Specifications; Digital Input/Output - Measurement Computing USB-DIO96H User Manual

Specifications

This specification applies to revision 2 hardware and later
This specification covers revision 2 of the USB-DIO96H hardware, which uses a 5 V power supply. Revision 1
of the USB-DIO96H hardware was designed with a 9 V power supply and daisy chained hub. For revision 1
hardware specifications, refer to www.mccdaq.com/PDFs/specs/USB-DIO96H_R1-spec.pdf.
All specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Digital input/output

Parameter
Output
Input
Configuration
Pull-up/down
Number of I/O
Output high
Output low
Input high
Input low
Input impedance
Source current
Sink current
Power up state
Debounce mode
Note 1: The board revision may be determined from the part number label on the housing that states "193770X-01L",
where X is the board revision.
Table 1. Digital I/O specifications
Specification
74ABT244A
74ACT373
74LCX245 for revision G or later (see Note 1)
Eight banks of 8, eight banks of 4, programmable by bank as input or output
High-impedance pull-up/down selectable with DIP switch for each digital input port.
96
2.0 V min @ –24 mA
0.5 V max @ 64 mA
2.0 V min, 5.5 V max
0.8 V max, –0.5 V absolute min
47 kΩ (series resistance)
Maximum = 24 mA per output
Maximum = 64 mA per output
Input mode
Debouncing option available through firmware that samples all inputs eight times over a
specified interval and latches out the input state only when eight consecutive samples
are identical (all 0s or all 1s). Available debouncing intervals are 1 ms, 2 ms, 5 ms,
10 ms, 20 ms, 50 ms, 100 ms, 200 ms, and 400 ms.
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Chapter 4