74LCX245WMX

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Shifter
• Characteristics: Low Voltage, High-Speed CMOS Technology
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Bi-directional Voltage Translator
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 1.65V to 3.6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Input Current: ±50mA
• Maximum Output Current: ±50mA
• Propagation Delay: 2.5ns (Max) at 3.3V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74LCX245WMX has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) - Active Low Output Enable
2. A1 - Data Input/Output for Port A
3. B1 - Data Input/Output for Port B
4. A2 - Data Input/Output for Port A
5. B2 - Data Input/Output for Port B
6. A3 - Data Input/Output for Port A
7. B3 - Data Input/Output for Port B
8. GND - Ground
9. B4 - Data Input/Output for Port B
10. A4 - Data Input/Output for Port A
11. B5 - Data Input/Output for Port B
12. A5 - Data Input/Output for Port A
13. B6 - Data Input/Output for Port B
14. A6 - Data Input/Output for Port A
15. B7 - Data Input/Output for Port B
16. A7 - Data Input/Output for Port A
17. VCC - Supply Voltage
18. DIR (Direction Control) - Bi-directional Data Flow Control
19. GND - Ground
20. OE (Output Enable) - Active Low Output Enable

Functional Features

The 74LCX245WMX is a bi-directional voltage translator designed to work with low voltage systems. It allows for the translation of signals between different voltage levels, making it suitable for interfacing between devices operating at different voltage levels.

The device features eight bidirectional I/O ports, which can be independently controlled using the direction control pin (DIR). The output enable pin (OE) allows for enabling or disabling the outputs.

The 74LCX245WMX operates on a supply voltage range of 1.65V to 3.6V, making it compatible with various low voltage systems. It utilizes high-speed CMOS technology, providing fast propagation delays and low power consumption.

Advantages and Disadvantages

Advantages: - Bi-directional voltage translation capability - Wide supply voltage range - High-speed operation - Low power consumption - Compact SOIC package

Disadvantages: - Limited maximum input/output current - Not suitable for high voltage applications

Working Principles

The 74LCX245WMX uses a combination of MOSFETs and CMOS logic to achieve bi-directional voltage translation. The direction control pin (DIR) determines the data flow direction, while the output enable pin (OE) enables or disables the outputs.

When the DIR pin is set to a specific logic level, the corresponding data inputs/outputs (A1-A7, B1-B7) are connected to the appropriate internal circuitry, allowing for bidirectional data transfer between the two voltage domains.

Detailed Application Field Plans

The 74LCX245WMX is commonly used in various applications where voltage level translation is required. Some of the typical application fields include:

1. Microcontroller interfacing with different voltage peripherals
2. Communication systems involving multiple voltage domains
3. Battery-powered devices with low voltage requirements
4. Sensor interfaces requiring voltage level conversion
5. Industrial automation systems with mixed voltage components

Detailed and Complete Alternative Models

1. SN74LVC245A: Bi-directional Voltage-Level Translator with 3-State Outputs
2. TXB0108: 8-Bit Bidirectional Voltage-Level Translator with Automatic Direction Sensing

These alternative models offer similar functionality to the 74LCX245WMX and can be considered as alternatives based on specific application requirements.

In conclusion, the 74LCX245WMX is a versatile logic level shifter that provides bi-directional voltage translation between different voltage domains. Its low voltage operation, high-speed performance, and compact package make it suitable for a wide range of applications. However, it has limitations in terms of maximum current handling and is not suitable for high voltage applications.