DM74LS169AN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter/Shift Register
• Characteristics: TTL Logic, Synchronous Operation, 4-Bit Binary Counter with Asynchronous Clear
• Package: 16-Pin DIP (Dual In-Line Package)
• Essence: The DM74LS169AN is a 4-bit binary counter with synchronous operation and an asynchronous clear function. It is designed to be used in various applications that require counting or shifting operations.
• Packaging/Quantity: The DM74LS169AN is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage: 5V
• Logic Family: LS-TTL
• Number of Bits: 4
• Operating Temperature Range: -55°C to +125°C
• Propagation Delay: 15ns (max)
• Input Capacitance: 3pF (typ)
• Output Current: ±8mA (min)

Pin Configuration

The DM74LS169AN has a total of 16 pins, each serving a specific purpose. Here is the detailed pin configuration:

1. CLK (Clock Input)
2. P0 (Parallel Data Input)
3. P1 (Parallel Data Input)
4. P2 (Parallel Data Input)
5. P3 (Parallel Data Input)
6. MR (Master Reset Input)
7. Q0 (Serial Output)
8. Q1 (Serial Output)
9. Q2 (Serial Output)
10. Q3 (Serial Output)
11. CPD (Count Enable Parallel Input)
12. CTC (Count Enable Trickle Input)
13. CET (Count Enable Trickle Input)
14. GND (Ground)
15. VCC (Power Supply)
16. TC (Terminal Count Output)

Functional Features

• Synchronous operation with a common clock input (CLK)
• Asynchronous clear function (MR) to reset the counter
• Parallel data inputs (P0-P3) for loading initial values
• Serial output (Q0-Q3) for cascading multiple counters
• Count enable inputs (CPD, CTC, CET) for controlling counting behavior
• Terminal count output (TC) indicates when the counter reaches its maximum value

Advantages and Disadvantages

Advantages: - Synchronous operation ensures accurate and reliable counting - Asynchronous clear function allows easy resetting of the counter - Versatile parallel data inputs for flexible initialization - Serial output enables cascading of multiple counters for extended counting range

Disadvantages: - Limited to 4-bit counting, may not be suitable for applications requiring larger counters - Requires an external clock signal for proper operation

Working Principles

The DM74LS169AN operates based on synchronous counting principles. The clock input (CLK) controls the timing of each count increment. When the clock signal transitions from low to high, the counter advances by one count. The parallel data inputs (P0-P3) allow loading of initial values into the counter.

The asynchronous clear input (MR) resets the counter to zero when activated. This feature provides a convenient way to start counting from a known state. The serial output (Q0-Q3) can be used to cascade multiple counters, enabling the creation of larger counting systems.

The count enable inputs (CPD, CTC, CET) determine the counting behavior. By manipulating these inputs, various counting modes can be achieved, such as up-counting, down-counting, or no counting. The terminal count output (TC) signals when the counter reaches its maximum value, allowing external devices to respond accordingly.

Detailed Application Field Plans

The DM74LS169AN can be used in a wide range of applications that require counting or shifting operations. Some potential application fields include:

1. Digital frequency dividers
2. Time delay generators
3. Event counters
4. Data storage and retrieval systems
5. Industrial automation control systems
6. Sequential logic circuits
7. Communication equipment

Detailed and Complete Alternative Models

• SN74LS169AN
• CD74LS169AN
• MC74LS169AN
• HCF40160BE

These alternative models offer similar functionality to the DM74LS169AN and can be used as replacements depending on availability and specific requirements.

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