DM74S244N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Buffer/Line Driver
• Characteristics: High-speed, Non-Inverting, Tri-State
• Package: DIP (Dual In-line Package)
• Essence: Logic Gate
• Packaging/Quantity: Tube, 25 pieces per tube

Specifications

• Supply Voltage: 4.75V to 5.25V
• Input Voltage: 0V to Vcc
• Output Voltage: 0V to Vcc
• Operating Temperature: -40°C to +85°C
• Propagation Delay Time: 10ns (typical)
• Output Current: ±24mA

Detailed Pin Configuration

The DM74S244N IC has a total of 20 pins arranged in a dual in-line package. The pin configuration is as follows:

__ __ A1 -| 01 20 |- Vcc B1 -| 02 19 |- A2 C1 -| 03 18 |- B2 D1 -| 04 17 |- C2 D2 -| 05 16 |- D2 GND -| 06 15 |- GND D3 -| 07 14 |- D3 C3 -| 08 13 |- D4 B3 -| 09 12 |- C4 A3 -| 10 11 |- B4 ¯¯ ¯¯

Functional Features

The DM74S244N is a high-speed non-inverting buffer and line driver IC. It features tri-state outputs, which allow the device to be effectively disconnected from the bus when not in use. This feature enables multiple devices to share the same bus without interfering with each other's operation.

Advantages and Disadvantages

Advantages: - High-speed operation - Non-inverting buffer - Tri-state outputs for bus sharing

Disadvantages: - Requires external pull-up resistors for proper operation - Limited output current capacity

Working Principles

The DM74S244N operates by receiving input signals and amplifying them to provide high-speed, non-inverted output signals. The tri-state outputs allow the device to be effectively disconnected from the bus when the enable pin is set to a specific state, preventing interference with other devices connected to the same bus.

Detailed Application Field Plans

The DM74S244N is commonly used in various applications, including:

1. Data communication systems: It can be used as a line driver to amplify and transmit digital signals over long distances.
2. Microprocessor interfacing: It acts as a buffer between the microprocessor and other peripheral devices, ensuring signal integrity and preventing data corruption.
3. Memory systems: It helps in driving address and data lines in memory modules, ensuring reliable and efficient data transfer.

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to the DM74S244N are:

1. SN74LS244N: Low-power Schottky version of the IC.
2. MC74HC244AN: High-speed CMOS version of the IC.
3. CD74HCT244E: High-speed CMOS version with TTL-compatible inputs.

These alternative models offer similar functionality but may have different characteristics and specifications.

In conclusion, the DM74S244N is a high-speed non-inverting buffer and line driver IC with tri-state outputs. It finds applications in data communication systems, microprocessor interfacing, and memory systems. While it has advantages such as high-speed operation and tri-state outputs, it requires external pull-up resistors and has limited output current capacity. Alternative models such as SN74LS244N, MC74HC244AN, and CD74HCT244E provide similar functionality with slight variations in characteristics and specifications.