scheduled wake functionality.

Can the MEC1703Q-B2-TN manage fan speed and monitor thermal sensors?

Yes, the MEC1703Q-B2-TN includes comprehensive thermal management features: eleven 16-bit PWM outputs, three tachometer inputs, and two RPM-based fan speed controllers. Each controller pairs one tach input with one PWM output and delivers 3% speed accuracy from 500–16k RPM. It supports automatic spin-up, ramp rate control, aging detection, and invalid drive monitoring-enabling autonomous, closed-loop fan regulation without host CPU intervention.

MEC1703Q-B2-TN Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 169-WFBGA

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Applications:: Keyboard and Embedded Controller

Core Processor:: ARM® Cortex®-M4

Program Memory Type:: -

Controller Series:: MEC170x

RAM Size:: 480K x 8

Interface:: ACPI, EBI/EMI, eSPI, I2C, LPC, PECI, PS/2, QSPI, SPI

Number of I/O:: 148

Voltage - Supply:: 1.71V ~ 1.89V, 3.135V ~ 3.465V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 169-WFBGA (11x11)

MEC1703Q-B2-TN FAQ

1.How can I place an order for MEC1703Q-B2-TN through Aetrix?

Please submit a Request for Quotation (RFQ) for MEC1703Q-B2-TN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MEC1703Q-B2-TN reliable?

The price and inventory of MEC1703Q-B2-TN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEC1703Q-B2-TN is usually 5 days.

3.What payment methods are accepted for MEC1703Q-B2-TN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEC1703Q-B2-TN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MEC1703Q-B2-TN?

MEC1703Q-B2-TN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MEC1703Q-B2-TN order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MEC1703Q-B2-TN?

For technical support, including MEC1703Q-B2-TN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEC1703Q-B2-TN requirements.

6.How does Aetrix verify that MEC1703Q-B2-TN is sourced from the original manufacturer or authorized distributors?

All MEC1703Q-B2-TN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MEC1703Q-B2-TN meets industry standards.

7.What is the process for return or replacement of MEC1703Q-B2-TN?

All MEC1703Q-B2-TN units undergo pre-shipment inspection (PSI). If there is an issue with MEC1703Q-B2-TN, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MEC1703Q-B2-TN part is unused and in its original packaging.

Return procedure for MEC1703Q-B2-TN:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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