SN74AHC245PWR

Overview

Category: Integrated Circuit (IC)

Use: Level Shifter and Bus Transceiver

Characteristics: - High-Speed CMOS Technology - 8-Bit Bidirectional Voltage-Level Translator - Wide Operating Voltage Range: 2 V to 5.5 V - Non-Inverting Outputs - Low Power Consumption - Schmitt-Trigger Inputs - ESD Protection Exceeds JESD 22

Package: TSSOP (Thin Shrink Small Outline Package)

Essence: The SN74AHC245PWR is a level shifter and bus transceiver IC that allows bidirectional voltage-level translation between different logic levels. It is commonly used in applications where interfacing between devices operating at different voltage levels is required.

Packaging/Quantity: The SN74AHC245PWR is available in a TSSOP package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2 V to 5.5 V
• Input Voltage Range: 0 V to VCC
• Output Voltage Range: 0 V to VCC
• Input Current: ±20 mA
• Output Current: ±35 mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The SN74AHC245PWR has a total of 20 pins, which are assigned as follows:

1. DIR (Direction Control)
2. OE (Output Enable)
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. GND (Ground)
12. B5 (Data Input/Output)
13. A5 (Data Input/Output)
14. B6 (Data Input/Output)
15. A6 (Data Input/Output)
16. B7 (Data Input/Output)
17. A7 (Data Input/Output)
18. B8 (Data Input/Output)
19. A8 (Data Input/Output)
20. VCC (Supply Voltage)

Functional Features

• Bidirectional Voltage-Level Translation: The SN74AHC245PWR allows for seamless translation of logic levels between different voltage domains, enabling communication between devices operating at different voltage levels.
• Non-Inverting Outputs: The IC provides non-inverted output signals, maintaining the same logic polarity as the input signals.
• Schmitt-Trigger Inputs: The Schmitt-trigger inputs ensure robust and noise-immune operation, enhancing the reliability of the level shifting process.
• ESD Protection: The IC incorporates ESD protection that exceeds JESD 22 standards, safeguarding against electrostatic discharge events.

Advantages and Disadvantages

Advantages: - Wide operating voltage range enables compatibility with a variety of devices. - High-speed CMOS technology allows for fast data transmission. - Low power consumption minimizes energy usage. - Schmitt-trigger inputs provide noise immunity and reliable operation. - ESD protection ensures device durability.

Disadvantages: - May not be suitable for applications requiring level shifting beyond the specified voltage range. - Limited number of bidirectional channels (8-bit).

Working Principles

The SN74AHC245PWR operates by utilizing a combination of CMOS technology and level-shifting circuitry. When the DIR pin is set to a specific logic level, the IC determines the direction of data flow. The OE pin controls the enable/disable state of the outputs. The input data is translated to the corresponding output voltage level, allowing bidirectional communication between devices operating at different voltage levels.

Detailed Application Field Plans

The SN74AHC245PWR finds applications in various fields, including:

1. Microcontroller Interfacing: It enables communication between microcontrollers operating at different voltage levels, facilitating seamless integration into complex systems.
2. Sensor Networks: The IC allows for level shifting between sensors and microcontrollers, enabling data exchange in sensor networks with varying voltage requirements.
3. Industrial Automation: It can be used in industrial automation systems to interface between different control modules operating at different voltage levels.
4. Embedded Systems: The IC facilitates communication between embedded systems components, such as microprocessors, memory modules, and peripheral devices, that operate at different voltage levels.

Detailed and Complete Alternative Models

1. SN74LVC245APW: Similar to SN74AHC245PWR, but operates at a lower voltage range (1.65 V to 3.6 V).
2. SN74LVCH245APW: Another alternative with a wider supply voltage