Encyclopedia Entry: 74ALVC2245WMX

Product Information Overview

• Category: Integrated Circuit (IC)
• Use: Signal Level Shifter
• Characteristics: Bi-directional, Octal Bus Transceiver
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: High-speed, low-power CMOS technology
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 1.2V to 3.6V
• Input/Output Voltage Levels: 1.8V to 3.3V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 4.5ns (max) at 3.3V supply voltage
• Output Drive Capability: ±24mA

Detailed Pin Configuration

The 74ALVC2245WMX IC has a total of 20 pins, which are assigned as follows:

• Pins 1 to 10: A1 to A8 (Data Input/Output for Port A)
• Pins 11 to 20: B1 to B8 (Data Input/Output for Port B)

Functional Features

• Bi-directional data transfer between Port A and Port B
• Automatic direction control based on the direction pin (DIR)
• Output enable control pin (OE) for disabling the outputs
• Schmitt-trigger inputs for noise immunity
• 3-state outputs for bus-oriented applications

Advantages and Disadvantages

Advantages: - High-speed operation suitable for fast data transmission - Low power consumption for energy-efficient designs - Wide operating voltage range allows compatibility with various systems - Noise immunity due to Schmitt-trigger inputs - Flexible control options with DIR and OE pins

Disadvantages: - Limited output drive capability compared to some other ICs - Not suitable for high-voltage applications

Working Principles

The 74ALVC2245WMX is an octal bus transceiver that allows bidirectional data transfer between two ports, A and B. The direction of data flow is controlled by the DIR pin. When DIR is set to logic low, data flows from Port A to Port B, and when DIR is set to logic high, data flows from Port B to Port A.

The OE pin is used to enable or disable the outputs. When OE is set to logic high, the outputs are disabled, effectively isolating the IC from the bus.

The inputs of the IC feature Schmitt-trigger characteristics, providing noise immunity and ensuring reliable operation even in noisy environments.

Detailed Application Field Plans

The 74ALVC2245WMX is commonly used in various applications where bidirectional level shifting is required. Some typical application fields include:

1. Microcontroller Interfacing: The IC can be used to interface microcontrollers operating at different voltage levels, allowing seamless communication between them.
2. Memory Interfaces: It can be employed in memory modules to facilitate data transfer between different memory devices operating at varying voltage levels.
3. Bus Communication Systems: The IC finds applications in bus-oriented systems, such as I2C, SPI, or UART, where multiple devices need to communicate with each other using a common bus.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74ALVC2245WMX are:

1. SN74LVC245A: Octal Bus Transceiver with 3-State Outputs
2. MC74LVX245: Low Voltage CMOS Octal Bus Transceiver
3. CD74HCT245: High-Speed CMOS Logic Octal Bus Transceiver

These alternatives may have slightly different specifications and pin configurations but serve the same purpose of bidirectional level shifting.

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