Evaluates: SPI and SMBus/I²C-Compatible Parts

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The Maxim Command Module (CMAXQUSB) receives commands from an IBM PC through the USB to create an SPI™ or SMBus™/I²C-compatible interface. Maxim evaluation kits (EV kits) that make use of the CMAXQUSB require custom software and can be ordered together as an evaluation system (EV system). Ordering information for EV systems is included in the EV kit's corresponding data sheet.

An EV system is an EV kit combined with an interface board such as a CMAXQUSB and custom software. Refer to the appropriate EV kit data sheet for quick start and detailed operating instructions.

The use of the CMAXQUSB as a MAXQ2000 development target is not supported. Rather, use the MAXQ2000 EV kit (available at for this purpose.

The CMAXQUSB has been tested on Windows® 98 Second Edition, Windows 2000, and Windows XP®.

Key Features

  • PC-Controlled I/O Platform
  • USB Powered
  • Provides 2.5V, 3.3V, or 5V to EV Kit
  • SPI Bus: 8MHz Burst
  • I²C/2-Wire Bus: Fast 400kHz/Standard 100kHz
  • Optional 1.5kΩ I²C Bus Pullup Resistors
Request Reliability Report for: CMAXQUSB 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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