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● 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: 2.0 VDC min., source 32 mA.

● Logic Low: 0.55 VDC max., sink 64 mA.

● Type: 82C54-5 programmable interval counters

● Output Drive: 2.2 mA at 0.45 VDC (5 LSTTL loads

● 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, 50 nS low

● Timer Range: 48 bits

● Operating Temperature Range: 0° to 60°C

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

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

● +5 VDC from the computer bus. Resettable fuse at 0.5A.

● Basic Unit: +5 VDC at 170 ma., if no current is drawn from the auxiliary fused +5 VDC output.

● With One Counter: +5 VDC at 190 ma.

● With Two Counters: +5 VDC at 210 ma.

● With Three Counters: +5 VDC at 230 ma.

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