● Logic High: 2.0 to 5.0 VDC

● Logic Low: -0.5 to +0.8 VDC

● Input Load (Hi): 20 µa

● Input Load (Lo): -200 µa

● Logic High: 2.5 VDC min., source 32 ma

● Logic Low: 0.5 VDC max., sink 64 ma

● Type: Three type 82C54-10 programmable interval counters

● Output Drive:

- 2.0 VDC min., source 32 mA

- 0.55 VDC max,. sink 64 mA

● Input Gate: TTL/CMOS compatible

● Clock: On-board, 1 MHz crystal-controlled clock

● Active Count Edge: Negative Edge

● Minimum Clock Pulse Width: 30 nS high, 40 nS low

● Timer Range: 16 bits

● Operating Temperature Range: 0° to 60°C

● Storage Temperature Range: -50° to +120°C

● Humidity: 0 to 90% RH, non-condensing.

● Power Requirements：+5 VDC @ 210 mA

● +5 VDC from the computer bus on pin 49 of each digital I/O header with an on-board 0.5A Resettable Fuse

● This product is designed to be in full compliance with CE requirements.