CD74ACT161ME4

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: High-speed, synchronous, 4-bit binary counter
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Digital logic circuit for counting and frequency division
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 125 MHz
• Number of Counting Stages: 4
• Output Type: Synchronous, parallel
• Input Type: Asynchronous, parallel load

Detailed Pin Configuration

1. CLK (Clock Input)
2. LOAD (Parallel Load Input)
3. A (Binary Input A)
4. B (Binary Input B)
5. C (Binary Input C)
6. D (Binary Input D)
7. GND (Ground)
8. QD (Output QD)
9. QC (Output QC)
10. QB (Output QB)
11. QA (Output QA)
12. VCC (Supply Voltage)

Functional Features

• Synchronous operation: The counter advances on each clock pulse.
• Parallel load capability: Allows the initial count to be loaded from external inputs.
• Asynchronous parallel load: The counter can be asynchronously loaded with a new count value while counting.
• Ripple carry output: Provides a carry signal for cascading multiple counters.

Advantages

• High-speed operation: Can operate at frequencies up to 125 MHz.
• Low power consumption: Consumes minimal power during operation.
• Compact package: Comes in a small outline integrated circuit package, saving space on PCBs.
• Versatile: Can be used in various applications requiring counting and frequency division.

Disadvantages

• Limited counting range: Being a 4-bit counter, it can count up to 15 (1111 in binary) before rolling over.
• Lack of built-in reset: Does not have a dedicated reset pin, requiring external circuitry for resetting the counter.

Working Principles

The CD74ACT161ME4 is a synchronous, 4-bit binary counter. It counts on each rising edge of the clock input and advances through the binary sequence from 0000 to 1111. The counter can be loaded with an initial count value using the parallel load input. Asynchronous parallel loading allows the counter to be loaded with a new count value while counting. The ripple carry output provides a carry signal for cascading multiple counters.

Detailed Application Field Plans

• Frequency division: The CD74ACT161ME4 can be used to divide the frequency of an input signal by a factor of 16 or less.
• Digital clocks: It can be utilized in digital clock circuits to keep track of time.
• Event counting: Suitable for applications that require counting events, such as traffic monitoring systems.
• Industrial automation: Can be employed in various industrial automation systems for counting and control purposes.

Detailed and Complete Alternative Models

• CD74ACT163ME4: Similar to CD74ACT161ME4 but with additional asynchronous clear functionality.
• CD74ACT162ME4: A 4-bit synchronous binary counter without parallel load capability.
• CD74ACT164ME4: An 8-bit serial-in/parallel-out shift register with parallel load capability.

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