SN74ACT245DBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter/Transceiver
• Characteristics: High-speed, non-inverting, bidirectional communication
• Package: SSOP-20
• Essence: Transfers data between two different voltage domains
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Logic Family: ACT
• Number of Channels: 8
• Input/Output Type: CMOS/TTL compatible
• Data Rate: Up to 120 Mbps
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

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

Functional Features

• Bidirectional data transfer between two voltage domains
• Non-inverting logic translation
• High-speed operation
• CMOS/TTL compatible inputs and outputs
• Output enable and direction control for flexible data flow management

Advantages and Disadvantages

Advantages

• Fast data transfer rates up to 120 Mbps
• Wide supply voltage range allows compatibility with various systems
• Non-inverting logic translation simplifies interfacing between different voltage levels
• Flexible data flow management through output enable and direction control pins

Disadvantages

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

Working Principles

The SN74ACT245DBR is a level shifter/transceiver IC that enables bidirectional communication between two voltage domains. It operates by translating the logic levels of the input signals from one voltage domain to the corresponding levels in the other domain. The non-inverting nature of the translation ensures that the logic states are preserved during the conversion process.

The direction control pin (DIR) determines the direction of data flow, while the output enable pin (OE) enables or disables the outputs. By controlling these pins, the user can manage the data flow according to their requirements.

Detailed Application Field Plans

The SN74ACT245DBR is commonly used in various applications where data needs to be transferred between different voltage domains. Some of the typical application fields include:

1. Microcontroller interfacing: The IC facilitates communication between microcontrollers operating at different voltage levels.
2. Communication systems: It is used in level shifting applications within serial communication interfaces such as UART, SPI, and I2C.
3. Industrial automation: The IC enables data exchange between different subsystems in industrial automation setups.
4. Automotive electronics: It is employed in automotive systems to interface components operating at different voltage levels, such as sensors and control units.
5. Consumer electronics: The IC finds applications in devices that require level shifting, such as smartphones, tablets, and gaming consoles.

Detailed and Complete Alternative Models

1. SN74ACT244DBR: Octal buffer/line driver with 3-state outputs
2. SN74LVC245APWR: Octal bus transceiver with 3-state outputs
3. SN74HCT245N: Octal bus transceiver with 3-state outputs
4. SN74LVCH245ADBR: Octal bus transceiver with 3-state outputs
5. SN74LVC8T245PWR: 8-bit dual-supply bus transceiver with configurable voltage translation

These alternative models offer similar functionality to the SN74ACT245DBR and can be considered based on specific application requirements.

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