SN74AHC245QDWRQ1

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter/Transceiver
• Characteristics: High-Speed, Non-Inverting, Bidirectional
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Logic Level Translator
• 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
• High-Level Input Voltage: 0.7 x VCC to VCC
• Low-Level Input Voltage: 0 V to 0.3 x VCC
• High-Level Output Voltage: 0.9 x VCC to VCC
• Low-Level Output Voltage: 0 V to 0.1 x VCC
• Maximum Operating Frequency: 100 MHz

Detailed Pin Configuration

The SN74AHC245QDWRQ1 has a total of 20 pins. The pin configuration is as follows:

1. DIR (Direction Control)
2. OE (Output Enable)
3. A1 (Input/Output Port A)
4. A2 (Input/Output Port A)
5. A3 (Input/Output Port A)
6. A4 (Input/Output Port A)
7. A5 (Input/Output Port A)
8. GND (Ground)
9. B1 (Input/Output Port B)
10. B2 (Input/Output Port B)
11. B3 (Input/Output Port B)
12. B4 (Input/Output Port B)
13. B5 (Input/Output Port B)
14. VCC (Supply Voltage)
15. NC (No Connection)
16. NC (No Connection)
17. NC (No Connection)
18. NC (No Connection)
19. NC (No Connection)
20. GND (Ground)

Functional Features

• Bidirectional Level Shifting: Allows for bidirectional voltage translation between two different logic levels.
• Non-Inverting: The input signal is not inverted at the output, maintaining the same logic level.
• High-Speed Operation: Capable of operating at frequencies up to 100 MHz.
• Output Enable Control: The OE pin can be used to disable the outputs, allowing for easy control of data flow.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows for compatibility with various systems. - Non-inverting operation simplifies interfacing between different logic families. - High-speed operation enables fast data transfer. - Output enable control provides flexibility in managing data flow.

Disadvantages: - Limited maximum operating frequency compared to some other level shifters. - Only supports bidirectional communication between two ports.

Working Principles

The SN74AHC245QDWRQ1 is a bidirectional level shifter/transceiver that allows for voltage translation between two different logic levels. It operates by using a combination of CMOS technology and non-inverting buffers. 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 logic high, data is transferred from Port A to Port B. Conversely, when the DIR pin is set to a logic low, data is transferred from Port B to Port A. The non-inverting nature of the device ensures that the logic level of the input signal is maintained at the output.

Detailed Application Field Plans

The SN74AHC245QDWRQ1 is commonly used in various applications where voltage translation is required. Some of the typical application fields include:

1. Microcontroller Interfacing: The level shifter can be used to interface microcontrollers operating at different logic levels.
2. Communication Systems: It is suitable for voltage translation in communication systems, such as UART, SPI, and I2C interfaces.
3. Mixed Voltage Systems: The device enables communication between circuits operating at different supply voltages.
4. Industrial Automation: It finds applications in industrial automation systems where different logic levels are present.

Detailed and Complete Alternative Models

1. SN74LVC245A: Low-Voltage CMOS Octal Bus Transceiver
2. SN74LVCH245A: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
3. SN74HCT245: High-Speed CMOS Octal Bus Transceiver
4. SN74AHCT125: Quadruple Bus Buffer Gates with 3-State Outputs

These alternative models offer similar functionality and can be considered as alternatives to the SN74AHC245QDWRQ1 based on specific requirements and design considerations.

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