---
model: CEM521
lifecycle: active
official_site_status: Available
category: Boards & Modules > System on Module > COM Express Type 6
source: https://www.axiomtek.com/products/boards-and-modules/system-on-module/com-express-type-6/cem521
updated: 2026-11-08
---

# CEM521

COM Express Type 6 Compact Module with 8th Gen Intel® Core™ & Celeron® Processor

- Category: Boards & Modules > System on Module > COM Express Type 6
- Status: Active

## Key features

- 8th gen Intel® Core™ i7/i5/i3 and Celeron® processors (Whiskey Lake-U)
- 2 dual-channel DDR4-2400 SO-DIMM for up to 64GB
- Max. up to 8 lanes of PCI Express
- 3 SATA Gen3
- 4 USB 3.0 and 8 USB 2.0
- Supports eMMC for up to 64G (optional)
- TPM 2.0 supported

## Specifications

- **CPU:** Intel® Core™ i7-8665UE/i5-8365UE/i3-8145UE processor (Whiskey Lake-U) & Intel® Celeron® processor 4305UE
- **Chipset:** SoC integrated
- **System Memory:** 2 x Dual-channel DDR4-2400 SO-DIMM slot, up to 64GB
- **BIOS:** AMI
- **Serial:**
  - 1 x LPC
  - 1 x SPI
  - 2 x TX/RX
- **USB:**
  - 4 x USB 3.0
  - 8 x USB 2.0
- **Ethernet:** 1 x 10/100/1000 Mbps Ethernet (Intel® i219-LM)
- **Display:**
  - 1 x LVDS (optional eDP 1.4: 4096 x 2304@60Hz)
  - 1 x VGA 1920 x 1200 @60Hz (default)
  - 1 x DDI (DisplayPort 1.2: 4096 x 2304@60Hz/HDMI 1.4: 4096 x 2160@30/24Hz)
- **GPIO:** 4-CH in & 4-CH out (SDIO optional)
- **Audio:** HD link interface to baseboard for Codec
- **Storage:** 3 x SATA Gen3
- **Expansion:** 8 x PCI Express Gen3 (max. 5 PCIe devices without LAN)
- **Others:**
  - 1 x I2C
  - TPM 2.0
- **Battery:** N/A
- **Power Input:**
  - ATX: +12V, +5VSB
  - AT: +12V
- **Watchdog Timer:** 65536 levels, 0 to 65535 sec.
- **Hardware Monitoring:** Yes
- **Operating Temperature:** -40°C to +85°C (-40°F to +185°F)
- **Vibration:** 3.5 Grms
- **Relative Humidity:** 10% - 95% relative humidity, non-condensing
- **Dimensions:** 95 x 95 mm
- **Board Thickness:** 2.0 mm
- **Certifications:** CE

## Ordering information

- CEM521-i7-8665UE (P/N E38D521100) — COM Express Type 6 Compact module with Intel® Core™ i7-8665UE, DDI, VGA, LVDS, GbE LAN, USB 3.0 and TPM
- CEM521-i5-8365UE (P/N E38D521102) — COM Express Type 6 Compact module with Intel® Core™ i5-8365UE, DDI, VGA, LVDS, GbE LAN, USB 3.0 and TPM
- CEM521-i3-8145UE (P/N E38D521104) — COM Express Type 6 Compact module with Intel® Core™ i3-8145UE, DDI, VGA, LVDS, GbE LAN, USB 3.0 and TPM
- CEM521-Cel-4305UE (P/N E38D521105) — COM Express Type 6 Compact module with Intel® Celeron® 4305UE, DDI, VGA, LVDS, GbE LAN, USB 3.0 and TPM
- CEM521-i7-8665UE (Ind.) (P/N E38D521110) — COM Express Type 6 compact module with Intel® Core™ i7-8665UE DDI VGA LVDS GbE LAN USB 3.0 and TPM (wide temperature)
- CEM521-i5-8365UE (Ind.) (P/N E38D521111) — COM Express Type 6 compact module with Intel® Core™ i5-8365UE DDI VGA LVDS GbE LAN USB 3.0 and TPM (wide temperature)
- CEM521-i3-8145UE (Ind.) (P/N E38D521112) — COM Express Type 6 compact module with Intel® Core™ i3-8145UE DDI VGA LVDS GbE LAN USB 3.0 and TPM (wide temperature)
- CEB94011 (P/N E394011100) — COM Express Type 6 evaluation board
- CEM521 heat sink with fan (P/N E39J016100)
- CEM521 heat spreader (P/N 7128D521000E)

## Sources

- Official product page: https://www.axiomtek.com/products/boards-and-modules/system-on-module/com-express-type-6/cem521
- Official datasheet (PDF): https://www.axiomtek.com/Download/Spec/cem521.pdf

## Sales contact

- TC Lee, Business Development Manager, Axiomtek
- Email: tc.lee@axiomtek.com.tw
- LinkedIn: https://www.linkedin.com/in/t-c-lee/
- WhatsApp: https://wa.me/886955040637

_Maintained by TC Lee, Business Development Manager at Axiomtek. This is not the official Axiomtek website: specifications are mirrored from https://www.axiomtek.com, which is authoritative._