Encyclopedia Entry: 74VHC244TTR

Product Overview

Category

The 74VHC244TTR belongs to the category of integrated circuits (ICs) and specifically falls under the family of VHC logic gates.

Use

This product is commonly used in digital electronics for signal amplification, buffering, and level shifting purposes. It serves as a non-inverting octal buffer/line driver with 3-state outputs.

Characteristics

• High-speed operation: The 74VHC244TTR offers fast switching times, making it suitable for applications requiring quick response.
• Wide voltage range: It operates within a wide voltage range, typically between 2V and 5.5V, allowing compatibility with various systems.
• Low power consumption: This IC consumes minimal power, making it energy-efficient.
• 3-state outputs: The 74VHC244TTR features 3-state outputs, enabling multiple devices to share a common bus without interference.

Package and Quantity

The 74VHC244TTR is available in a TSSOP-20 package, which stands for Thin Shrink Small Outline Package. It consists of a thin plastic body with 20 leads. The product is typically sold in reels or tubes, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 2V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 125 MHz
• Propagation Delay Time: 4.3 ns (max)
• Output Current: ±8 mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The 74VHC244TTR has a total of 20 pins, numbered from 1 to 20. The pin configuration is as follows:

___________ OE --|1 20|-- VCC A0 --|2 19|-- B0 A1 --|3 18|-- B1 A2 --|4 17|-- B2 A3 --|5 16|-- B3 A4 --|6 15|-- B4 A5 --|7 14|-- B5 A6 --|8 13|-- B6 A7 --|9 12|-- B7 GND --|10 11|-- Y |__________|

Functional Features

The 74VHC244TTR offers the following functional features:

• Non-inverting buffer: It amplifies and reproduces input signals without altering their logic levels.
• 3-state outputs: The outputs can be put into a high-impedance state, allowing multiple devices to share the same bus without interference.
• High-speed operation: The IC provides fast switching times, ensuring quick signal propagation.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient signal processing.
• Wide voltage range allows compatibility with various systems.
• Low power consumption ensures energy efficiency.
• 3-state outputs facilitate bus sharing among multiple devices.

Disadvantages

• Limited output current may restrict its use in certain applications requiring higher current capabilities.
• Propagation delay time may affect timing-sensitive operations in some scenarios.

Working Principles

The 74VHC244TTR operates based on CMOS (Complementary Metal-Oxide-Semiconductor) technology. It utilizes MOSFET transistors to amplify and reproduce digital signals. When an input signal is received, the IC amplifies it and produces an identical output signal, maintaining the logic level. The 3-state outputs allow the IC to disconnect from the bus, preventing signal interference when not actively driving the line.

Application Field Plans

The 74VHC244TTR finds applications in various digital electronic systems, including but not limited to:

1. Microcontrollers and microprocessors
2. Data communication systems
3. Memory interfaces
4. Industrial automation
5. Automotive electronics
6. Consumer electronics

Alternative Models

For those seeking alternative options, the following models can be considered:

1. SN74LV244A: This IC offers similar functionality with a lower voltage range (1.65V to 5.5V) and a higher maximum operating frequency (150 MHz).
2. MC74VHC244: This IC is functionally equivalent to the 74VHC244TTR, but it comes in a different package (SOIC-20).

These alternatives provide similar features and can be used as substitutes depending on specific requirements.

In conclusion, the 74VHC244TTR is a versatile integrated circuit that serves as a non-inverting octal buffer/line driver. Its high-speed operation, wide