Texas Instruments
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SN74LS245NSRE4
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SN74LS245NSRE4

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Level Shifter and Bus Transceiver
  • Characteristics: High-speed, low-power consumption, bidirectional data transfer
  • Package: 20-pin small outline integrated circuit (SOIC)
  • Essence: Transfers data between different voltage levels in digital systems
  • Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

  • Supply Voltage: 4.5V to 5.5V
  • Input Voltage Levels: TTL compatible
  • Output Voltage Levels: TTL compatible
  • Data Transfer Rate: Up to 125 Mbps
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay: 10 ns (typical)

Detailed Pin Configuration

  1. A1: Data Input/Output A1
  2. B1: Data Input/Output B1
  3. GND: Ground
  4. A2: Data Input/Output A2
  5. B2: Data Input/Output B2
  6. DIR: Direction Control Input
  7. VCC: Supply Voltage
  8. OE: Output Enable Input
  9. B3: Data Input/Output B3
  10. A3: Data Input/Output A3
  11. B4: Data Input/Output B4
  12. A4: Data Input/Output A4
  13. B5: Data Input/Output B5
  14. A5: Data Input/Output A5
  15. B6: Data Input/Output B6
  16. A6: Data Input/Output A6
  17. B7: Data Input/Output B7
  18. A7: Data Input/Output A7
  19. GND: Ground
  20. VCC: Supply Voltage

Functional Features

  • Bidirectional data transfer between two voltage domains
  • TTL compatible input and output voltage levels
  • High-speed operation with low propagation delay
  • Output enable control for tri-state operation
  • Direction control for selecting data flow direction

Advantages

  • Enables seamless communication between different voltage level systems
  • High-speed data transfer capability
  • Low power consumption
  • Compact SOIC package for space-constrained applications
  • Easy integration into digital systems

Disadvantages

  • Limited to TTL compatible voltage levels
  • Not suitable for high-voltage applications
  • Requires external control signals for direction and output enable

Working Principles

The SN74LS245NSRE4 is a bidirectional level shifter and bus transceiver IC. It allows data transfer between two voltage domains in digital systems. The direction of data flow is controlled by the DIR pin, while the OE pin enables or disables the outputs. The IC operates at TTL compatible voltage levels and ensures high-speed data transfer with minimal propagation delay.

Detailed Application Field Plans

  1. Interfacing between microcontrollers operating at different voltage levels
  2. Communication between digital logic circuits with varying voltage requirements
  3. Level shifting in serial communication interfaces (e.g., UART, SPI, I2C)
  4. Bus transceiver in multi-voltage domain systems
  5. Signal conversion in mixed-voltage level systems

Detailed and Complete Alternative Models

  1. SN74LVC245A: Low-Voltage CMOS Octal Bus Transceiver
  2. CD4508B: CMOS Dual 4-Bit Latch/4-to-8 Line Decoder
  3. MC74VHC245: Octal Bus Transceiver with 3-State Outputs
  4. SN74LVCH245A: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
  5. CD74HCT245: High-Speed CMOS Logic Octal Bus Transceiver

These alternative models offer similar functionality and can be used as substitutes for the SN74LS245NSRE4 in various applications.

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Énumérez 10 questions et réponses courantes liées à l'application de SN74LS245NSRE4 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of SN74LS245NSRE4:

1. What is SN74LS245NSRE4? SN74LS245NSRE4 is a non-inverting octal bus transceiver with 3-state outputs. It is commonly used for bidirectional data transfer between different voltage levels in various technical solutions.

2. What is the operating voltage range of SN74LS245NSRE4? The operating voltage range of SN74LS245NSRE4 is typically between 4.75V and 5.25V.

3. What is the maximum data transfer rate supported by SN74LS245NSRE4? SN74LS245NSRE4 can support data transfer rates up to 15 MHz.

4. Can SN74LS245NSRE4 be used for level shifting between different voltage domains? Yes, SN74LS245NSRE4 is commonly used for level shifting between different voltage domains, making it suitable for interfacing between devices operating at different logic levels.

5. How many bidirectional data lines can SN74LS245NSRE4 handle? SN74LS245NSRE4 can handle 8 bidirectional data lines.

6. Does SN74LS245NSRE4 have 3-state outputs? Yes, SN74LS245NSRE4 has 3-state outputs, which means it can effectively disconnect the output from the bus when not actively transmitting or receiving data.

7. Can SN74LS245NSRE4 be used in both parallel and serial communication systems? Yes, SN74LS245NSRE4 can be used in both parallel and serial communication systems, depending on the specific requirements of the application.

8. Is SN74LS245NSRE4 compatible with TTL logic levels? Yes, SN74LS245NSRE4 is compatible with TTL logic levels, making it suitable for use in systems that utilize TTL-compatible devices.

9. What is the maximum output current of SN74LS245NSRE4? The maximum output current of SN74LS245NSRE4 is typically around 24 mA.

10. Can SN74LS245NSRE4 be used in high-speed applications? While SN74LS245NSRE4 can support data transfer rates up to 15 MHz, it may not be suitable for very high-speed applications. For such applications, other faster transceiver options may be more appropriate.

Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.