CD74HCT640M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Shifter
• Characteristics: High-Speed, CMOS Technology
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Bidirectional Octal Bus Transceiver
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HCT (High-Speed CMOS)
• Number of Channels: 8
• Input/Output Compatibility: TTL (Transistor-Transistor Logic) and CMOS
• Propagation Delay: 9 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HCT640M has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. A1 (Input/Output) 1
3. B1 (Input/Output) 1
4. GND (Ground)
5. B2 (Input/Output) 2
6. A2 (Input/Output) 2
7. OE (Output Enable) 2
8. VCC (Power Supply)
9. A3 (Input/Output) 3
10. B3 (Input/Output) 3
11. OE (Output Enable) 3
12. NC (No Connection)
13. B4 (Input/Output) 4
14. A4 (Input/Output) 4
15. OE (Output Enable) 4
16. GND (Ground)
17. A5 (Input/Output) 5
18. B5 (Input/Output) 5
19. OE (Output Enable) 5
20. VCC (Power Supply)

Functional Features

• Bidirectional data transfer between two bus systems
• Non-inverting outputs for both input and output data
• Output enable control for each bus
• High-speed operation suitable for various applications
• Wide operating voltage range for compatibility with different systems

Advantages and Disadvantages

Advantages:

• Allows seamless communication between different logic levels
• Supports bidirectional data transmission
• Provides non-inverting outputs for easy integration into existing systems
• High-speed operation ensures efficient data transfer

Disadvantages:

• Limited number of channels (8)
• Requires external pull-up resistors for proper operation

Working Principles

The CD74HCT640M is a bidirectional octal bus transceiver that facilitates the transfer of data between two bus systems operating at different logic levels. It utilizes CMOS technology, which allows for high-speed operation and compatibility with both TTL and CMOS logic families.

The device features non-inverting outputs, ensuring that the input and output data have the same logic level. Each bus has an output enable control, allowing selective data transfer. The CD74HCT640M operates within a wide voltage range of 2V to 6V, making it suitable for various applications.

Detailed Application Field Plans

The CD74HCT640M can be used in a wide range of applications where bidirectional data transfer between different logic levels is required. Some potential application fields include:

1. Microcontroller interfacing
2. Data communication systems
3. Industrial automation
4. Automotive electronics
5. Robotics
6. Test and measurement equipment

Detailed and Complete Alternative Models

1. SN74HCT640N - DIP (Dual In-line Package) version of the CD74HCT640M
2. MC74HCT640DW - SOIC package with wider operating temperature range (-55°C to +125°C)
3. CD74HCT641E - Similar functionality with 3-state outputs for bus isolation

These alternative models offer similar functionality and can be considered as substitutes for the CD74HCT640M depending on specific requirements.

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