74LCXH2245MSA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-speed, low-voltage, bidirectional communication
• Package: Surface Mount Technology (SMT), 48-pin TSSOP package
• Essence: Provides voltage level shifting and bus transceiver functionality in a single IC
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 1.65V to 3.6V
• Logic Family: LCX
• Number of Channels: 8
• Input/Output Compatibility: 5V tolerant
• Propagation Delay: 2.5ns (max)
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The 74LCXH2245MSA has a total of 48 pins, which are organized as follows:

• Pins 1-8: Channel A Data Inputs/Outputs (D1-D8)
• Pins 9-16: Channel B Data Inputs/Outputs (D9-D16)
• Pins 17-24: Channel A Enable Inputs (OE1-OE8)
• Pins 25-32: Channel B Enable Inputs (OE9-OE16)
• Pins 33-40: VCC and GND (Power Supply)
• Pins 41-48: Channel Direction Control Inputs (DIR1-DIR8)

Functional Features

• Bidirectional voltage level shifting between two different voltage domains
• Simultaneous data transmission in both directions
• Automatic direction control based on DIR inputs
• 5V tolerance on input/output pins allows interfacing with higher voltage systems
• Low power consumption and high-speed operation
• ESD protection on all pins

Advantages and Disadvantages

Advantages

• Integration of level shifting and bus transceiver functionality reduces component count and board space
• High-speed operation enables efficient data transfer in time-critical applications
• 5V tolerance allows compatibility with legacy systems
• ESD protection ensures robustness against electrostatic discharge events

Disadvantages

• Limited to a maximum supply voltage of 3.6V, which may not be suitable for certain applications requiring higher voltages
• Propagation delay of 2.5ns (max) may introduce timing constraints in high-frequency designs

Working Principles

The 74LCXH2245MSA operates by utilizing a combination of CMOS technology and level shifting techniques. It provides bidirectional communication between two voltage domains, allowing seamless data transfer. The direction of data flow is controlled by the DIR inputs, enabling simultaneous transmission in both directions. The IC's low power consumption and high-speed operation make it suitable for various applications.

Detailed Application Field Plans

The 74LCXH2245MSA finds application in numerous fields, including:

1. Embedded Systems: Used for interfacing microcontrollers with different voltage peripherals.
2. Communication Systems: Facilitates level shifting and signal translation in communication protocols such as UART, SPI, and I2C.
3. Industrial Automation: Enables communication between devices operating at different voltage levels in industrial control systems.
4. Automotive Electronics: Provides voltage level shifting in automotive applications where multiple voltage domains exist.
5. Consumer Electronics: Utilized in devices that require bidirectional communication between different voltage components, such as smartphones and tablets.

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar functionality with a different package (20-pin SSOP)
2. MC74LVX245: Comparable features in a DIP package (20-pin DIP)
3. 74HCT245: Alternative option with higher supply voltage tolerance (4.5V to 5.5V)

These alternative models offer similar level shifting and bus transceiver capabilities, providing flexibility in choosing the most suitable IC for specific applications.

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