Encyclopedia Entry: 74HCT670D,653

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Counter
• Characteristics: High-Speed, CMOS Logic, Synchronous Operation
• Package: SOIC-16
• Essence: The 74HCT670D,653 is a digital counter IC that operates synchronously and is commonly used in various digital applications.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Supply Voltage: 2.0V to 6.0V
• Logic Family: HCT
• Number of Stages: 4-Bit Binary Counter
• Operating Temperature Range: -40°C to +125°C
• Propagation Delay: 13 ns (Typical)
• Output Current: ±4 mA
• Input Capacitance: 3 pF (Typical)

Pin Configuration

The 74HCT670D,653 IC has a total of 16 pins arranged as follows:

__ __ Q1 |1 \__/ 16| VCC Q2 |2 15| Q0 Q3 |3 14| CLK Q4 |4 13| MR GND |5 12| CE D0 |6 11| D3 D1 |7 10| D2 D2 |8 9| D1 ‾‾ ‾‾

Functional Features

• Synchronous operation allows precise control over the counting process.
• High-speed performance enables efficient counting in time-critical applications.
• CMOS logic ensures low power consumption and compatibility with a wide range of devices.
• Multiple counter stages provide flexibility in counting sequences.

Advantages

• Reliable and accurate counting performance.
• Low power consumption.
• Wide operating voltage range allows compatibility with various power supply configurations.
• Compact SOIC-16 package offers space-saving benefits.

Disadvantages

• Limited number of counter stages may restrict the maximum count value.
• Propagation delay may affect real-time applications with strict timing requirements.

Working Principles

The 74HCT670D,653 is a synchronous counter that operates based on clock signals. When the clock input (CLK) receives a rising edge, the counter increments its count value by one. The counter can be reset to zero using the master reset input (MR). The count enable input (CE) controls whether the counter responds to clock signals or remains in a hold state. The data inputs (D0-D3) determine the initial count value when the counter is enabled.

Detailed Application Field Plans

The 74HCT670D,653 finds applications in various digital systems where counting functionality is required. Some common application fields include: 1. Digital frequency dividers 2. Event counters 3. Timekeeping circuits 4. Industrial automation systems 5. Communication equipment

Alternative Models

• 74HC670: Similar functionality but operates at a higher voltage range (2V to 6V).
• CD40193: 4-bit synchronous up/down counter with similar characteristics.
• SN74LS669: 4-bit binary synchronous counter with parallel load capability.

In conclusion, the 74HCT670D,653 is a versatile digital counter IC that offers reliable and efficient counting capabilities. Its high-speed operation, low power consumption, and compact package make it suitable for various digital applications. However, designers should consider the limited number of counter stages and propagation delay when selecting this IC for time-critical applications.