Encyclopedia Entry: 74ALVC245BQ,115

Product Information Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifting and Bus Transceiver
• Characteristics: High-Speed, Low-Power, Bidirectional Data Transfer
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Voltage-Level Translation and Signal Conditioning
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Logic Family: ALVC (Advanced Low-Voltage CMOS)
• Number of Channels: 8
• Supply Voltage Range: 1.2V to 3.6V
• Input Voltage Levels: Compatible with both 3.3V and 5V systems
• Output Voltage Levels: Compatible with both 3.3V and 5V systems
• Propagation Delay: 4.5 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74ALVC245BQ,115 IC has a total of 20 pins, which are assigned as follows:

• Pins 1 to 8: Channel A Data Inputs/Outputs (A1 to A8)
• Pins 9 to 16: Channel B Data Inputs/Outputs (B1 to B8)
• Pin 17: Output Enable (OE)
• Pin 18: Direction Control (DIR)
• Pin 19: Ground (GND)
• Pin 20: Supply Voltage (VCC)

Functional Features

• Bidirectional Data Transfer: Allows data transmission in both directions.
• Voltage-Level Translation: Enables interfacing between systems operating at different voltage levels.
• Automatic Direction Control: Simplifies the control of data flow by automatically switching the direction based on the DIR pin.
• Output Enable Function: Allows the user to disable the outputs when not required, reducing power consumption.

Advantages and Disadvantages

Advantages: - High-Speed Operation: Provides fast data transfer with a propagation delay of only 4.5 ns. - Low Power Consumption: Operates at low supply voltages, resulting in reduced power consumption. - Wide Compatibility: Compatible with both 3.3V and 5V systems, enhancing versatility.

Disadvantages: - Limited Channel Count: The IC supports up to 8 channels, which may be insufficient for certain applications requiring more channels. - Temperature Limitations: The operating temperature range is limited to -40°C to +85°C, which may restrict usage in extreme environments.

Working Principles

The 74ALVC245BQ,115 is based on Advanced Low-Voltage CMOS technology, which allows it to operate at low supply voltages while maintaining high-speed performance. It utilizes a combination of transistors and logic gates to achieve bidirectional data transfer and voltage-level translation. The DIR pin controls the direction of data flow, while the OE pin enables or disables the outputs as needed.

Detailed Application Field Plans

The 74ALVC245BQ,115 finds application in various fields, including:

1. Microcontroller Interfacing: Facilitates communication between microcontrollers operating at different voltage levels.
2. Data Acquisition Systems: Enables level shifting and signal conditioning in data acquisition circuits.
3. Industrial Automation: Used in industrial control systems for interfacing between different subsystems.
4. Communication Interfaces: Provides voltage-level translation in serial communication interfaces like UART, SPI, and I2C.
5. Automotive Electronics: Supports voltage compatibility between different automotive electronic modules.

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar functionality with a wider operating temperature range (-55°C to +125°C).
2. 74HC245: Compatible with 5V systems only, not suitable for 3.3V applications.
3. CD74HCT245: High-speed operation with TTL compatibility but requires a 5V supply voltage.

(Note: The above list is not exhaustive and serves as an example of alternative models.)

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