74HCT191N,652

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Counter/Divider
• Characteristics: High-speed operation, low power consumption
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: Binary synchronous up/down counter
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• Operating Temperature Range: -40°C to +125°C
• Maximum Clock Frequency: 25 MHz
• Counting Modes: Up, Down, Up/Down
• Maximum Count Value: 15 (4-bit binary)

Detailed Pin Configuration

1. MR (Master Reset)
2. CP (Clock Pulse)
3. UP/DOWN (Up/Down Control)
4. PE (Parallel Enable)
5. RC (Ripple Carry Output)
6. QA (Output A)
7. QB (Output B)
8. QC (Output C)
9. QD (Output D)
10. GND (Ground)
11. QD (Output D)
12. QC (Output C)
13. QB (Output B)
14. QA (Output A)
15. VCC (Supply Voltage)
16. CE (Count Enable)

Functional Features

• Synchronous counting: The counter advances or decreases its count synchronously with the clock pulse.
• Parallel load capability: Allows loading of a preset value into the counter using the parallel enable input.
• Ripple carry output: Provides a carry signal for cascading multiple counters.
• Master reset: Resets the counter to its initial state.
• Low power consumption: Operates at a low supply voltage and consumes minimal power.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient counting in various applications. - Low power consumption makes it suitable for battery-powered devices. - Versatile counting modes provide flexibility in different scenarios.

Disadvantages: - Limited count value (4-bit binary) may not be sufficient for certain applications requiring larger counts. - DIP-16 package may not be suitable for space-constrained designs.

Working Principles

The 74HCT191N,652 is a binary synchronous up/down counter. It counts up or down based on the clock pulse and the up/down control input. The counter can be preset to a specific value using the parallel enable input. The output of each stage represents a binary digit, and the ripple carry output allows cascading multiple counters for higher count values.

Detailed Application Field Plans

1. Digital frequency division: The counter can be used to divide an input clock signal by a specific factor, enabling frequency division in digital circuits.
2. Event counting: By connecting external events to the clock input, the counter can keep track of the number of occurrences of a particular event.
3. Sequential control: The counter can be utilized in sequential control systems to generate specific sequences of outputs based on the count value.

Detailed and Complete Alternative Models

1. 74HC191: Similar to 74HCT191N,652 but operates at a wider supply voltage range (2V to 6V).
2. CD40193: A CMOS-based up/down counter with similar functionality but operates at a lower clock frequency.
3. SN74LS191: A TTL-based up/down counter with comparable specifications and pin configuration.

(Note: These alternative models are provided as examples and may have slight variations in characteristics and packaging.)

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