SN74LS293D

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: 4-bit synchronous binary counter with parallel load
• Package: DIP (Dual In-line Package)
• Essence: The SN74LS293D is a versatile counter IC that can be used in various applications requiring counting functionality.
• Packaging/Quantity: Available in tubes or reels, typically containing 25 or 250 units.

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Operating Temperature Range: -40°C to 85°C
• Maximum Clock Frequency: 25 MHz
• Number of Counting Stages: 4
• Maximum Count Value: 15 (binary)
• Input Compatibility: TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor)
• Output Compatibility: TTL

Detailed Pin Configuration

The SN74LS293D has a total of 16 pins, each serving a specific function:

1. CP (Clock Pulse): Input pin for clock signal.
2. MR (Master Reset): Active low input pin for resetting the counter.
3. P0-P3 (Parallel Data Inputs): Input pins for loading initial count value.
4. QA-QD (Outputs): Binary output pins representing the current count value.
5. GND (Ground): Common ground reference.
6. VCC (Supply Voltage): Positive power supply pin.

Functional Features

• Synchronous Operation: The counter advances on each clock pulse, ensuring accurate counting.
• Parallel Load Capability: Allows the user to load a specific count value into the counter using the parallel data inputs.
• Ripple Blanking Outputs: Provides blanking signals during the counting process to prevent false triggering.
• Carry Output: Indicates when the maximum count value has been reached.
• Master Reset: Allows the counter to be reset to its initial state.

Advantages and Disadvantages

Advantages: - Versatile and flexible counter IC suitable for various applications. - Synchronous operation ensures accurate counting. - Parallel load capability allows for easy initialization of count value. - Compatible with both TTL and CMOS logic levels.

Disadvantages: - Limited maximum count value (15 in binary). - Requires an external clock signal for operation.

Working Principles

The SN74LS293D is a synchronous counter that uses flip-flops to store and propagate the count value. On each clock pulse, the counter advances by one count. The parallel load capability allows the user to set an initial count value by providing the desired binary input through the parallel data inputs. The counter can be reset to its initial state using the master reset input.

Detailed Application Field Plans

The SN74LS293D can be used in various applications that require counting functionality, such as:

1. Frequency Dividers: Used to divide the frequency of an input signal by a specific factor.
2. Event Counters: Used to count the occurrence of specific events or pulses.
3. Time Delay Generators: Used to generate precise time delays based on the clock frequency and count value.
4. Digital Timers: Used to measure elapsed time or control timing sequences.

Detailed and Complete Alternative Models

Some alternative models to the SN74LS293D include:

1. CD4029: 4-bit synchronous presettable up/down counter.
2. 74HC163: 4-bit synchronous binary counter with asynchronous reset.
3. CD4516: 4-bit synchronous binary up/down counter with load.

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

Word count: 334 words