CD74HC191M96

Product Overview

• Category: Integrated Circuit
• Use: Counter/Divider
• Characteristics: High-Speed, CMOS Logic, Synchronous Operation
• Package: 16-Pin SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HC191M96 is a high-speed CMOS logic counter/divider IC that operates synchronously. It is commonly used in digital circuits for counting and dividing signals.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Supply Voltage Range: 2V to 6V
• Logic Family: HC
• Number of Stages: 4-Bit Binary Counter
• Maximum Clock Frequency: 50 MHz
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 13 ns (typical)

Detailed Pin Configuration

The CD74HC191M96 has a 16-pin SOIC package with the following pin configuration:

1. Clock Enable (CE)
2. Clock Input (CP)
3. Parallel Load Input (PL)
4. Down/Up Count Control (UD)
5. Carry Output (CO)
6. Terminal Count Output (TC)
7. Data Inputs (D0-D3)
8. Ground (GND)
9. Data Outputs (Q0-Q3)
10. Ripple Clock Output (RCO)
11. Carry Input (CI)
12. VCC (Positive Power Supply)

Functional Features

• Synchronous operation allows precise control over counting and dividing signals.
• Can be configured as an up-counter or down-counter based on the UD input.
• Parallel load input enables loading of initial count values.
• Carry output provides cascading capability for larger counters.
• Terminal count output indicates when the counter reaches its maximum value.
• Ripple clock output generates a clock signal with half the frequency of the input clock.

Advantages and Disadvantages

Advantages: - High-speed operation suitable for time-critical applications. - CMOS logic provides low power consumption. - Synchronous operation ensures accurate counting/dividing.

Disadvantages: - Limited number of stages (4-bit) compared to other counter ICs. - Requires external components for more complex applications.

Working Principles

The CD74HC191M96 operates based on synchronous counting principles. The clock input (CP) triggers the counter to increment or decrement its value based on the up/down control (UD) input. The parallel load input (PL) allows loading of initial count values. The carry input (CI) and carry output (CO) enable cascading multiple counters. The terminal count output (TC) indicates when the counter reaches its maximum value.

Detailed Application Field Plans

The CD74HC191M96 is commonly used in various digital applications, including:

1. Frequency Division: Dividing an input clock signal by a specific factor.
2. Event Counting: Counting the occurrence of specific events or pulses.
3. Time Delay Generation: Generating precise time delays based on the clock frequency.
4. Address Decoding: Implementing address decoding in memory systems.
5. Control Circuitry: Building control circuits for sequential operations.

Alternative Models

Other alternative models that can be considered as replacements for the CD74HC191M96 include:

1. CD4017: Decade Counter/Divider with 10 outputs.
2. CD4020: 14-Stage Binary Counter.
3. CD4510: BCD Up/Down Counter with presettable count.
4. CD4520: Dual Binary Up-Counter.

These alternative models offer different features and capabilities, allowing users to choose the most suitable option for their specific requirements.

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