| Technical data |
| Digital Input/Output |
| Digital type |
Input: 74ACT373
Output: 74FCT244 |
| Number of I/O: |
24 (Port A Bit 0
through Port C Bit7) |
| Configuration: |
2 banks of 8 and
2 banks of 4, or 3 banks of 8 |
| Pull up/pull-down
configuration: |
All pins pulled
up to 5V via 47 kO resistors (default). Selection available for pull down to ground. Hardware selectable via
zero O resistor. |
| Input high voltage: |
2.0 V min, 5.5 V
absolute max |
| Input low voltage: |
0.8 V max,
–0.5 V absolute min |
| Source current |
Self-powered hub
or externally powered root port hub: 15 mA per output,max. Bus-powered or battery-powered root port hubs are not
supported. |
| Sink current: |
365 mA/(number
of outputs), max. 64 mA max sink current for any single output. |
|
Counter |
| Pin name: |
CTR; Schmitt
trigger input. |
| Counter type: |
Event counter
|
| Number of channels: |
1 |
| Input type: |
TTL, rising edge
triggered |
| Input source: |
CTR screw
terminal |
| Resolution: |
32 bits |
| Schmidt trigger hysteresis:
|
20 mV to 100 mV
|
| Input leakage current: |
±1 µA |
| Maximum input frequency: |
1 MHz |
| High pulse width: |
500 ns min |
| Low pulse width: |
500 ns min |
| Input low voltage: |
0 V min, 1.0 V
max |
| Input high voltage: |
4.0 V min, 15.0
V max |
|
Power |
| Supply current |
80 mA typ, 135
mA max. (Total current requirement; no load) |
| Input power requirements |
4.75 V min, 5.25
V max. USB +5V power available |
|
General |
| USB controller clock error:
|
25 °C: ±30 ppm
max 0 °C to 70 °C: ±50 ppm max |
| Device type: |
USB 1.1
low-speed |
| Device compatibility: |
USB 1.1, USB 2.0
|
|
Environmental |
| Operating temperature range:
|
0 °C to 70 °C
|
| Storage temperature range:
|
–40 °C to 70 °C
|
| Humidity: |
0% to 90%
non-condensing |
|
Mechanical |
| Dimensions (L×W×H): |
79 × 82 × 25 mm
(3.11 × 3.23 × 0.98 in.) |
| USB cable length: |
3 m (9.8 ft)
|
| USB cable type: |
A-B cable, UL
type AWM 2725 or equivalent. Min 24 AWG VBUS/GND, min 28 AWG D+/D– |
