74HC191PW,112

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter/Divider
• Characteristics: High-speed operation, low power consumption
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: 4-bit synchronous binary up/down counter with parallel load
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Operating Temperature Range: -40°C to +125°C
• Maximum Clock Frequency: 50 MHz
• Number of Counting Bits: 4
• Counting Modes: Up, Down, or Load
• Output Type: Standard
• Logic Family: HC (High-Speed CMOS)

Pin Configuration

The 74HC191PW,112 has a total of 16 pins. The pin configuration is as follows:

1. CP (Clock Pulse) - Input
2. MR (Master Reset) - Input
3. U/D (Up/Down) - Input
4. PL (Parallel Load) - Input
5. D0 (Data Bit 0) - Input/Output
6. D1 (Data Bit 1) - Input/Output
7. D2 (Data Bit 2) - Input/Output
8. D3 (Data Bit 3) - Input/Output
9. Q0 (Output Bit 0) - Output
10. Q1 (Output Bit 1) - Output
11. Q2 (Output Bit 2) - Output
12. Q3 (Output Bit 3) - Output
13. GND (Ground) - Ground
14. VCC (Supply Voltage) - Power Supply
15. RC (Ripple Carry) - Output
16. CET (Count Enable Parallel) - Input

Functional Features

• Synchronous operation: The counter operates synchronously with the clock pulse.
• Up/Down counting: The counter can count up or down based on the U/D input.
• Parallel load: The counter can be loaded with a parallel value when PL is high.
• Ripple carry output: The RC output provides a carry signal for cascading multiple counters.

Advantages and Disadvantages

Advantages: - High-speed operation: The 74HC191PW,112 can operate at frequencies up to 50 MHz. - Low power consumption: The IC consumes low power, making it suitable for battery-powered devices.

Disadvantages: - Limited counting bits: The counter has only 4 bits, limiting the maximum count value to 15.

Working Principles

The 74HC191PW,112 is a synchronous binary up/down counter. It counts in either the up or down direction based on the U/D input. The counter increments or decrements its value on each clock pulse. When the PL input is high, the counter loads the parallel value present at the D0-D3 inputs. The RC output provides a carry signal for cascading multiple counters.

Detailed Application Field Plans

The 74HC191PW,112 is commonly used in various applications that require counting or dividing functions. Some of the application fields include:

1. Digital frequency dividers
2. Industrial automation systems
3. Electronic test equipment
4. Communication systems
5. Automotive electronics

Alternative Models

Here are some alternative models that provide similar functionality:

1. CD40193BE: 4-bit Binary Up/Down Counter
2. SN74LS191N: Synchronous 4-Bit Up/Down Binary Counters
3. MC14516B: Presettable Up/Down Counter

These alternative models can be considered based on specific requirements and availability.

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