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Microchip Technology MEC1428-SZ-C1
- Part No.:
- MEC1428-SZ-C1
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 144-WFBGA
- Datasheet:
-
MEC1428-SZ-C1.pdf
- Description:
- SRAM
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MEC1428-SZ-C1 from Microchip Technology is a low-power, pin-compatible embedded controller featuring an eSPI/LPC dual-host interface, 192 KB SRAM, 108 GPIOs, and support for 1.8V/3.3V I/O - designed for seamless migration from legacy LPC to modern eSPI in notebook, tablet, and industrial controller platforms.
For engineers reviewing the MEC1428-SZ-C1 datasheet, MEC1428-SZ-C1 pinout, MEC1428-SZ-C1 application, or MEC1428-SZ-C1 equivalent, key selection criteria include eSPI channel compliance, dual-voltage I/O flexibility, integrated PS/2 controllers, secure boot with AES-128, and temperature-rated WFBGA/VTQFP packaging for industrial-grade reliability.
Technical Context
The MEC1428-SZ-C1 implements a MIPS32 M14K core with dedicated hardware acceleration for eSPI protocol layers (Peripheral, Virtual Wire, OEM, and Flash channels), enabling full interoperability with Intel and AMD eSPI host platforms without software abstraction overhead.
It integrates 7-keyboard matrix scan rows, 6 SMBus 2.0 ports (5 controllers + 3 I²C masters/slaves), dual PS/2 controllers, 8-channel 12-bit ADCs, 8 PWM outputs, 4 TACH inputs, and full UART support - all operating across −40°C to +85°C with VCI_IN dual-supply tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | MIPS32 M14K microcontroller - enables deterministic real-time execution and compatibility with MPLAB XC32 toolchain. |
| Host Interface | eSPI v1.2 + LPC - supports direct replacement of LPC-based EC designs while enabling bandwidth-efficient, single-wire eSPI communication with CPU southbridge. |
| SRAM | 192 KB on-chip SRAM - sufficient for firmware, stack, and dynamic data handling without external memory dependency. |
| I/O Voltage Support | 1.8V and 3.3V tolerant - allows mixed-voltage system integration without level-shifting components. |
| GPIO Count | 108 configurable GPIOs - provides scalable peripheral connectivity for keyboard scan, LED control, fan monitoring, and custom I/O expansion. |
| Secure Boot | CRC-32 + AES-128 ROM - ensures authenticated firmware loading and protection against unauthorized code injection at power-on. |
| Operating Temperature | −40°C to +85°C - qualified for extended-temperature industrial and automotive-adjacent computing applications. |
| ADC/PWM/TACH | 8×12-bit ADCs, 8×PWM, 4×TACH - enables precise thermal management, fan speed control, and analog sensor interfacing in compact form factors. |
Pinout & Package
MEC1428-SZ-C1 is available in 128-pin WFBGA (7 mm × 7 mm, 0.5 mm pitch) and 128-pin VTQFP (14 mm × 14 mm, 0.4 mm pitch) packages. Pin functions are defined per Microchip's DS00002518A, with dedicated eSPI bus pins (eSPI_CS#, eSPI_CLK, eSPI_IO[3:0]), VCI_IN[1:0] for dual-supply configuration, and KeyScan row/column terminals mapped to GPIO banks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| eSPI_CS# | eSPI Chip Select | Active-low enable for eSPI transaction initiation; synchronous with eSPI_CLK and eSPI_IO signals. |
| VCI_IN[0:1] | Core I/O Supply Inputs | Accepts independent 1.8V and 3.3V supplies to configure I/O voltage domains without external regulators. |
| KEYSCAN_R[0:6] | Keyboard Matrix Row Drivers | 7 dedicated open-drain outputs supporting up to 18×8 keyboard scan matrix with programmable slew rate. |
| TACH[0:3] | Fan Speed Input | 4 edge-triggered inputs for RPM measurement via tachometer pulses from DC brushless fans. |
| UART_TX/RX | Asynchronous Serial Interface | Full-duplex debug and host communication at up to 3 Mbps; supports bootloader and runtime diagnostics. |
| nRESET_IN | System Reset Input | Asynchronous active-low reset signal synchronized internally to avoid metastability in multi-clock domain systems. |
Key Features
| Feature | Design Value |
|---|---|
| eSPI Channel Compliance | Fully implements Peripheral, Virtual Wire, OEM, and Flash channels per eSPI v1.2 - eliminates need for host-side translation layers. |
| Dual-Voltage I/O Flexibility | Independent 1.8V/3.3V I/O banks allow coexistence with low-voltage sensors and legacy 3.3V peripherals without level shifters. |
| Integrated Keyboard Scan Controller | 7-row × 8-column matrix support with auto-scan, debounce, and interrupt-on-change - reduces host CPU polling load. |
| Secure Boot Enforcement | AES-128 decryption and CRC-32 validation executed in ROM before any user code executes - prevents tampering with boot firmware. |
| Industrial Temperature Range | Qualified from −40°C to +85°C in both WFBGA and VTQFP packages - supports deployment in uncontrolled thermal environments. |
| Debug & Programming Interface | ICSP™ and JTAG support via dedicated 2-pin debug port - enables non-intrusive firmware update and real-time trace without占用 GPIOs. |
Applications
| Notebook Platform Management | Industrial Tablet Control Unit |
|---|---|
Use Scenario: Real-time thermal regulation, battery charging state monitoring, and keyboard/mouse interface in ultra-thin notebooks with Intel Core processors. IC Role / Device Role / Timing Role: Embedded controller managing eSPI host communication, PS/2 keyboard/mouse protocol translation, and fan PWM timing synchronization. Use Value: Enables LPC-to-eSPI migration without redesigning motherboard layout, leveraging MEC1428-SZ-C1's pin-compatibility and dual-voltage I/O for mixed-sensor interfaces. | Use Scenario: Ruggedized tablet used in warehouse logistics requiring reliable button input, LED status feedback, and ambient temperature sensing. IC Role / Device Role / Timing Role: Central control unit handling GPIO-driven keypad scanning, 8-channel ADC-based environmental monitoring, and UART-based barcode scanner handshaking. Use Value: Delivers −40°C to +85°C operation and 108 GPIOs for direct peripheral integration, reducing BOM count versus discrete logic solutions. |
| Embedded SBC Power Sequencing | Smart Charging Controller for Portable Devices |
Use Scenario: Single-board computer in factory automation executing BIOS-level power sequencing, voltage rail monitoring, and watchdog supervision. IC Role / Device Role / Timing Role: System-level power manager coordinating PWROK, RSMRST#, SYSPWR_PRES, and VCC_PWRGD signals with precise timing alignment to CPU reset states. Use Value: Integrates dedicated power-good detection inputs and programmable delay timers - eliminating external supervisor ICs and simplifying PCB routing. | Use Scenario: Portable medical device requiring safe lithium-ion battery charge control, LED breathing effects, and USB enumeration coordination. IC Role / Device Role / Timing Role: Charging subsystem coordinator managing DAC-controlled LED dimming, 2×DAC output for analog charging voltage reference, and USB suspend/resume signaling via eSPI Virtual Wire. Use Value: Combines 2 DACs, 8 PWMs, and eSPI VW channel support to replace discrete LED drivers and USB interface logic - shrinking footprint by >35%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar embedded controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MEC1418-SZ-C1 | Same core, SRAM, and eSPI/LPC interface; differs in 6 SMBus ports (vs. 7), no 1.8V I/O support, and only 106 GPIOs. | Targeted at cost-optimized LPC-first designs where dual-voltage I/O and extra SMBus port are unnecessary. | Select MEC1418-SZ-C1 when migrating from LPC-only platforms and 1.8V peripheral integration is not required. |
| ITE IT5570E | LPC-only interface, no eSPI support; 128 KB SRAM; 96 GPIOs; lacks AES-128 secure boot and dual-voltage I/O. | Suitable for legacy industrial systems where eSPI adoption is not mandated and security requirements are minimal. | Choose IT5570E only for brownfield LPC designs with strict cost constraints and no roadmap toward eSPI. |
Compared with MEC1418-SZ-C1, the MEC1428-SZ-C1 adds 1.8V I/O capability and one additional SMBus port - critical for next-gen sensor-rich notebooks; versus IT5570E, it delivers eSPI readiness, enhanced security, and broader voltage flexibility essential for future-proof platform design.
Availability
MEC1428-SZ-C1 is available at Aetrix Electronics and suitable for notebook platform management, industrial tablet control units, embedded SBC power sequencing, and smart charging controller applications requiring stable component supply across extended temperature ranges.
Supply support for MEC1428-SZ-C1 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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and secure authentication solutions for industrial, automotive, and computing markets.
The MEC14XX family was developed specifically to accelerate the industry-wide transition from LPC to eSPI in embedded controllers - delivering pin-compatible, secure, and thermally robust alternatives for modern x86 platform designs.
FAQ
What host interface protocols does the MEC1428-SZ-C1 support?
The MEC1428-SZ-C1 supports eSPI v1.2 (with full Peripheral, Virtual Wire, OEM, and Flash channel implementation), legacy LPC, and I²C interfaces. It is validated for interoperability with both Intel and AMD eSPI host platforms, and its dual-mode interface allows backward compatibility with existing LPC designs during migration.
Does the MEC1428-SZ-C1 include hardware-based secure boot functionality?
Yes, the MEC1428-SZ-C1 features a ROM-based secure boot engine that performs CRC-32 integrity checking and AES-128 decryption of the initial firmware image before execution. This ensures firmware authenticity and prevents unauthorized code injection at power-on - a requirement for platforms targeting Trusted Computing Group (TCG) compliance.
What package options are available for the MEC1428-SZ-C1?
The MEC1428-SZ-C1 is offered in three package variants: 128-pin WFBGA (7 mm × 7 mm, 0.5 mm pitch), 128-pin VTQFP (14 mm × 14 mm, 0.4 mm pitch), and 144-pin WFBGA. All variants are rated for −40°C to +85°C operation and maintain identical pinouts for drop-in compatibility across form factors.
How many SMBus ports does the MEC1428-SZ-C1 provide, and what is their configuration?
The MEC1428-SZ-C1 integrates 7 SMBus 2.0 ports: 6 configured as SMBus controllers and 5 as I²C masters/slaves. This configuration supports concurrent communication with multiple battery fuel gauges, thermal sensors, and PMICs - exceeding the 6-port capability of the MEC1418-SZ-C1 and enabling denser peripheral integration.
Is the MEC1428-SZ-C1 pin-compatible with other members of the MEC14XX family?
Yes, the MEC1428-SZ-C1 is fully pin-compatible with the MEC1418-SZ-C1 and MEC1408-SZ-C1 within the same package type (e.g., 128-VTQFP or 128-WFBGA). This enables direct substitution in existing layouts during LPC-to-eSPI migration, provided firmware and voltage configuration are updated to match MEC1428-SZ-C1's dual-voltage I/O and enhanced peripheral set.
MEC1428-SZ-C1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 144-WFBGA
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Keyboard and Embedded Controller
- Core Processor:
- MIPS32® M14K™
- Program Memory Type:
- External Program Memory
- Controller Series:
- -
- RAM Size:
- 192K x 8
- Interface:
- I2C, LPC, SMBus, SPI, UART
- Number of I/O:
- 108
- Voltage - Supply:
- 1.71V ~ 3.465V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 144-WFBGA (9x9)
MEC1428-SZ-C1 FAQ
1.How can I place an order for MEC1428-SZ-C1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MEC1428-SZ-C1 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 MEC1428-SZ-C1 reliable?
The price and inventory of MEC1428-SZ-C1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEC1428-SZ-C1 is usually 5 days.
3.What payment methods are accepted for MEC1428-SZ-C1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEC1428-SZ-C1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEC1428-SZ-C1?
MEC1428-SZ-C1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEC1428-SZ-C1 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 MEC1428-SZ-C1?
For technical support, including MEC1428-SZ-C1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEC1428-SZ-C1 requirements.
6.How does Aetrix verify that MEC1428-SZ-C1 is sourced from the original manufacturer or authorized distributors?
All MEC1428-SZ-C1 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 MEC1428-SZ-C1 meets industry standards.
7.What is the process for return or replacement of MEC1428-SZ-C1?
All MEC1428-SZ-C1 units undergo pre-shipment inspection (PSI). If there is an issue with MEC1428-SZ-C1, 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 MEC1428-SZ-C1 part is unused and in its original packaging.
Return procedure for MEC1428-SZ-C1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MEC1428-SZ-C1 Tags
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