SN74AHC245DBR

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-Speed, Low-Power, Non-Inverting, Bidirectional
• Package: SSOP (Shrink Small Outline Package)
• Essence: Transfers data between different voltage levels in a bidirectional manner
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2 V to 5.5 V
• Input Voltage Range: 0 V to VCC
• Output Voltage Range: 0 V to VCC
• Maximum Operating Frequency: 100 MHz
• Number of Channels: 8
• Input/Output Type: Tri-State
• Propagation Delay: 6 ns (Max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. DIR (Direction Control) - Controls the direction of data flow
2. OE (Output Enable) - Enables or disables the outputs
3. A1-A8 (Input/Output Pins) - Data input/output pins
4. B1-B8 (Input/Output Pins) - Data input/output pins
5. GND (Ground) - Ground reference
6. VCC (Supply Voltage) - Power supply input

Functional Features

• Bidirectional level shifting between two voltage domains
• Non-inverting translation of logic levels
• High-speed operation with low power consumption
• Tri-state outputs for bus sharing capability
• ESD protection on all inputs and outputs

Advantages

• Allows interfacing between devices operating at different voltage levels
• Provides reliable and efficient data transfer
• Supports high-speed communication
• Low power consumption enhances energy efficiency
• Tri-state outputs enable bus sharing among multiple devices

Disadvantages

• Limited to a maximum operating frequency of 100 MHz
• Requires careful consideration of voltage compatibility between devices

Working Principles

The SN74AHC245DBR is a bidirectional level shifter and bus transceiver. It facilitates the transfer of data between two voltage domains, ensuring compatibility between devices operating at different logic levels. The device utilizes non-inverting translation, maintaining the logical integrity of the data during the transfer process. Tri-state outputs allow multiple devices to share a common bus, enhancing system flexibility.

Detailed Application Field Plans

1. Microcontroller Interfacing: The SN74AHC245DBR can be used to interface microcontrollers operating at different voltage levels, enabling seamless communication between them.
2. Sensor Networks: It can be employed in sensor networks where sensors with varying voltage requirements need to communicate with a central controller.
3. Industrial Automation: The device finds applications in industrial automation systems, allowing for the exchange of data between different components operating at distinct voltage levels.
4. Communication Interfaces: It can be utilized in various communication interfaces, such as UART, SPI, or I2C, to enable communication between devices with different voltage specifications.

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. SN74AHCT125: Quadruple Bus Buffer Gates with 3-State Outputs

These alternative models offer similar functionality and can be considered based on specific application requirements.

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