DFI MTH556 Meteor Lake / Arrow Lake Core Ultra 3.5″ SBC

  • Product Name: DFI MTH556
  • Motherboard Form Factor: 3.5″ SBC
  • CPU: Intel Core Ultra processor (Meteor and Arrow Lake)
  • RAM: 2 × DDR5-5600 SODIMM slots supporting up to 96GB
  • Expansion: 1 × M.2 M Key, 1 × M.2 B Key, 1 × M.2 E Key
  • Other Features: Triple independent display support (HDMI, LVDS, USB-C DP Alt Mode), dual 2.5GbE LAN, 4 × COM ports, 4 × USB 3.2, 1 × USB-C

Description

The DFI MTH556 is a compact 3.5″ single board computer designed for high-performance edge and embedded applications. Powered by Intel® Core™ Ultra (Meteor Lake and Arrow Lake) processors, it delivers strong compute and AI capabilities while maintaining energy efficiency for space-constrained systems. The board supports up to 96GB of DDR5-5600 memory and enables triple independent displays via HDMI, LVDS, and USB-C DisplayPort Alt Mode, including 4K resolution output. With a versatile M.2 expansion layout (M, B, and E keys), dual 2.5GbE networking, and a rich set of I/O including multiple USB 3.2 and COM ports, the DFI MTH556 is well suited for industrial automation, digital signage, AIoT, and intelligent edge computing solutions.

Key Features

  • Intel® Core™ Ultra Processor
  • 2 DDR5-5600 SODIMM up to 96GB
  • 4K High Resolution: Supports 4K/ 2K resolution
  • Triple Independent Displays: 1 HDMI, 1 LVDS, 1 USB-C DP Alt. mode
  • Multiple Expansion: 1 M.2 M Key, 1 M.2 B Key, 1 M.2 E Key
  • Rich I/O: 2 2.5GbE, 4 COM, 4 USB 3.2, 1 USB-C

Specification

Category Specification
System  
Processor Intel® Core™ Ultra Processors, TDP up to 28W
  Meteor Lake: Core™ Ultra 7 165H (16C, 24MB, 1.4GHz / 5.0GHz)
  Core™ Ultra 5 135H (14C, 18MB, 1.7GHz / 4.6GHz)
  Core™ Ultra 7 155U (12C, 12MB, 1.7GHz / 4.8GHz)
  Core™ Ultra 5 125U (12C, 12MB, 1.3GHz / 4.3GHz)
  Arrow Lake: Core™ Ultra 7 255U (12C, 12MB, 2.0GHz / 5.2GHz)
  Core™ Ultra 5 225U (12C, 12MB, 1.5GHz / 4.8GHz)
Memory 2 × 262-pin DDR5-5600 SO-DIMM, up to 96GB
BIOS AMI SPI 256Mbit
Graphics  
Controller 165H / 135H: Intel® Arc™ Graphics
  255U / 225U / 155U / 125U: Intel® Graphics
Features OpenGL 4.6, DirectX 12.1, OpenCL 3.0
  HW Decode: HEVC, VP9, AV1, AVC
  HW Encode: HEVC, VP9, AV1, AVC
Display  
Interfaces 1 × HDMI 1.4b, 1 × LVDS, 1 × USB-C DP Alt. Mode
Resolution HDMI: up to 4096×2160 @ 24Hz
  LVDS: dual-channel 24-bit, up to 1920×1200 @ 60Hz
  DP: up to 4096×2304 @ 60Hz
Multi-Display Triple display: HDMI + LVDS + USB-C DP Alt. Mode
Expansion  
M.2 1 × M.2 M-Key 2280 (PCIe Gen4 x4)
  1 × M.2 B-Key 3052 (USB 3.0/2.0, PCIe Gen4 x1, SATA) + SIM slot (4G/5G)
  1 × M.2 E-Key 2230 (USB 2.0 / PCIe Gen4 x1)
Ethernet  
Controller 2 × Intel® I226V / I226LM (10/100/1000/2500Mbps)
Front I/O 2 × 2.5GbE RJ-45
Front I/O  
USB 3 × USB 3.2 Gen2 Type-A
  1 × USB 3.2 Gen2 x2 Type-C
Display 1 × HDMI, 1 × USB-C DP Alt. Mode
Internal I/O  
Serial 2 × RS-232/422/485
  2 × RS-232 (1.0mm pitch)
USB 2 × USB 2.0 (1.0mm pitch)
Audio Line-out / Mic-in
DIO 8-bit DIO (4 in / 4 out)
Fan 1 × Smart Fan (3-pin, 12V)
Watchdog Timer System reset, programmable 1–255 seconds
Security TPM 2.0
Power  
Input 9–36V DC
Connector ATX 4-pin right-angle
  ATX 4-pin vertical (optional)
Consumption Typical: 165H (28W) – 11.16W
  Max: 165H – 85.32W
  Typical: 265U (15W) – 10.44W
  Max: 265U – 78.84W
RTC Battery CR2032 coin cell (cable type)
OS Support Windows 11 & 10 IoT Enterprise 64-bit, Linux
Environment  
Operating Temp -5 to 65°C or -20 to 70°C (15W CPU only)
Storage Temp -40 to 85°C
Humidity 5–90% RH (operating & storage)
MTBF 379,660 hrs @ 25°C
  171,659 hrs @ 45°C
  78,131 hrs @ 60°C
  44,593 hrs @ 70°C
  Telcordia Issue 4, GB / GC
Mechanism  
Form Factor 3.5″ SBC
Dimensions 146 × 102 mm (5.75″ × 4.02″)
PCB Height 1.6mm
Certifications CE, FCC Class B, RoHS, UKCA
Packing List MTH556 board, Cooler (A71-108309-000G)
Country of Origin Taiwan

Ordering Information

Model Name Part Number Description
MTH556-BCN-165H 770-MTH5561-000G Intel® Core™ Ultra 7 165H, 16 cores, 28W, HDMI + LVDS + USB-C DP, 2 × 2.5GbE (RJ-45), 4 COM, 4 USB 3.2, 9–36 VDC, Operating Temp.: -5~65°C
MTH556-BCN-135H 770-MTH5561-100G Intel® Core™ Ultra 5 135H, 14 cores, 28W, HDMI + LVDS + USB-C DP, 2 × 2.5GbE (RJ-45), 4 COM, 4 USB 3.2, 9–36 VDC, Operating Temp.: -5~65°C
MTH556-ECN-155U 770-MTH5561-200G Intel® Core™ Ultra 7 155U, 12 cores, 15W, HDMI + LVDS + USB-C DP, 2 × 2.5GbE (RJ-45), 4 COM, 4 USB 3.2, 9–36 VDC, Operating Temp.: -20~70°C
MTH556-ECN-125U 770-MTH5561-300G Intel® Core™ Ultra 5 125U, 12 cores, 15W, HDMI + LVDS + USB-C DP, 2 × 2.5GbE (RJ-45), 4 COM, 4 USB 3.2, 9–36 VDC, Operating Temp.: -20~70°C
MTH556-ECN-255U 770-MTH5561-400G Intel® Core™ Ultra 7 255U, 12 cores, 15W, HDMI + LVDS + USB-C DP, 2 × 2.5GbE (RJ-45), 4 COM, 4 USB 3.2, 9–36 VDC, Operating Temp.: -20~70°C

DFI 3.5″ SBCs

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