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OM-USB-TEMP User's Guide Specifications
Microcontroller
Type
USB +5V voltage
Table 12. Microcontroller specifications
Two high-performance 8-bit RISC microcontrollers
Parameter
USB +5V (VBUS) input voltage range
Table 13. USB +5V voltage specifications
Conditions Specification
4.75 V min. to 5.25 V max.
Power
Table 14. Power specifications
Parameter Conditions Specification
Supply current
Supply current
(Note 16)
User +5V output voltage range
(terminal block pin 21 and pin 47)
User +5V output current
(terminal block pin 21 and pin 47)
Isolation
USB enumeration
Continuous mode
Connected to self-powered hub. (Note 17)
Bus-powered and connected to a self-powered hub. (Note 17)
Measurement system to PC
<100 mA
140 mA typ.
4.75 V min. to
5.25 V max.
10 mA max.
500 VDC min.
Note 16:
Note 17:
This is the total current requirement for the OM-USB-TEMP which includes up to 10 mA for the status LED.
Self-Powered Hub refers to a USB hub with an external power supply. Self-powered hubs allow a connected USB device to draw up to 500 mA.
Root Port Hubs reside in the PC’s USB Host Controller. The USB port(s) on your PC are root port hubs. All externally powered root port hubs (desktop PC’s) provide up to 500 mA of current for a USB device. Battery-powered root port hubs provide 100 mA or 500 mA, depending upon the manufacturer. A laptop PC that is not connected to an external power adapter is an example of a battery-powered root port hub.
USB specifications
USB device type
Device compatibility
USB cable type
USB cable length
Table 15. USB specifications
USB 2.0 (full-speed)
USB 1.1, USB 2.0
Self-powered, 100 mA consumption max
A-B cable, UL type AWM 2527 or equivalent. (min 24 AWG VBUS/GND, min 28 AWG D+/D–)
3 meters max.
25
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