MC74LCX245DTR2

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Shifter
• Characteristics: High-speed, low-voltage, bidirectional level shifting
• Package: TSSOP-20
• Essence: This IC is designed to shift logic levels between different voltage domains in electronic circuits.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage: 1.65V to 5.5V
• Logic Voltage Levels: 1.8V, 2.5V, 3.3V, and 5V
• Number of Channels: 8
• Input/Output Type: Bidirectional
• Propagation Delay: 4.5ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MC74LCX245DTR2 has a total of 20 pins, which are assigned as follows:

1. OE (Output Enable) - Active Low Output Enable
2. I/O0 - Bidirectional Data I/O Channel 0
3. I/O1 - Bidirectional Data I/O Channel 1
4. GND - Ground
5. I/O2 - Bidirectional Data I/O Channel 2
6. I/O3 - Bidirectional Data I/O Channel 3
7. VCC - Positive Power Supply
8. I/O4 - Bidirectional Data I/O Channel 4
9. I/O5 - Bidirectional Data I/O Channel 5
10. I/O6 - Bidirectional Data I/O Channel 6
11. I/O7 - Bidirectional Data I/O Channel 7
12. DIR (Direction Control) - Direction Control Input
13. GND - Ground
14. NC (No Connection) - No Connection
15. A0 - Address Input 0
16. A1 - Address Input 1
17. GND - Ground
18. VCC - Positive Power Supply
19. OE (Output Enable) - Active Low Output Enable
20. DIR (Direction Control) - Direction Control Input

Functional Features

• Bidirectional level shifting between different voltage domains.
• High-speed operation with low propagation delay.
• Wide supply voltage range allows compatibility with various logic families.
• Output enable and direction control inputs for flexible control.

Advantages and Disadvantages

Advantages: - Enables seamless interfacing between circuits operating at different voltage levels. - Fast switching speed minimizes signal distortion. - Compact TSSOP-20 package saves board space. - Wide supply voltage range enhances versatility.

Disadvantages: - Limited to 8 channels, may not be suitable for applications requiring a higher number of channels. - Requires careful consideration of voltage compatibility to avoid damage to connected devices.

Working Principles

The MC74LCX245DTR2 operates by receiving input signals from one voltage domain and shifting them to the desired output voltage level in another domain. The bidirectional nature of the IC allows for data transmission in both directions. The direction control input determines the direction of data flow, while the output enable input enables or disables the outputs.

Detailed Application Field Plans

The MC74LCX245DTR2 finds application in various electronic systems where logic level shifting is required. Some potential application fields include:

1. Microcontroller Interfacing: Facilitating communication between microcontrollers operating at different voltage levels.
2. Sensor Interfaces: Enabling connection between sensors and microcontrollers with varying voltage requirements.
3. Communication Systems: Level shifting between different communication protocols and voltage domains.
4. Data Acquisition Systems: Interfacing analog-to-digital converters (ADCs) with microcontrollers operating at different voltage levels.

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar bidirectional level shifter with 8 channels, available in SOIC-20 package.
2. 74HCT245: Octal bus transceiver with 3-state outputs, compatible with TTL logic levels.
3. CD4504B: Hex non-inverting level shifter with open-drain outputs, suitable for low-voltage applications.

(Note: The above alternative models are provided for reference and may have different specifications and pin configurations. It is recommended to refer to their respective datasheets for detailed information.)

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