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Microchip Technology MEC1428-NU-C1
- Part No.:
- MEC1428-NU-C1
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 128-TQFP Exposed Pad
- Datasheet:
-
MEC1428-NU-C1.pdf
- Description:
- SRAM
- Quantity:
- Payment:
- Shipping:
Inventory:179
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Product details
Overview
MEC1428-NU-C1 from Microchip Technology is a low-power, pin-compatible embedded controller featuring an MIPS32 M14K core, 192 KB SRAM, eSPI/LPC/PECI/PS2/I²C interfaces, and support for 1.8V/3.3V I/O - designed for seamless migration from LPC to eSPI in notebook and industrial computing platforms.
For engineers reviewing the MEC1428-NU-C1 datasheet, MEC1428-NU-C1 pinout, MEC1428-NU-C1 application, or MEC1428-NU-C1 equivalent, key selection criteria include eSPI channel compliance, dual-voltage I/O capability, 7-keyboard matrix scan support, 108 GPIOs, and industrial temperature range (–40°C to +85°C) qualification.
Technical Context
The MEC1428-NU-C1 implements a dedicated eSPI host interface compliant with eSPI v1.1, supporting peripheral, virtual wire, OEM, and flash channels. It integrates PECI 3.0 for CPU thermal telemetry and dual PS/2 controllers for keyboard/mouse legacy support.
Its architecture includes eight PWM outputs, four TACH inputs, two DACs, eight ADC channels, and three SPI interfaces - one configurable for 1.8V-only operation and two for 3.3V - enabling flexible peripheral interfacing in space-constrained computing designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| eSPI Compliance | eSPI v1.1, supporting all four channel types (peripheral, virtual wire, OEM, flash) |
| Core & Memory | MIPS32 M14K core with 192 KB on-chip SRAM for real-time firmware execution |
| I/O Voltage Support | Configurable 1.8V and 3.3V I/O banks - enables direct interfacing with mixed-voltage peripherals |
| Keyboard Scan | 7×8 keyboard matrix scan controller - supports extended keyboard layouts without external logic |
| GPIO Count | 108 general-purpose I/Os - provides scalable signal routing for system management and board-level control |
| Temperature Range | –40°C to +85°C industrial grade - qualified for use in ruggedized notebooks and industrial controllers |
| Package Options | 128-pin WFBGA (7 mm × 7 mm, 0.4 mm pitch) - optimized for high-density mobile PCB layouts |
Pinout & Package
MEC1428-NU-C1 is housed in a 128-pin WFBGA package (7 mm × 7 mm, 0.4 mm pitch) with exposed thermal pad. Pin functions are defined per Microchip's DS00002518A, including dedicated eSPI bus signals (eSPI_CS#, eSPI_CLK, eSPI_ALERT#, eSPI_RST#), PECI, PS/2, SMBus/I²C, and GPIO groups.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| eSPI_CS# | eSPI Chip Select | Active-low enable for eSPI peripheral channel communication with host |
| eSPI_CLK | eSPI Clock Input | 20 MHz–66 MHz clock input synchronized to host eSPI timing domain |
| eSPI_ALERT# | eSPI Alert Signal | Open-drain interrupt output indicating pending virtual wire or OEM messages |
| PECI_DATA | PECI Data I/O | Bidirectional single-wire interface for Intel CPU thermal and power telemetry |
| KBD_CLK / KBD_DATA | PS/2 Keyboard Interface | Dedicated open-drain lines for legacy keyboard protocol support |
| SMBCLK / SMBDAT | SMBus 2.0 Interface | Two-wire interface for battery, charger, and sensor communication at up to 400 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot ROM | CRC-32 integrity check and AES-128 encrypted boot image validation prevents unauthorized firmware execution |
| Flash Interface Flexibility | Supports master and slave SPI Flash configurations - enables shared or dedicated firmware storage architectures |
| Dual-Voltage I/O Banks | Independent 1.8V and 3.3V I/O voltage domains - eliminates level-shifter components in mixed-signal designs |
| Industrial Temp Qualification | Full functionality across –40°C to +85°C - validated for thermal cycling and long-term reliability in fanless systems |
| Debug & Programming | ICSP™ and JTAG interfaces with TFDP trace FIFO - enables non-intrusive real-time firmware debugging and profiling |
Applications
| Notebook System Management | Industrial Controller BMC |
|---|---|
Use Scenario: Real-time thermal monitoring, power sequencing, and keyboard/mouse interface in ultra-thin notebooks. IC Role / Device Role / Timing Role: Embedded controller managing eSPI-based host communication, PECI CPU telemetry, and PS/2 keyboard scanning. Use Value: Enables Intel platform-compliant system management with zero external level shifters due to native 1.8V/3.3V I/O support. | Use Scenario: Standalone baseboard management in fanless industrial controllers requiring remote diagnostics and firmware updates. IC Role / Device Role / Timing Role: BMC-equivalent controller handling SMBus sensor reads, GPIO-based watchdog reset, and secure firmware update via eSPI flash channel. Use Value: Eliminates need for discrete security ICs through integrated AES-128 boot encryption and CRC-32 validation. |
| Embedded SBC Power Control | Tablet Platform Companion EC |
Use Scenario: Power button debouncing, battery charge status reporting, and fan speed regulation in compact single-board computers. IC Role / Device Role / Timing Role: Central power management unit using 8 PWM outputs for fan control and 4 TACH inputs for RPM feedback. Use Value: Reduces BOM count by integrating 108 GPIOs, dual DACs for analog sensor biasing, and 8-channel ADC for voltage/current sensing. | Use Scenario: Low-latency keyboard scan and LED breathing control in tablet reference designs with tight power budgets. IC Role / Device Role / Timing Role: Companion EC providing 7×8 keyboard matrix scan, breathing PWM generation, and VBAT-powered logic retention. Use Value: Achieves sub-10 µA sleep current with VBAT-powered GPIO retention - extends battery life in always-on tablet modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar embedded controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MEC1418-NU-C1 | Lacks 1.8V I/O support; only 3.3V I/O; 106 GPIOs vs. 108; 6 SMBus ports vs. 7 | Targeted at cost-sensitive LPC-to-eSPI transition designs without mixed-voltage peripheral requirements | Select when 1.8V I/O and extra GPIO/SMBus are not required - lower gate count reduces layout complexity |
| MEC1408-NU-C1 | LPC-only host interface; no eSPI; 106 GPIOs; no PECI; 0 DACs; 0 TACH inputs | Suitable for legacy platforms retaining LPC infrastructure and lacking CPU thermal telemetry needs | Choose only for brownfield LPC designs where eSPI migration is deferred - not interoperable with eSPI hosts |
Compared with MEC1418-NU-C1 and MEC1408-NU-C1, the MEC1428-NU-C1 uniquely delivers 1.8V/3.3V I/O flexibility, four TACH inputs for multi-fan systems, and seven SMBus ports - making it the only option among the three qualified for next-generation fanless industrial controllers requiring mixed-voltage sensor integration and full eSPI compliance.
Availability
MEC1428-NU-C1 is available at Aetrix Electronics and suitable for notebook platform design, industrial controller development, and embedded SBC power management requiring stable component supply and long-term lifecycle assurance.
Supply support for MEC1428-NU-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 global semiconductor company specializing in microcontrollers, analog devices, FPGAs, and security ICs - with leadership in embedded control and connectivity solutions.
The MEC14XX family was engineered specifically for Intel and AMD platform-compliant embedded controller roles in mobile and industrial computing - prioritizing eSPI readiness, secure boot, and thermal/power telemetry integration.
FAQ
What host interfaces does the MEC1428-NU-C1 support?
The MEC1428-NU-C1 supports eSPI v1.1 (with peripheral, virtual wire, OEM, and flash channels), LPC, PECI 3.0, PS/2, and I²C interfaces. It is fully validated on both Intel and AMD eSPI platforms. This multi-interface capability allows the MEC1428-NU-C1 to serve as a drop-in replacement during LPC-to-eSPI transitions while maintaining legacy compatibility where needed.
Does the MEC1428-NU-C1 support secure boot, and how is it implemented?
Yes, the MEC1428-NU-C1 includes a Secure Boot ROM that performs CRC-32 integrity checking and AES-128 decryption of the boot image before execution. This ensures only authenticated firmware runs on the device. The MEC1428-NU-C1 uses hardware-accelerated cryptographic engines to enforce this protection without software overhead - critical for tamper-resistant system management in the MEC1428-NU-C1.
What is the maximum number of SMBus ports supported by the MEC1428-NU-C1?
The MEC1428-NU-C1 supports seven SMBus 2.0 ports, configured as six controllers and five physical ports (6/5 notation per Microchip DS00002518A). This enables concurrent communication with multiple battery fuel gauges, thermal sensors, and power delivery ICs. The MEC1428-NU-C1's expanded SMBus count directly supports complex multi-rail power systems found in high-end notebooks and industrial controllers.
Is the MEC1428-NU-C1 pin-compatible with other MEC14XX devices?
Yes, the MEC1428-NU-C1 is pin-compatible with MEC1418-NU-C1 and MEC1408-NU-C1 within the same package variant (e.g., 128-WFBGA). This allows hardware reuse across platform generations. However, MEC1428-NU-C1-specific features like 1.8V I/O and additional SMBus ports require corresponding PCB routing - the MEC1428-NU-C1 maintains mechanical and electrical pin mapping but enables enhanced functionality on identical footprints.
What development tools are officially supported for the MEC1428-NU-C1?
Microchip officially supports the MEC1428-NU-C1 with MPLAB XC32 Compiler, MPLAB REAL ICE In-Circuit Emulator, MPLAB ICD 3 Debugger, and PICkit 3 Programmer/Debugger. Demo boards EVB-MEC1428MECC are available for hardware evaluation. These tools provide full debug visibility into the MEC1428-NU-C1's MIPS32 core, eSPI transaction tracing, and secure boot flow validation.
MEC1428-NU-C1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 128-TQFP Exposed Pad
- 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:
- 128-TQFP (14x14)
MEC1428-NU-C1 FAQ
1.How can I place an order for MEC1428-NU-C1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MEC1428-NU-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-NU-C1 reliable?
The price and inventory of MEC1428-NU-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-NU-C1 is usually 5 days.
3.What payment methods are accepted for MEC1428-NU-C1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEC1428-NU-C1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEC1428-NU-C1?
MEC1428-NU-C1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEC1428-NU-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-NU-C1?
For technical support, including MEC1428-NU-C1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEC1428-NU-C1 requirements.
6.How does Aetrix verify that MEC1428-NU-C1 is sourced from the original manufacturer or authorized distributors?
All MEC1428-NU-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-NU-C1 meets industry standards.
7.What is the process for return or replacement of MEC1428-NU-C1?
All MEC1428-NU-C1 units undergo pre-shipment inspection (PSI). If there is an issue with MEC1428-NU-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-NU-C1 part is unused and in its original packaging.
Return procedure for MEC1428-NU-C1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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