Memory; Power Requirements; Power Output; Usb Specifications - Measurement Computing USB-234 User Manual

USB-234 User's Guide

Memory

Parameter
Data FIFO
Non-volatile memory

Power requirements

Parameter
From USB
Idle USB current
Maximum load USB current
Note 2: A typical bus-powered hub provides 100 mA on its USB lines. The USB-234 does not work on a bus-
powered hub.
Note 3: The maximum power draw from all output terminals should be kept under 0.9 W to avoid overloading
the USB port

Power output

Parameter
Output voltage
Maximum current
Overcurrent protection
Short circuit current
Overvoltage protection

USB specifications

Parameter
Device type
Device compatibility
Connector type
USB cable type
USB cable length
Table 8 Memory specifications
Specification
2,047 samples (4096 bytes)
Up to 256 kB microcontroller integrated Flash

2 kB microcontroller integrated EEPROM)

Table 9. Power specifications
Specification
4.50 to 5.25 VDC (Note 2)
165 mA
<500 mA (Note 3)
Table 10. External voltage specifications
Specification
5 V, ±3%
150 mA
200 mA
50 mA
±20 V
Table 11. USB specifications
Specification
USB 2.0 full speed (12 Mb/s)
USB 1.1, USB 2.0
USB micro-B receptacle
A-micro-B cable, UL type AWM 2725 or equivalent (28 AWG × 2C + 28 AWG × 2C +
AB)
3 m (9.84 ft) max
25
Specifications