SN74AHC245PWRE4

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter/Transceiver
• Characteristics: High-Speed, Non-Inverting, 8-Bit, Bidirectional
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Logic Level Translation and Signal Conditioning
• 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
• Number of Channels: 8
• Input/Output Type: Tri-State

Detailed Pin Configuration

The SN74AHC245PWRE4 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 1
4. B1 - Data Input/Output 2
5. A2 - Data Input/Output 3
6. B2 - Data Input/Output 4
7. A3 - Data Input/Output 5
8. B3 - Data Input/Output 6
9. A4 - Data Input/Output 7
10. B4 - Data Input/Output 8
11. GND - Ground
12. B5 - Data Input/Output 9
13. A5 - Data Input/Output 10
14. B6 - Data Input/Output 11
15. A6 - Data Input/Output 12
16. B7 - Data Input/Output 13
17. A7 - Data Input/Output 14
18. B8 - Data Input/Output 15
19. A8 - Data Input/Output 16
20. VCC - Supply Voltage

Functional Features

• Bidirectional Level Shifting: Allows for bidirectional data transfer between devices operating at different voltage levels.
• Non-Inverting Logic: Maintains the same logic polarity between input and output signals.
• High-Speed Operation: Supports data rates up to 100 MHz, enabling fast signal transmission.
• Tri-State Outputs: Provides the ability to disable the outputs, allowing multiple devices to share a common bus.

Advantages and Disadvantages

Advantages: - Efficient level shifting between different voltage domains. - Non-inverting logic preserves signal integrity. - High-speed operation enables rapid data transfer. - Tri-state outputs allow for bus sharing.

Disadvantages: - Limited supply voltage range (2 V to 5.5 V). - Not suitable for applications requiring higher operating frequencies.

Working Principles

The SN74AHC245PWRE4 is designed to facilitate the translation of digital signals between different voltage levels. It operates by receiving data from one voltage domain and converting it to the appropriate voltage level for transmission to another domain. The direction control input (DIR) determines the direction of data flow, while the output enable input (OE) enables or disables the outputs. The device uses non-inverting logic, ensuring that the output signal maintains the same logical state as the input signal.

Detailed Application Field Plans

The SN74AHC245PWRE4 is widely used in various applications that require level shifting and signal conditioning. Some of the common application fields include:

1. Microcontroller Interfacing: The IC is used to interface microcontrollers operating at different voltage levels, allowing them to communicate with each other effectively.

2. Communication Systems: It is employed in communication systems to enable data transfer between devices operating at different voltage domains, such as UART, SPI, and I2C interfaces.

3. Industrial Automation: The IC finds applications in industrial automation systems where it facilitates the exchange of signals between sensors, actuators, and control units.

4. Automotive Electronics: It is utilized in automotive electronics for level shifting between different components, such as microcontrollers, sensors, and displays.

5. Consumer Electronics: The IC is integrated into various consumer electronic devices, including smartphones, tablets, and gaming consoles, to ensure compatibility between different voltage levels.

Detailed and Complete Alternative Models

1. SN74LVC245APW: Low-Voltage CMOS Octal Bus Transceiver
2. SN74HCT245N: High-Speed CMOS Octal Bus Transceiver
3. SN74LVCH245ADBR: Low-Voltage CMOS Octal Bus Transceiver