DM74AS640WMX

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Converter
• Characteristics: High-speed, Non-Inverting, Octal Bus Transceiver
• Package: 20-pin Wide SOIC (Small Outline Integrated Circuit)
• Essence: Converts logic levels between different voltage domains
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Logic Family: Advanced Schottky TTL (Transistor-Transistor Logic)
• Supply Voltage: 4.5V to 5.5V
• Input Voltage Levels: 0V to 0.8V (Low), 2V to VCC+0.5V (High)
• Output Voltage Levels: 0V to 0.5V (Low), 2.7V to VCC (High)
• Propagation Delay: 6ns (Max)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The DM74AS640WMX has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. A1 (Data Input) 1
3. B1 (Data Input) 1
4. GND (Ground)
5. B2 (Data Input) 2
6. A2 (Data Input) 2
7. OE (Output Enable) 2
8. Y1 (Data Output) 1
9. Y2 (Data Output) 2
10. VCC (Supply Voltage)
11. Y3 (Data Output) 3
12. Y4 (Data Output) 4
13. OE (Output Enable) 3
14. A3 (Data Input) 3
15. B3 (Data Input) 3
16. GND (Ground)
17. B4 (Data Input) 4
18. A4 (Data Input) 4
19. OE (Output Enable) 4
20. Y5 (Data Output) 5

Functional Features

• Non-inverting octal bus transceiver with 3-state outputs
• Converts logic levels between different voltage domains
• High-speed operation with minimal propagation delay
• Enables bidirectional data flow between two systems operating at different voltage levels
• Output enable pins allow individual control of each output

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data transfer - Non-inverting nature preserves signal integrity - 3-state outputs provide flexibility in controlling data flow - Wide supply voltage range allows compatibility with various systems

Disadvantages: - Limited to 8-bit data transmission - Requires careful consideration of voltage level compatibility

Working Principles

The DM74AS640WMX is a logic level converter that facilitates communication between systems operating at different voltage levels. It uses advanced Schottky TTL technology to achieve high-speed operation. The non-inverting nature of the device ensures that the input signal is preserved without any inversion.

The IC features 3-state outputs, which means that the outputs can be put into a high-impedance state, allowing multiple devices to share a common bus without interfering with each other. The output enable pins provide individual control over each output, enabling selective data flow.

Detailed Application Field Plans

The DM74AS640WMX finds applications in various fields where logic level conversion is required. Some of the potential application areas include:

1. Microcontroller interfacing with different voltage peripherals
2. Communication interfaces between different logic families
3. Level shifting in mixed-voltage systems
4. Bus communication between systems operating at different voltage domains
5. Signal conditioning in industrial automation

Detailed and Complete Alternative Models

1. SN74LVC8T245PW: 8-bit Logic Level Shifter with 3-state Outputs
2. CD4504BM96: Hex Voltage Level Shifter for TTL-to-CMOS/CMOS-to-TTL Conversion
3. TXB0108PWR: 8-bit Bidirectional Voltage-Level Translator with Automatic Direction Sensing

These alternative models offer similar functionality and can be considered as alternatives to the DM74AS640WMX based on specific requirements.

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