Some Raspberry Pi Compute Module 4 are now available in the industrial/extended temperature operating from -40°C to +85°C, suitable for outdoor applications in cold climates and (some) cold storage solutions that require sub -20°C temperature.
The Raspberry Pi Compute Module 4 was launched in 2020, Raspberry Pi did not provide an operating temperature range. Since then, the Raspberry CM4 was qualified to operate in the -20°C to +85°C range, which was suitable for most applications but not all. Eben Upton has now announced the availability of Raspberry Pi Compute Module 4 variants with extended temperature range.
Raspberry Pi Compute Module 4 specifications (as of March 2025):
- SoC – Broadcom BCM2711 quad-core Cortex-A72 processor @ 1.5 GHz with VideoCore VI GPU
- System Memory – 1GB, 2GB, 4GB, or 8GB LPDDR4-3200 SDRAM
- Storage – CM4: 4, 8, 16, or 32GB eMMC flash up to 100MB/s; CM4 Lite: No storage device on module
- Networking
- Gigabit Ethernet transceiver supporting IEEE1588
- Optional Wireless module with 802.11b/g/n/ac WiFi 5 and Bluetooth 5.0; external or PCB antenna
- 2x 100-pin high-density board-to-board connectors with:
- Storage – CM4 Lite only: SDIO 2.0 for SD card on carrier board
- Video Output
- 2x HDMI 2.0 ports
- 2-lane MIPI DSI camera interface
- 4-lane MIPI DSI camera interface
- Camera I/F
- 2-lane MIPI CSI camera interface
- 4-lane MIPI CSI camera interface
- Ethernet – Gigabit Ethernet
- USB – 1x USB 2.0 host
- PCIe – 1x PCIe Gen2 x1 (5Gbps)
- 28x user GPIO (3.3v or 1.8v) also configurable as 6x UART, 6x I2C, 5x SPI, SDIO, 1x DPI (Parallel RGB Display), 1x PCM, 2x PWM, 3x GPCLK outputs
- Supply Voltage – 5V
- Dimensions – 55 x 40 x 4.7mm with 4x M2.5 mounting holes
- Temperature Range
- Standard – -20°C to +85°C
- Extended – -40°C to +85°C
The Raspberry Pi Compute Module 4 with an industrial operating temperature integrates extended-temperature-range SDRAM and eMMC parts from Samsung. Other components are unchanged because they are already qualified to operate in the -40°C to +85°C range.
Raspberry Pi also released pricing and availability information for the “ET” CM4 modules. You’d need to pay $15 to $20 extra to get an extended temperature Raspberry Pi CM4 module. The company only has four models that are “typically held in stock”: CM4004000ET (CM4 Lite with 4GB RAM), CM4101000ET (CM4 Lite with 1GB RAM,), CM4102016ET (CM4 with 2GB RAM, 16GB flash, wireless), and CM4104000ET (CM4 Lite with 4GB RAM, wireless). Other models can be manufactured upon order of at least 1,000 pieces (MOQ) with a lead time of 10 to 12 weeks.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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