74LCX2244MSA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: Low Voltage, High-Speed, Bidirectional
• Package: Surface Mount
• Essence: Translates logic levels between different voltage domains
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 1.65V to 3.6V
• Logic Voltage Levels: 1.8V, 2.5V, 3.3V
• Number of Channels: 8
• Input/Output Type: Tri-State
• Propagation Delay: 2.5ns (Max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74LCX2244MSA has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. A1 (Channel Select) 1
3. I/O1 (Bidirectional Data) 1
4. GND (Ground)
5. I/O2 (Bidirectional Data) 2
6. A2 (Channel Select) 2
7. OE (Output Enable) 2
8. VCC (Supply Voltage)
9. I/O3 (Bidirectional Data) 3
10. A3 (Channel Select) 3
11. I/O4 (Bidirectional Data) 4
12. A4 (Channel Select) 4
13. I/O5 (Bidirectional Data) 5
14. A5 (Channel Select) 5
15. I/O6 (Bidirectional Data) 6
16. A6 (Channel Select) 6
17. I/O7 (Bidirectional Data) 7
18. A7 (Channel Select) 7
19. I/O8 (Bidirectional Data) 8
20. A8 (Channel Select) 8

Functional Features

• Bidirectional voltage level translation between different logic levels
• Enables communication between devices operating at different voltage domains
• Tri-state outputs allow for easy interfacing with other components
• Low power consumption and high-speed operation
• Supports multiple logic voltage levels (1.8V, 2.5V, 3.3V)

Advantages and Disadvantages

Advantages

• Wide supply voltage range allows compatibility with various systems
• High-speed operation enables efficient data transfer
• Bidirectional capability simplifies circuit design
• Tri-state outputs provide flexibility in connecting to other components

Disadvantages

• Limited number of channels (8)
• Not suitable for applications requiring translation between more than three voltage domains
• Propagation delay may impact timing-sensitive applications

Working Principles

The 74LCX2244MSA is a bidirectional logic level translator that operates by utilizing a combination of MOSFETs and CMOS technology. It translates logic signals between different voltage domains, allowing devices operating at different voltage levels to communicate with each other.

The device uses channel select pins (A1-A8) to determine the direction of translation for each channel. When the output enable (OE) pin is active, the bidirectional data lines (I/O1-I/O8) are connected to the corresponding input/output pins, enabling data transfer. When the OE pin is inactive, the outputs are tri-stated, effectively disconnecting the device from the bus.

Detailed Application Field Plans

The 74LCX2244MSA is commonly used in various applications where logic level translation is required. Some of the typical application fields include:

1. Microcontroller interfacing with different voltage peripherals
2. Communication interfaces between systems operating at different logic levels
3. Mixed-voltage level circuit designs
4. Battery-powered devices requiring low power consumption

Detailed and Complete Alternative Models

• 74LVC2244A: Similar functionality, but operates at a higher supply voltage range (1.65V to 5.5V)
• SN74LVC244A: Octal buffer/line driver with similar voltage translation capabilities
• TXB0108: Bidirectional voltage-level translator with automatic direction sensing

These alternative models offer similar features and can be considered as substitutes for the 74LCX2244MSA depending on specific requirements and system constraints.

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