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The 7400AS is an 8 digit LCD bi-directional totalising counter for PCB mounting. It features a push-button 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.
The 7400AS is an 8 digit LCD bi-directional totalising counter for PCB mounting. It features a push-button 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.
Features
Applications
| Supply Voltage | 2.6 - 3.4VDC |
| Current Consumption | Less than 10µA, typically 5µA |
| Display | 8 digit, 8mm height, high contrast LCD characters with leading zero blanking |
| Electronic Count Input (1) | 10kHz maximum, positive edge triggered, 0.7V threshold, 100uS minimum pulse length, TTL/CMOS Compatible |
| Low Speed Count Input (2) | Contact closure/open collector input, 30Hz maximum, negative edge triggered, 0.7V threshold, 25mS minimum pulse length |
| Reset Input (R) | Contact closure/open collector, negative edge triggered, 0.7V threshold, 15mS minimum pulse length |
| Direction Input (D) | Electronic input TTL/CMOS Compatible. Add=logic 1, Subtract=logic 0(0V) |
| Operating Temp. | -10°C to +60°C |
| Storage Temp. | -20°C to +70°C |
| Supply Voltage | 2.6 - 3.4VDC |
| Current Consumption | Less than 10µA, typically 5µA |
| Display | 8 digit, 8mm height, high contrast LCD characters with leading zero blanking |
| Electronic Count Input (1) | 10kHz maximum, positive edge triggered, 0.7V threshold, 100uS minimum pulse length, TTL/CMOS Compatible |
| Low Speed Count Input (2) | Contact closure/open collector input, 30Hz maximum, negative edge triggered, 0.7V threshold, 25mS minimum pulse length |
| Reset Input (R) | Contact closure/open collector, negative edge triggered, 0.7V threshold, 15mS minimum pulse length |
| Direction Input (D) | Electronic input TTL/CMOS Compatible. Add=logic 1, Subtract=logic 0(0V) |
| Operating Temp. | -10°C to +60°C |
| Storage Temp. | -20°C to +70°C |
