The 7400AS is an 8 digit LCD bi-directional totalising counter for PCB mounting. It features a pushbutton reset on the front of the panel and operates from an external 3VDC supply. It is supplied with an electrical reset and features inputs for count, direction and external reset.
2.6 – 3.4VDC
Less than 10µA, typically 5µA
8 digit, 8mm height, high contrast LCD characters with leading zero blanking
10kHz maximum, positive edge triggered, 0.7V threshold, 100µS minimum pulse length, TTL/CMOS Compatible
Contact closure/open collector input, 30Hz maximum, negative edge triggered, 0.7V threshold, 25mS minimum pulse length
Contact closure/open collector, negative edge triggered, 0.7V threshold, 15mS minimum pulse length
Electronic input TTL/CMOS Compatible. Add=logic 1, Subtract=logic 0(0V)
-10°C to +60°C
-20°C to +70°C
7400AS – Electronic Totaliser
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