SN74ALS245ADWRE4

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-Speed, Non-Inverting, 8-Bit Bidirectional Transceiver
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: This IC is designed to shift the voltage levels between two different logic families, allowing bidirectional communication between them.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 4.5V to 5.5V
• Logic Family: ALS
• Number of Channels: 8
• Input/Output Compatibility: TTL/CMOS
• Propagation Delay: 10ns (Max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74ALS245ADWRE4 has a total of 20 pins. The pin configuration is as follows:

1. DIR (Direction Control Input)
2. OE (Output Enable Input)
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 (Supply Voltage)

Functional Features

• Bidirectional data transfer between two logic families
• Non-inverting logic levels
• High-speed operation
• Output enable control for tri-state outputs
• Direction control for selecting data flow direction

Advantages and Disadvantages

Advantages: - Allows communication between different logic families - Non-inverting logic levels preserve signal integrity - High-speed operation enables fast data transfer - Tri-state outputs provide flexibility in bus systems

Disadvantages: - Limited to 8-bit bidirectional data transfer - Requires external control signals for direction and output enable

Working Principles

The SN74ALS245ADWRE4 is a level shifter and bus transceiver integrated circuit. It operates by shifting the voltage levels between two different logic families, typically TTL and CMOS. The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the outputs.

When the DIR pin is set to a specific logic level, the data is transferred bidirectionally between the A and B ports. The non-inverting nature of the IC ensures that the logic levels are preserved during the transfer.

The OE pin allows the outputs to be tri-stated, which means they can be disconnected from the bus when not needed. This feature is particularly useful in bus systems where multiple devices share the same data lines.

Detailed Application Field Plans

The SN74ALS245ADWRE4 is commonly used in various applications, including:

1. Microcontroller interfacing with different logic families
2. Level shifting in mixed-signal systems
3. Bus transceivers in communication protocols such as I2C and SPI
4. Data communication between different modules in embedded systems
5. Signal buffering and isolation in industrial automation

Detailed and Complete Alternative Models

1. SN74ALS244ADWRE4: Octal Buffer/Line Driver with 3-State Outputs
2. SN74ALS240ADWRE4: Octal Inverter/Buffer with 3-State Outputs
3. SN74ALS541ADWRE4: Octal Buffer/Line Driver with 3-State Outputs and Schmitt-Trigger Inputs
4. SN74ALS573ADWRE4: Octal D-Type Transparent Latch with 3-State Outputs

These alternative models offer similar functionality to the SN74ALS245ADWRE4 and can be used as replacements depending on specific requirements.

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