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SN74ALVTH16821DL
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SN74ALVTH16821DL

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Logic Level Translator
  • Characteristics: High-speed, low-voltage, 18-bit bus transceiver
  • Package: TSSOP (Thin Shrink Small Outline Package)
  • Essence: Translates signals between different voltage levels in digital systems
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 1.2V to 3.6V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay: 2.5ns (Max)
  • Output Drive Strength: ±12mA
  • ESD Protection: >2000V (Human Body Model)

Detailed Pin Configuration

The SN74ALVTH16821DL has a total of 56 pins, which are divided into various groups:

  • VCCA, VCCB: Power supply pins
  • GND: Ground pin
  • OEAB, OEBA: Output enable pins
  • A1-A9, B1-B9: Data input/output pins
  • DIR: Direction control pin
  • NC: No connection pin

For the detailed pin configuration diagram, please refer to the datasheet provided by the manufacturer.

Functional Features

  • Bidirectional voltage translation between two independent buses
  • Supports mixed-mode signal operation on each port
  • Provides non-inverting level shifting with 3-state outputs
  • Allows voltage level translation from 1.2V to 3.6V

Advantages and Disadvantages

Advantages: - High-speed operation - Low-voltage operation - Wide operating temperature range - ESD protection for enhanced reliability - Compact TSSOP package for space-constrained applications

Disadvantages: - Limited voltage range (1.2V to 3.6V) - Not suitable for applications requiring higher voltage translation

Working Principles

The SN74ALVTH16821DL utilizes a combination of MOSFETs and CMOS technology to achieve bidirectional voltage translation. It employs level shifting techniques to ensure proper signal transfer between two buses operating at different voltage levels. The direction control pin (DIR) determines the direction of data flow, while the output enable pins (OEAB, OEBA) control the tri-state outputs.

Detailed Application Field Plans

The SN74ALVTH16821DL is commonly used in various digital systems where voltage translation is required. Some typical application fields include:

  1. Microcontrollers: Facilitates communication between microcontrollers operating at different voltage levels.
  2. Memory Interfaces: Enables data transfer between memory modules with varying voltage requirements.
  3. Communication Systems: Allows signal conversion between different logic families in communication protocols.
  4. Industrial Automation: Supports voltage translation in industrial control systems for reliable data exchange.

Detailed and Complete Alternative Models

  1. SN74LVC4245A: Octal bus transceiver with voltage level translation capability.
  2. TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing.
  3. PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator.

These alternative models offer similar functionality and can be considered as substitutes for the SN74ALVTH16821DL in specific applications.

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Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi SN74ALVTH16821DL dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of SN74ALVTH16821DL:

  1. Q: What is SN74ALVTH16821DL? A: SN74ALVTH16821DL is a 20-bit universal bus driver with 3-state outputs, designed for low-voltage (1.65V to 3.6V) applications.

  2. Q: What are the key features of SN74ALVTH16821DL? A: Some key features include wide voltage range, 3-state outputs, high-speed operation, and compatibility with various logic families.

  3. Q: What is the maximum operating frequency of SN74ALVTH16821DL? A: The maximum operating frequency of SN74ALVTH16821DL is typically around 400 MHz.

  4. Q: Can SN74ALVTH16821DL be used in both input and output applications? A: Yes, SN74ALVTH16821DL can be used as both an input buffer and an output driver.

  5. Q: What is the purpose of the 3-state outputs in SN74ALVTH16821DL? A: The 3-state outputs allow multiple devices to share a common bus without interfering with each other.

  6. Q: What is the power supply voltage range for SN74ALVTH16821DL? A: SN74ALVTH16821DL operates within a power supply voltage range of 1.65V to 3.6V.

  7. Q: Is SN74ALVTH16821DL compatible with other logic families? A: Yes, SN74ALVTH16821DL is compatible with various logic families such as TTL, CMOS, and LVCMOS.

  8. Q: Can SN74ALVTH16821DL handle bidirectional data flow? A: No, SN74ALVTH16821DL is a unidirectional bus driver and cannot handle bidirectional data flow.

  9. Q: What is the typical output current capability of SN74ALVTH16821DL? A: The typical output current capability of SN74ALVTH16821DL is around 12 mA.

  10. Q: Are there any specific application notes or reference designs available for SN74ALVTH16821DL? A: Yes, Texas Instruments provides application notes and reference designs that can help in implementing SN74ALVTH16821DL in various technical solutions.

Please note that these answers are general and may vary depending on the specific requirements and conditions of your application. It's always recommended to refer to the datasheet and consult with the manufacturer for accurate information.