74190 Up/Down Decade Counter
24,20 EGP
Description
Features:
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Counts 8-4-2-1 BCD or Binary
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Single Down/Up Count Control Line
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Count Enable Control Input
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Ripple Clock Output for Cascading
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Asynchronously Presettable with Load Control
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Parallel Outputs
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Cascadable for n-Bit Applications
74LS190 Pinout Diagram
74LS190 Pin Description
| Pin No | Pin Name | Description |
| 1 | P1 | Parallel Data Input |
| 2 | Q1 | Flip-Flop Output |
| 3 | Q0 | Flip-Flop Output |
| 4 | CE’ | Count Enable (Active LOW) Input |
| 5 | U/D | Up/Down Count Control Input |
| 6 | Q2 | Flip-Flop Output |
| 7 | Q3 | Flip-Flop Output |
| 8 | GND | Ground |
| 9 | P3 | Parallel Data Input |
| 10 | P2 | Parallel Data Input |
| 11 | PL’ | Parallel Load Control (Active LOW) Input |
| 12 | TC | Terminal Count Output |
| 13 | RC’ | Ripple Clock Output |
| 14 | CP | Clock Pulse (Active HIGH going edge) Input |
| 15 | P0 | Parallel Data Input |
| 16 | VCC | Positive Supply |
Specifications
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Family: LS
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Logic circuit type: Synchronous up/down BCD counter
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Counter type: BCD 8-4-2-1
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Output type: Parallel
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Minimum supply voltage: 4.75 V
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Maximum supply voltage: 5.25 V
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Minimum operating temperature: 0°C
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Maximum operating temperature: 70°C
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Encapsulation: DIP
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16 pins
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