Measurement Computing USB-DIO96H - Manual (Page 15)

15
Chapter 4
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
Table 1. Digital I/O specifications
Parameter Specification
Output 74ABT244A
Input 74ACT373
Configuration Eight banks of 8, eight banks of 4, programmable by bank as input or output
Pull-up/pull-down High-impedance pull-up/pull-down selectable via DIP switch for each digital input port.
Number of I/O 96
Output high 2.0 V min @ –24 mA
Output low 0.5 V max @ 64 mA
Input high 2.0 V min, 5.5 V max
Input low 0.8 V max, –0.5 V absolute min
Input impedance 47 kΩ (series resistance)
Source current Maximum = 24 mA per output
Sink current Maximum = 64 mA per output
Power up state Input mode
Debounce 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.
Debounce interval accuracy +0% / –12.5%