74F191SC

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Counter/Divider
• Characteristics: High-speed, synchronous, up/down counter
• Package: Small Outline Integrated Circuit (SOIC)
• Essence: Sequential logic device for counting and dividing signals
• Packaging/Quantity: Typically sold in reels or tubes containing multiple units

Specifications

• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 50 MHz
• Number of Bits: 4
• Counting Modes: Up, Down, Up/Down
• Reset Function: Asynchronous reset
• Output Type: Synchronous parallel

Detailed Pin Configuration

The 74F191SC IC has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. CP (Clock Pulse): Input pin for clock signal.
2. MR (Master Reset): Asynchronous reset input.
3. P0-P3 (Parallel Data Inputs): Four parallel data input pins.
4. PE (Parallel Enable): Enables the parallel data inputs.
5. U/D (Up/Down): Determines the counting direction.
6. CE (Count Enable): Enables the counter operation.
7. TC (Terminal Count): Output pin indicating terminal count.
8. Q0-Q3 (Outputs): Four output pins representing the binary count.

Functional Features

• High-speed operation allows for efficient counting and dividing of signals.
• Synchronous design ensures accurate and reliable counting.
• Up, down, and up/down counting modes provide flexibility in applications.
• Asynchronous reset allows for immediate counter initialization.
• Terminal count output facilitates external control based on count completion.

Advantages and Disadvantages

Advantages: - High-speed operation enables rapid counting and dividing. - Synchronous design ensures reliable and accurate results. - Flexible counting modes cater to various application requirements.

Disadvantages: - Limited number of bits (4) may restrict the range of counts achievable. - Requires an external clock signal for operation.

Working Principles

The 74F191SC is a synchronous up/down counter that operates based on the input clock signal. The counting direction (up, down, or up/down) is determined by the U/D pin. The counter increments or decrements its value based on the clock pulses received. The count can be reset asynchronously using the MR pin. The parallel data inputs (P0-P3) allow presetting the initial count value. The counter's output pins (Q0-Q3) represent the binary count.

Detailed Application Field Plans

The 74F191SC IC finds applications in various fields where counting and dividing signals are required. Some specific application areas include: - Digital frequency dividers - Event counters - Timekeeping circuits - Industrial automation systems - Communication equipment

Detailed and Complete Alternative Models

• 74LS191: Low-power Schottky version of the 74F191SC with similar functionality.
• CD40193: CMOS-based up/down counter with four-bit capability.
• SN54/74LS192: Synchronous up/down counter with a larger bit count (e.g., 8 bits).

(Note: This list is not exhaustive and other alternative models may exist.)

In conclusion, the 74F191SC is a high-speed, synchronous up/down counter IC used in various applications. Its compact package, flexible counting modes, and reliable performance make it a popular choice among designers.