74HCT670D,652

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Digital Counter
• Characteristics: High-speed operation, low power consumption, wide operating voltage range
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: 8-bit synchronous decade counter with parallel load capability
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• Input Voltage Range: -0.5V to VCC + 0.5V
• Operating Temperature Range: -40°C to +125°C
• Output Current: ±25mA
• Propagation Delay: 13ns (typical)

Detailed Pin Configuration

1. CLK (Clock Input)
2. PL (Parallel Load Input)
3. CE (Count Enable Input)
4. P0-P7 (Parallel Data Inputs)
5. Q0-Q7 (Decade Counter Outputs)
6. GND (Ground)
7. MR (Master Reset Input)
8. VCC (Supply Voltage)

Functional Features

• Synchronous counting: The counter advances on each rising edge of the clock signal.
• Parallel load capability: Allows loading of data in parallel into the counter.
• Count enable input: Enables or disables the counting operation.
• Master reset input: Resets the counter to its initial state.

Advantages

• High-speed operation: Suitable for applications requiring fast counting.
• Low power consumption: Helps conserve energy in battery-powered devices.
• Wide operating voltage range: Provides flexibility in various voltage environments.

Disadvantages

• Limited output current: May require additional buffering for driving external loads.
• Propagation delay: Can introduce timing issues in certain applications.

Working Principles

The 74HCT670D,652 is an 8-bit synchronous decade counter with parallel load capability. It counts from 0 to 9 and provides the output in binary-coded decimal (BCD) format. The counter advances on each rising edge of the clock signal when the count enable input is active. The parallel load input allows loading of data into the counter in parallel, overriding the counting operation. The master reset input resets the counter to its initial state.

Detailed Application Field Plans

• Frequency division: The counter can be used to divide an input frequency by 10.
• Digital displays: It can drive BCD decoders to display numbers on digital displays.
• Industrial automation: Suitable for counting applications in industrial control systems.
• Timing circuits: Can be used in timers and clocks for precise timekeeping.

Detailed and Complete Alternative Models

• CD4017: Decade counter with 10 outputs and similar functionality.
• SN74LS90: Decade counter with asynchronous clear and ripple carry output.
• MC14553B: Programmable BCD counter with multiplexed 7-segment outputs.

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