Measurement-computing USB-DIO96H User Manual download pdf (Page 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

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%

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 23 24

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