SN74LS245DBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Transceiver
• Characteristics:
  • High-speed, low-power device
  • Bidirectional data transfer capability
  • Compatible with TTL logic levels
• Package: SSOP-20
• Essence: Transfers data between two bidirectional bus systems
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Input Voltage Range: 0V to 5.25V
• Output Voltage Range: 0V to 5.25V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 9ns (Max)
• Output Current: ±24mA

Detailed Pin Configuration

The SN74LS245DBR has a total of 20 pins arranged as follows:

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

Functional Features

• Bidirectional data transfer between two bus systems
• Direction control pin for selecting the data flow direction
• Output enable pin to disable the outputs when not needed
• TTL compatible inputs and outputs for easy integration with other logic devices
• High-speed operation with low power consumption

Advantages and Disadvantages

Advantages: - High-speed data transfer - Low power consumption - Compatibility with TTL logic levels - Easy integration with other logic devices

Disadvantages: - Limited number of bidirectional data lines (8 in total) - Requires external control signals for proper operation

Working Principles

The SN74LS245DBR is a bus transceiver that allows bidirectional data transfer between two bus systems. It operates based on the control signals provided to the DIR and OE pins. When the DIR pin is set to a specific logic level, the data flow direction is determined. The OE pin enables or disables the outputs of the device.

Detailed Application Field Plans

The SN74LS245DBR is commonly used in various applications, including:

1. Microprocessor-based systems
2. Data communication systems
3. Industrial automation
4. Automotive electronics
5. Consumer electronics

Detailed and Complete Alternative Models

1. SN74LS244: Octal Buffer/Line Driver with 3-State Outputs
2. SN74LS240: Octal Inverter/Buffer with 3-State Outputs
3. SN74LS373: Octal Transparent Latch with 3-State Outputs
4. SN74LS541: Octal Buffer/Line Driver with 3-State Outputs
5. SN74LS646: Octal Bus Transceiver with 3-State Outputs

These alternative models offer similar functionality and can be used as substitutes for the SN74LS245DBR in various applications.

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