Manual USB-DIO24-CTR6
17
Chapter 7: Specifications
Digital I/O
Channels / Groups: 24 in two 8-bit and two 4-bit groups
Type
8255 Mode 0 compatible
Logic Level
Vccio
Pull-up/down
10k
Ω, jumper selectable
Vccio
Voltage levels
Jumper selectable for 5V or 3.3V
Logic Levels
5V (CMOS)
3.3V (LVTTL)
Low Inputs
≤ 1.5V
≤ 2uA ≤ 0.8V
≤ 2uA
High Inputs
≥ 3.5V
≤ 2uA ≥ 2.0V
≤ 2uA
Low Outputs
≤ 0.55V 32mA ≤ 0.55V
24mA
High Outputs
≥ 3.8V
32mA
≥ 2.4V
24mA
Table 7-1:
Vccio Logic Levels
Counter / Timers
Number / Type
Two 82C54 programmable interval counters
Counter size
16-bit
Logic level
Vccio
On-board clock
10MHz
Clock Pulse Width
High - 30ns (min)
Low - 40ns (min)
Bus Type
USB2.0 high-speed (480 Mb/s), USB3.0 and USB1.1 compatible
Power
Basic unit
140 mA typical (no load)
+5 VDC from the USB bus or external power supply depending on user configuration. The
USB bus is specified to provide 500 mA in most desktop environments. This gives you 360
mA available (500mA -140mA = 360mA). If using more than a total of 500mA, use optional 5
VDC external power supply and remove VUSB jumper and place jumper on VEXT. Then
plug in external power before plugging into USB port. This option will give you a total of
1000mA available.
Vccio resettable fuse at 0.5A located near the connector.
Environmental
Operating Temp.:
0 °C. to 70 °C. (-40°C to +85°C as a factory option)
Storage Temp.:
-40 °C. to +85 °C.
Humidity:
5 to 90% RH, non-condensing.
Board Dimension:
3.550 x 3.775 inches.
Box Dimension:
4.00 x 4.00" x 1.25 inches.
