SN74ABT245BDBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level shifting and signal buffering
• Characteristics: High-speed, low-power, bidirectional voltage-level translator
• Package: SSOP (Shrink Small Outline Package)
• Essence: Translates signals between different voltage levels
• 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
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 4.5 ns (typical)
• Output Drive Capability: ±24 mA

Detailed Pin Configuration

The SN74ABT245BDBR has a total of 20 pins. The pin configuration is as follows:

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

Functional Features

• Bidirectional voltage-level translation between two different voltage domains
• High-speed operation with low propagation delay time
• Supports a wide range of supply voltages
• Provides output drive capability to interface with various devices
• Direction control allows for easy switching between input and output modes
• Output enable control enables/disable the outputs as needed

Advantages and Disadvantages

Advantages: - Fast and efficient voltage-level translation - Wide operating voltage range - Compact SSOP package for space-constrained applications - Robust output drive capability

Disadvantages: - Requires careful consideration of voltage compatibility between input and output domains - Limited number of data input/output pins

Working Principles

The SN74ABT245BDBR is designed to translate signals between two different voltage levels. It operates by using a combination of level-shifting circuitry and bidirectional buffers. The direction control input determines the flow of data, allowing the IC to function as either a level shifter or a signal buffer.

When the direction control input is set to one state, the IC acts as a level shifter, translating signals from one voltage domain to another. When the direction control input is set to the opposite state, the IC functions as a signal buffer, allowing bidirectional communication between devices operating at different voltage levels.

The output enable control input enables or disables the outputs, providing flexibility in controlling the flow of data. This feature is particularly useful when interfacing with multiple devices or when tri-state outputs are required.

Detailed Application Field Plans

The SN74ABT245BDBR finds application in various fields, including:

1. Microcontroller interfacing: It enables communication between microcontrollers operating at different voltage levels, allowing seamless integration of different components in a system.
2. Logic level translation: It facilitates the translation of logic signals between devices with different voltage requirements, ensuring compatibility and reliable data transfer.
3. Bus interfacing: It serves as a voltage-level translator for various bus protocols, such as I2C, SPI, and UART, enabling communication between devices with different voltage standards.
4. Mixed-voltage systems: It plays a crucial role in mixed-voltage systems, where different subsystems or modules operate at distinct voltage levels, ensuring proper signal integrity and data exchange.

Detailed and Complete Alternative Models

1. SN74LVC245A: Low-voltage CMOS Octal Bus Transceiver
2. SN74HCT245: High-Speed CMOS Octal Bus Transceiver
3. SN74LVCH245A: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
4. SN74CBT3257: Quad FET Bus Switch

These alternative models offer similar functionality and can be used as substitutes for the SN74ABT245BDBR