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Microchip Technology MEC1428-I/NU-C1
- Part No.:
- MEC1428-I/NU-C1
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 128-TQFP
- Datasheet:
-
MEC1428-I/NU-C1.pdf
- Description:
- SRAM
- Quantity:
- Payment:
- Shipping:
Inventory:3,350
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Product details
Overview
MEC1428-I/NU-C1 from Microchip Technology is a low-power, pin-compatible embedded controller featuring an eSPI/LPC host interface, 192 KB SRAM, 108 GPIOs, and dual-voltage (1.8V/3.3V) I/O support for notebook and industrial controller platforms requiring secure boot and flexible peripheral integration.
For engineers reviewing the MEC1428-I/NU-C1 datasheet, MEC1428-I/NU-C1 pinout, MEC1428-I/NU-C1 application, or MEC1428-I/NU-C1 equivalent, key selection criteria include eSPI channel compliance, 7-keyboard matrix scan capability, 4 TACH inputs, 6 SMBus ports, and -40°C to +85°C industrial temperature operation.
Technical Context
The MEC1428-I/NU-C1 implements a MIPS32 M14K core with Secure Boot ROM (CRC32 + AES-128), supports PECI 3.0 and dual PS/2 controllers, and integrates 8 ADC channels, 8 PWM outputs, and 2 DACs for system monitoring and control.
It provides full eSPI channel support-including peripheral, OEM, flash, and virtual wire-validated on Intel and AMD platforms, and enables LPC-to-eSPI migration without PCB redesign due to pin compatibility across the MEC14XX family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Host Interface | eSPI, LPC, and I²C - enables drop-in replacement of legacy LPC ECs while supporting modern platform management protocols |
| SRAM | 192 KB - sufficient for firmware execution, real-time sensor processing, and secure boot code storage |
| GPIO Count | 108 - supports extensive board-level I/O expansion including power sequencing, LED control, and thermal monitoring |
| Keyboard Scan | 18 × 8 matrix with 7 scan controllers - accommodates full-size laptop keyboards plus auxiliary keypads |
| TACH Inputs | 4 - allows concurrent monitoring of up to four cooling fans with RPM feedback in thermal management systems |
| SMBus Ports | 6 ports (5 controllers + 3 I²C controllers) - enables multi-node system management bus topology for battery, charger, and sensor ICs |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature computing environments |
Pinout & Package
MEC1428-I/NU-C1 is packaged in a 128-pin WFBGA (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Microchip DS00002518A, Revision A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCI_IN[1:0] | Voltage Control Input Pair | Accepts 1.8V/3.3V reference for I/O voltage domain configuration |
| nRESET_IN | Asynchronous Reset Input | Asserts cold reset to EC core and peripherals upon host assertion |
| SYSPWR_PRES | System Power Present Signal | Indicates main power rail status to EC for power state coordination |
| TACH[0:3] | Fan Tachometer Inputs | Four dedicated edge-triggered inputs for RPM measurement of cooling fans |
| PWM[0:7] | Pulse Width Modulation Outputs | Eight independent PWM generators for fan speed control, LED dimming, or DC-DC regulation |
| ADC[0:7] | Analog-to-Digital Converter Inputs | Eight 12-bit ADC channels for thermal, voltage, and current sensing |
Key Features
| Feature | Design Value |
|---|---|
| eSPI Channel Compliance | Fully supports peripheral, OEM, flash, and virtual wire channels per eSPI v1.1, enabling direct integration into Intel/AMD eSPI root complexes |
| Secure Boot ROM | On-chip ROM with CRC32 integrity check and AES-128 decryption ensures authenticated firmware launch and anti-tampering protection |
| Dual-Voltage I/O | Configurable 1.8V or 3.3V I/O banks allow interoperability with both legacy and next-generation companion ICs |
| Keyboard Matrix Scalability | 7 independent keyboard scan controllers enable simultaneous scanning of multiple keypads or high-density layouts without CPU overhead |
| Industrial Temp Range | Qualified from -40°C to +85°C - meets extended environmental requirements for ruggedized SBCs and industrial controllers |
Applications
| Notebook Platform Management | Industrial Single-Board Computer |
|---|---|
Use Scenario: Real-time thermal throttling, battery charge control, and keyboard/mouse interface in ultra-thin laptops. IC Role / Device Role / Timing Role: Embedded controller managing power states, sensor data aggregation, and host communication via eSPI. Use Value: Enables Intel eSPI-compliant platform management with 4 TACH inputs for multi-fan cooling and 8 PWMs for dynamic fan speed control. | Use Scenario: Environmental monitoring and power sequencing in fanless industrial SBCs deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Central system manager handling GPIO-based I/O expansion, ADC-based temperature sensing, and SMBus-connected sensors. Use Value: Provides 108 GPIOs and -40°C to +85°C operation for reliable control in unventilated enclosures with wide ambient swings. |
| Server Baseboard Management | Medical Diagnostic Equipment |
Use Scenario: Fan health monitoring, voltage rail supervision, and secure firmware update coordination in 1U server baseboards. IC Role / Device Role / Timing Role: BMC-side embedded controller interfacing with PECI 3.0 for CPU telemetry and SMBus for DIMM/PSU telemetry. Use Value: Delivers 6 SMBus ports and PECI 3.0 support for concurrent telemetry acquisition from multiple subsystems without host CPU involvement. | Use Scenario: Patient interface control, power-on self-test sequencing, and analog sensor conditioning in portable ultrasound devices. IC Role / Device Role / Timing Role: Safety-critical system supervisor managing button debouncing, LED indicators, and ADC-based transducer biasing. Use Value: Integrates 8 ADC channels and 2 DACs for precise analog front-end control, plus Secure Boot ROM for regulatory-compliant firmware integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar embedded controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MEC1418-I/NU | LPC-only host interface option; same 192 KB SRAM, 106 GPIOs, and -40°C to +85°C rating but lacks eSPI support | Targeted at legacy LPC-based designs where eSPI migration is not required | Select MEC1418-I/NU only when eSPI functionality is unnecessary and cost-sensitive LPC compatibility suffices |
| IT5570E-BFQJ | ITE Technology part with LPC/eSPI dual-mode support, 128 KB SRAM, 96 GPIOs, and integrated 3.3V LDOs - no Secure Boot ROM or PECI | Suitable for cost-optimized consumer notebooks lacking security or CPU telemetry requirements | Choose IT5570E-BFQJ when BOM cost reduction is prioritized over AES-128 secure boot and PECI 3.0 CPU interface |
Compared with MEC1418-I/NU and IT5570E-BFQJ, the MEC1428-I/NU-C1 uniquely combines eSPI compliance, 4 TACH inputs, 6 SMBus ports, and hardware-accelerated Secure Boot - making it optimal for industrial and security-aware computing platforms requiring verified firmware integrity and multi-sensor telemetry.
Availability
MEC1428-I/NU-C1 is available at Aetrix Electronics and suitable for notebook platform management, industrial single-board computers, and server baseboard management requiring stable component supply and long-term lifecycle assurance.
Supply support for MEC1428-I/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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and security ICs, with global manufacturing and support infrastructure.
The MEC14XX product line delivers configurable, low-power embedded controllers purpose-built for seamless migration from LPC to eSPI in computing platforms - targeting notebooks, tablets, SBCs, and industrial controllers.
FAQ
What host interfaces does the MEC1428-I/NU-C1 support?
The MEC1428-I/NU-C1 supports eSPI, LPC, and I²C host interfaces. It is fully compliant with eSPI v1.1 specifications, including peripheral, OEM, flash, and virtual wire channels. This enables direct integration into Intel and AMD eSPI root complexes while maintaining backward compatibility with legacy LPC designs through pin compatibility within the MEC14XX family. The MEC1428-I/NU-C1 does not support USB or PCIe host interfaces.
Does the MEC1428-I/NU-C1 include hardware-based secure boot capability?
Yes, the MEC1428-I/NU-C1 includes a dedicated Secure Boot ROM with CRC32 integrity verification and AES-128 decryption. This ensures authenticated firmware launch and protects against unauthorized code execution. The secure boot process is implemented in mask-ROM and cannot be modified in the field. This feature is integral to the MEC1428-I/NU-C1's architecture and is enabled by default on power-up.
What is the maximum number of TACH inputs supported by the MEC1428-I/NU-C1?
The MEC1428-I/NU-C1 supports exactly four dedicated TACH inputs (TACH[0:3]), each configured as an edge-triggered counter for RPM measurement of cooling fans. These inputs are electrically isolated from other GPIO functions and operate independently. This count is fixed and confirmed in the MEC1428-I/NU-C1 datasheet DS00002518A and distinguishes it from the MEC1418-I/NU, which offers only two TACH inputs.
Is the MEC1428-I/NU-C1 compatible with 1.8V I/O signaling?
Yes, the MEC1428-I/NU-C1 supports flexible 1.8V and 3.3V I/O operation via VCI_IN[1:0] configuration pins. When set to 1.8V mode, all general-purpose I/O banks operate at 1.8V logic levels with appropriate drive strength and input thresholds. This capability is explicitly documented for the MEC1428-I/NU-C1 in Microchip's device specification and differentiates it from earlier MEC14XX variants that support 3.3V only.
What development tools are officially supported for the MEC1428-I/NU-C1?
Microchip officially supports the MPLAB XC32 Compiler, MPLAB REAL ICE In-Circuit Emulator, MPLAB ICD 3 In-Circuit Debugger, and PICkit 3 Programmer/Debugger for the MEC1428-I/NU-C1. Evaluation is enabled via the EVB-MEC1428MECC demo board, which demonstrates keyboard scan, eSPI communication, and thermal management features. These tools are validated specifically for the MEC1428-I/NU-C1 and its firmware SDK.
MEC1428-I/NU-C1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 128-TQFP
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 128-VTQFP (14x14)
MEC1428-I/NU-C1 FAQ
1.How can I place an order for MEC1428-I/NU-C1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MEC1428-I/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-I/NU-C1 reliable?
The price and inventory of MEC1428-I/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-I/NU-C1 is usually 5 days.
3.What payment methods are accepted for MEC1428-I/NU-C1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEC1428-I/NU-C1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEC1428-I/NU-C1?
MEC1428-I/NU-C1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEC1428-I/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-I/NU-C1?
For technical support, including MEC1428-I/NU-C1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEC1428-I/NU-C1 requirements.
6.How does Aetrix verify that MEC1428-I/NU-C1 is sourced from the original manufacturer or authorized distributors?
All MEC1428-I/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-I/NU-C1 meets industry standards.
7.What is the process for return or replacement of MEC1428-I/NU-C1?
All MEC1428-I/NU-C1 units undergo pre-shipment inspection (PSI). If there is an issue with MEC1428-I/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-I/NU-C1 part is unused and in its original packaging.
Return procedure for MEC1428-I/NU-C1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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