SN74HCT244PWE4

Overview

Category: Integrated Circuit (IC)

Use: Buffer/Line Driver

Characteristics: - High-speed CMOS logic - 3-state outputs - Wide operating voltage range - Low power consumption - Schmitt-trigger inputs for noise immunity

Package: TSSOP (Thin Shrink Small Outline Package)

Essence: The SN74HCT244PWE4 is a high-speed CMOS buffer/line driver IC that provides 8-bit buffering with 3-state outputs. It is commonly used in digital systems to amplify and buffer signals, ensuring proper signal transmission between different components.

Packaging/Quantity: The SN74HCT244PWE4 is available in a TSSOP package and is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 74 MHz
• Number of Channels: 8
• Output Current: ±6mA
• Propagation Delay: 13 ns (max)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The SN74HCT244PWE4 has a total of 20 pins, which are assigned as follows:

1. A1
2. Y1
3. A2
4. Y2
5. A3
6. Y3
7. A4
8. Y4
9. GND
10. Y5
11. A5
12. Y6
13. A6
14. Y7
15. A7
16. Y8
17. VCC
18. OE (Output Enable)
19. GND
20. OE (Output Enable)

Functional Features

• High-speed operation: The SN74HCT244PWE4 can operate at a maximum frequency of 74 MHz, making it suitable for high-speed digital systems.
• 3-state outputs: The IC provides 3-state outputs, allowing multiple devices to share the same bus without interfering with each other.
• Schmitt-trigger inputs: The Schmitt-trigger inputs ensure noise immunity by providing hysteresis and reducing the effects of input signal noise.

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows compatibility with various power supply voltages. - Low power consumption helps in reducing overall system power requirements. - Schmitt-trigger inputs provide improved noise immunity, ensuring reliable signal transmission.

Disadvantages: - Limited output current may restrict its use in applications requiring higher current drive capabilities. - Propagation delay of 13 ns (max) may introduce timing issues in certain high-speed applications.

Working Principles

The SN74HCT244PWE4 operates as a buffer/line driver by amplifying and buffering digital signals. It accepts input signals on the A1-A7 pins and provides amplified output signals on the Y1-Y8 pins. The OE (Output Enable) pins control the output state, allowing the device to be enabled or disabled as required.

Detailed Application Field Plans

The SN74HCT244PWE4 is commonly used in various digital systems and applications, including: - Microcontrollers and microprocessors - Data communication systems - Memory interfaces - Industrial automation - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the SN74HCT244PWE4 are: - 74HC244: Similar functionality but operates at a lower voltage range (2V to 6V). - SN74LS244: TTL logic compatible, but operates at a higher power supply voltage (4.75V to 5.25V). - CD74HCT244: Higher output current capability (±8mA) but operates at a narrower voltage range (4.5V to 5.5V).

These alternative models provide similar functionality and can be chosen based on specific application requirements.

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