74LCX16240MEA

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: Low Voltage, High-Speed, Bidirectional
• Package: 48-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Logic Level Translation between 3.3V and 5V systems
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2.3V to 3.6V
• Input Voltage Range: -0.5V to VCC + 0.5V
• Output Voltage Range: -0.5V to VCC + 0.5V
• Maximum Input Current: ±50mA
• Maximum Output Current: ±50mA
• Propagation Delay: 3.8ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74LCX16240MEA has a total of 48 pins, which are divided into four groups of 12 pins each. The pin configuration is as follows:

Group A: 1. OE (Output Enable) 1 2. Y1 (Output) 1 3. Y2 (Output) 2 4. GND (Ground) 5. Y3 (Output) 3 6. Y4 (Output) 4 7. VCC (Power Supply) 8. Y5 (Output) 5 9. Y6 (Output) 6 10. GND (Ground) 11. Y7 (Output) 7 12. Y8 (Output) 8

Group B, C, and D have similar pin configurations.

Functional Features

• Bidirectional voltage level translation between 3.3V and 5V systems.
• Supports both push-pull and open-drain output configurations.
• Low voltage operation allows for compatibility with modern low-power devices.
• High-speed operation enables efficient data transfer between different voltage domains.
• Output enable pin provides control over the direction of data flow.

Advantages

• Wide supply voltage range allows for flexibility in various applications.
• Fast propagation delay ensures minimal signal distortion during translation.
• Bidirectional capability simplifies circuit design and reduces component count.
• Small package size saves board space and enables compact designs.
• Low power consumption makes it suitable for battery-powered devices.

Disadvantages

• Limited to translating between 3.3V and 5V systems, not compatible with other voltage levels.
• May introduce slight signal degradation due to voltage level shifting.

Working Principles

The 74LCX16240MEA utilizes a combination of MOSFETs and CMOS technology to achieve bidirectional voltage level translation. It employs a voltage divider network and level-shifting circuitry to convert signals between 3.3V and 5V logic levels. The device operates by monitoring the input voltage levels and adjusting the output voltage accordingly, ensuring proper translation between the two voltage domains.

Detailed Application Field Plans

The 74LCX16240MEA is commonly used in various applications that require voltage level translation between 3.3V and 5V systems. Some typical application fields include: - Microcontroller interfacing - Memory modules - Communication interfaces (UART, SPI, I2C) - Sensor networks - Industrial automation - Consumer electronics

Detailed and Complete Alternative Models

• SN74LVC1T45: Single-bit level translator with similar characteristics and package options.
• TXB0108: Eight-channel bidirectional level shifter with automatic direction sensing.
• PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator.

These alternative models offer similar functionality and can be considered as substitutes for the 74LCX16240MEA in specific applications.

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