CY74FCT191ATSOCT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: High-speed, synchronous, up/down counter
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: A versatile counter IC used in various applications
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 100MHz
• Number of Counting Stages: 4
• Count Direction: Up or Down
• Synchronous Inputs: Clock (CLK), Up/Down (UD), and Reset (RST)
• Asynchronous Inputs: Load (LD) and Enable (EN)
• Output: 4-bit binary count

Detailed Pin Configuration

1. CLK (Clock Input)
2. UD (Up/Down Control Input)
3. LD (Load Control Input)
4. EN (Enable Control Input)
5. RST (Reset Control Input)
6. QA (Output Bit 0)
7. QB (Output Bit 1)
8. QC (Output Bit 2)
9. QD (Output Bit 3)
10. GND (Ground)
11. VCC (Supply Voltage)

Functional Features

• High-speed operation allows for efficient counting in time-critical applications.
• Synchronous inputs ensure accurate and synchronized counting.
• Up/Down control enables both incrementing and decrementing of the count.
• Load control input allows for loading a preset value into the counter.
• Enable control input enables or disables the counting operation.
• Reset control input resets the counter to its initial state.

Advantages and Disadvantages

Advantages

• High-speed operation enables rapid counting in time-sensitive applications.
• Synchronous inputs ensure accurate and synchronized counting.
• Versatile functionality allows for various counting modes (up, down, load).
• Compact SOIC package offers space-saving integration on PCBs.

Disadvantages

• Limited number of counting stages (4) may not be sufficient for complex applications requiring larger counters.
• Requires an external clock source for operation.

Working Principles

The CY74FCT191ATSOCT is a synchronous up/down counter that operates based on the input clock signal. The count direction (up or down) is determined by the UD control input. When enabled, the counter increments or decrements its count value on each rising edge of the clock signal. The LD input allows loading a preset value into the counter, while the EN input enables or disables the counting operation. The RST input resets the counter to its initial state.

Detailed Application Field Plans

The CY74FCT191ATSOCT finds application in various fields where counting is required. Some potential application areas include:

1. Digital frequency dividers
2. Event counters in industrial automation systems
3. Pulse width modulation (PWM) generation
4. Timekeeping circuits
5. Traffic light controllers
6. Frequency synthesizers

Detailed and Complete Alternative Models

1. SN74LS191: 4-bit synchronous up/down counter with similar functionality.
2. CD40193B: CMOS presettable up/down counter with 4-bit output.
3. MC14516B: Binary up/down counter with asynchronous reset and parallel load capability.

Note: These alternative models offer similar functionality but may have different specifications and pin configurations.