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– |