SN74AHCT245DBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-Speed, Low-Power, 8-Bit Bidirectional Voltage-Level Translator
• Package: SSOP-20
• Essence: This IC is designed to facilitate voltage level translation between different logic levels in various applications.
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6 ns (Max)
• Output Current: ±24 mA
• ESD Protection: >2000V

Detailed Pin Configuration

The SN74AHCT245DBR has a total of 20 pins arranged as follows:

1. OE (Output Enable) - Active LOW output enable input
2. DIR (Direction Control) - Direction control input
3. A1 - Data input/output pin for Port A
4. B1 - Data input/output pin for Port B
5. A2 - Data input/output pin for Port A
6. B2 - Data input/output pin for Port B
7. A3 - Data input/output pin for Port A
8. B3 - Data input/output pin for Port B
9. A4 - Data input/output pin for Port A
10. B4 - Data input/output pin for Port B
11. GND (Ground) - Ground reference
12. B5 - Data input/output pin for Port B
13. A5 - Data input/output pin for Port A
14. B6 - Data input/output pin for Port B
15. A6 - Data input/output pin for Port A
16. B7 - Data input/output pin for Port B
17. A7 - Data input/output pin for Port A
18. B8 - Data input/output pin for Port B
19. VCC (Supply Voltage) - Positive supply voltage
20. DIR (Direction Control) - Direction control input

Functional Features

• Bidirectional Voltage-Level Translation: Allows seamless communication between devices operating at different logic levels.
• High-Speed Operation: Provides fast data transmission with a maximum propagation delay of 6 ns.
• Low-Power Consumption: Designed to minimize power consumption, making it suitable for battery-powered applications.
• Output Enable Functionality: The OE pin allows the user to disable the outputs when not needed, reducing power consumption and preventing bus contention.

Advantages and Disadvantages

Advantages: - Efficient voltage level translation between different logic levels. - High-speed operation enables fast data transfer. - Low-power consumption extends battery life in portable devices. - Output enable functionality provides flexibility in controlling the outputs.

Disadvantages: - Limited to a specific package type (SSOP-20). - May require additional components for more complex voltage level translation scenarios.

Working Principles

The SN74AHCT245DBR is a bidirectional voltage-level translator that operates by monitoring the direction control input (DIR). When DIR is set to logic LOW, the IC translates signals from Port A to Port B. Conversely, when DIR is set to logic HIGH, the translation occurs from Port B to Port A. The OE pin can be used to enable or disable the outputs as needed.

Detailed Application Field Plans

The SN74AHCT245DBR is widely used in various applications that require voltage level translation, such as:

1. Microcontroller Interfacing: Facilitates communication between microcontrollers operating at different logic levels.
2. Sensor Networks: Enables seamless integration of sensors with different voltage requirements into a single system.
3. Industrial Automation: Allows interfacing between control systems and peripheral devices operating at different logic levels.
4. Communication Systems: Provides level shifting capabilities for data transmission between different communication protocols.

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

These alternative models offer similar functionality to the SN74AHCT245DBR and can be considered as alternatives based on specific application requirements.

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