SN74HCT645DWR

Product Overview

Category

SN74HCT645DWR belongs to the category of integrated circuits (ICs).

Use

It is commonly used as a bidirectional octal bus transceiver.

Characteristics

• High-speed CMOS technology
• 8-bit wide bidirectional bus interface
• Voltage level translation between 5V and 3.3V systems
• Non-inverting outputs for easy cascading
• Schmitt-trigger inputs for noise immunity

Package

SN74HCT645DWR is available in a standard SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of SN74HCT645DWR lies in its ability to facilitate bidirectional communication between two buses with different voltage levels.

Packaging/Quantity

SN74HCT645DWR is typically packaged in reels, with 2500 units per reel.

Specifications

• Supply voltage: 2V to 6V
• Input voltage range: 0V to VCC
• Output voltage range: 0V to VCC
• Maximum input current: ±20mA
• Maximum output current: ±35mA
• Operating temperature range: -40°C to +85°C

Detailed Pin Configuration

1. A1: Bus A, bit 1
2. A2: Bus A, bit 2
3. A3: Bus A, bit 3
4. A4: Bus A, bit 4
5. A5: Bus A, bit 5
6. A6: Bus A, bit 6
7. A7: Bus A, bit 7
8. A8: Bus A, bit 8
9. GND: Ground
10. B8: Bus B, bit 8
11. B7: Bus B, bit 7
12. B6: Bus B, bit 6
13. B5: Bus B, bit 5
14. B4: Bus B, bit 4
15. B3: Bus B, bit 3
16. B2: Bus B, bit 2
17. B1: Bus B, bit 1
18. OE: Output Enable
19. DIR: Direction Control
20. VCC: Supply Voltage

Functional Features

• Bidirectional data transfer between two buses
• Voltage level translation for compatibility between different systems
• Non-inverting outputs allow easy cascading of multiple devices
• Schmitt-trigger inputs provide noise immunity and signal conditioning

Advantages and Disadvantages

Advantages

• High-speed operation
• Wide voltage range support
• Noise-immune inputs
• Easy cascading capability

Disadvantages

• Limited number of bidirectional bus lines (8 in this case)
• Requires external control signals for direction and output enable

Working Principles

SN74HCT645DWR operates by receiving data from one bus and transmitting it to the other bus bidirectionally. The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the outputs. The device uses CMOS technology to ensure high-speed operation and voltage level translation between different systems.

Detailed Application Field Plans

SN74HCT645DWR finds applications in various fields where bidirectional communication between buses with different voltage levels is required. Some common application areas include:

1. Microcontroller interfacing
2. Data communication systems
3. Industrial automation
4. Automotive electronics
5. Networking equipment

Detailed and Complete Alternative Models

1. SN74HCT245N
2. CD74HCT245E
3. MC74HCT245AN
4. 74HCT245D

These alternative models offer similar functionality and can be used as replacements for SN74HCT645DWR in various applications.

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