SN74AHCT245N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-Speed, Low-Power, Non-Inverting, 8-Bit Bidirectional Transceiver
• Package: DIP (Dual In-Line Package) or SOIC (Small Outline Integrated Circuit)
• Essence: Transfers data between two bidirectional bus systems with different voltage levels
• Packaging/Quantity: Available in reels or tubes, typically sold in quantities of 25 or 50 units

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 74 MHz
• Number of Channels: 8
• Logic Family: AHCT (Advanced High-Speed CMOS)

Detailed Pin Configuration

The SN74AHCT245N has a total of 20 pins, which are arranged as follows:

1. DIR (Direction Control)
2. OE (Output Enable)
3. A1 (Data Input/Output)
4. B1 (Data Input/Output)
5. A2 (Data Input/Output)
6. B2 (Data Input/Output)
7. A3 (Data Input/Output)
8. B3 (Data Input/Output)
9. A4 (Data Input/Output)
10. B4 (Data Input/Output)
11. A5 (Data Input/Output)
12. B5 (Data Input/Output)
13. A6 (Data Input/Output)
14. B6 (Data Input/Output)
15. A7 (Data Input/Output)
16. B7 (Data Input/Output)
17. A8 (Data Input/Output)
18. B8 (Data Input/Output)
19. GND (Ground)
20. VCC (Power Supply)

Functional Features

• Bidirectional Data Transfer: Allows data to be transmitted in both directions between two bus systems.
• Level Shifting: Converts voltage levels between the input and output sides, enabling compatibility between different voltage domains.
• Non-Inverting: The data is not inverted during transmission, maintaining the same logic level.
• High-Speed Operation: Supports fast data transfer rates up to 74 MHz.
• Low Power Consumption: Designed for efficient power usage, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - Enables seamless communication between bus systems with different voltage levels. - Provides bidirectional data transfer capability. - Offers high-speed operation for quick data transmission. - Low power consumption helps conserve energy.

Disadvantages: - Limited to a maximum operating frequency of 74 MHz. - Requires careful consideration of voltage compatibility to avoid damage to connected devices.

Working Principles

The SN74AHCT245N acts as a bidirectional level shifter and bus transceiver. It allows data to be transferred between two bus systems that operate at different voltage levels. The DIR pin controls the direction of data flow, while the OE pin enables or disables the outputs. When the DIR pin is set to a specific logic level, the corresponding data inputs and outputs are connected. The non-inverting nature of the transceiver ensures that the logic levels of the data remain unchanged during transmission.

Detailed Application Field Plans

The SN74AHCT245N is commonly used in various applications, including:

1. Microcontroller Interfacing: It facilitates communication between microcontrollers operating at different voltage levels.
2. Sensor Networks: Enables data exchange between sensors and microcontrollers with varying voltage requirements.
3. Industrial Automation: Used in control systems to interface between different voltage domains.
4. Communication Systems: Facilitates data transfer between different communication protocols and voltage levels.
5. Automotive Electronics: Allows integration of components with varying voltage levels in automotive systems.

Detailed and Complete Alternative Models

1. SN74LVC245A: Low-Voltage CMOS Octal Bus Transceiver
2. SN74LVCH245A: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
3. SN74HCT245: High-Speed CMOS Octal Bus Transceiver
4. SN74LVTH245A: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs

These alternative models offer similar functionality to the SN74AHCT245N but may have different voltage ranges, power consumption, or package options.

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