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74190 PRESETTABLE BCD/DECADE UP/DOWN COUNTERS.
25,00 EGP
In stock
✅ BCD (0–9) Synchronous Up/Down Counter
✅ TTL-Compatible, DIP-16 Package
✅ Presettable with parallel load inputs
✅ Separate count-up & count-down clocks
✅ Ideal for displays, counters, clocks, and control systems
In stock
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Description
🔢 74190 – Presettable BCD/Decade Up/Down Counter (Synchronous)
📄 **Description:
The 74190** is a synchronous presettable BCD (Binary-Coded Decimal) up/down counter designed for counting in decimal (0–9). It features a parallel-load input for presetting the counter to any BCD value, along with independent count-up (CPU) and count-down (CPD) clock inputs.
This IC provides carry (CO) and borrow (BO) outputs, making it easily cascadable for multi-digit counting applications. It is TTL-compatible and operates synchronously, meaning all bits of the counter change simultaneously, ensuring glitch-free and reliable operation.
📐 Specifications:
| Parameter | Value |
|---|---|
| Counter Type | BCD (0–9) Synchronous Up/Down |
| Bit Width | 4-bit |
| Counting Range | 0000 (0) to 1001 (9) |
| Clock Inputs | CPU (Count Up), CPD (Count Down) |
| Control Inputs | LOAD (Parallel load), CLR (Clear) |
| Outputs | Q0–Q3, CO (Carry), BO (Borrow) |
| Logic Compatibility | TTL |
| Supply Voltage (V<sub>CC</sub>) | 4.75V – 5.25V |
| Max Clock Frequency | ~25 MHz |
| Propagation Delay (t<sub>pd</sub>) | ~25 ns |
| Package Types | DIP-16, SOIC-16 |
🌟 Key Features:
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🔁 BCD/Decade Counting – Counts 0 through 9 in either direction
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🔼🔽 Separate Count-Up & Count-Down Clock Inputs
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📥 Parallel Load Capability – Set any BCD value directly
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🛠️ Synchronous Operation – No glitches or race conditions
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⏱️ High-Speed TTL-Compatible Logic
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♻️ Carry & Borrow Outputs – For easy cascading to higher digits
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🧽 Asynchronous Clear (CLR) Input – Instantly resets the counter
⚙️ Applications:
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⏲️ Digital Clocks and Timers
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📟 7-Segment BCD Displays
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🧮 Decimal Counters
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🏭 Process and Event Monitoring
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🔄 Bidirectional Counters
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📉 Frequency Meters and Tachometers
Customer Reviews
Specification
Overview
| Weight Weight | 0,0000 g |
|---|
