ON Semiconductor
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74LCX244SJX
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74LCX244SJX

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: -0.5V to VCC + 0.5V
  • Output Voltage Range: 0V to VCC
  • Maximum Operating Frequency: 200MHz
  • Number of Channels: 8
  • Input/Output Type: Tri-State

Detailed Pin Configuration

The 74LCX244SJX has a total of 20 pins, which are arranged as follows:

__ __ A1 -| 1 20 |- VCC B1 -| 2 19 |- OE# A2 -| 3 18 |- I/O1 B2 -| 4 17 |- I/O2 A3 -| 5 16 |- I/O3 B3 -| 6 15 |- I/O4 A4 -| 7 14 |- GND B4 -| 8 13 |- I/O5 A5 -| 9 12 |- I/O6 B5 -|10 11 |- I/O7 ¯¯ ¯¯

Functional Features

  • Bi-directional voltage translation between two different voltage domains.
  • Supports level shifting from a lower voltage domain to a higher voltage domain and vice versa.
  • Provides eight bidirectional channels for voltage translation.
  • Tri-state outputs allow for easy interfacing with other devices.

Advantages and Disadvantages

Advantages: - Low voltage operation makes it suitable for battery-powered applications. - High-speed CMOS technology enables fast data transmission. - Bi-directional capability simplifies the design of mixed-voltage systems.

Disadvantages: - Limited to a maximum operating frequency of 200MHz. - Not suitable for high-power applications due to its small package size.

Working Principles

The 74LCX244SJX utilizes a combination of MOSFETs and CMOS technology to achieve bi-directional voltage translation. It operates by monitoring the input voltage levels and translating them to the appropriate output voltage levels based on the supply voltage range. The tri-state outputs allow the device to be easily connected to other devices without causing conflicts or bus contention.

Detailed Application Field Plans

The 74LCX244SJX is commonly used in various applications, including:

  1. Microcontroller interfacing with different voltage peripherals.
  2. Level shifting between different logic families (e.g., TTL to CMOS).
  3. Communication interfaces requiring voltage translation (e.g., I2C, SPI).

Detailed and Complete Alternative Models

  1. SN74LVC244A: Similar functionality with a wider supply voltage range (1.65V to 5.5V).
  2. MC74LVX244: Higher maximum operating frequency (250MHz) but limited to a supply voltage range of 2.0V to 3.6V.
  3. 74HCT244: Compatible with TTL logic levels but requires a higher supply voltage (4.5V to 5.5V).

These alternative models offer similar functionality to the 74LCX244SJX but may have different specifications and characteristics that suit specific application requirements.

In conclusion, the 74LCX244SJX is a versatile logic level shifter integrated circuit that provides bi-directional voltage translation between different voltage domains. Its low voltage operation, high-speed CMOS technology, and tri-state outputs make it suitable for various applications in mixed-voltage systems.

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací 74LCX244SJX v technických řešeních

Sure! Here are 10 common questions and answers related to the application of 74LCX244SJX in technical solutions:

  1. Q: What is the 74LCX244SJX?

    • A: The 74LCX244SJX is a high-performance octal buffer/line driver with 3-state outputs, commonly used in digital logic applications.

  2. Q: What is the maximum operating voltage for the 74LCX244SJX?

    • A: The maximum operating voltage for the 74LCX244SJX is typically 3.6V.

  3. Q: How many inputs and outputs does the 74LCX244SJX have?

    • A: The 74LCX244SJX has 8 inputs and 8 outputs.

  4. Q: Can the 74LCX244SJX handle bidirectional data flow?

    • A: No, the 74LCX244SJX is a unidirectional buffer, meaning it can only drive signals from its inputs to its outputs.

  5. Q: What is the purpose of the 3-state outputs on the 74LCX244SJX?

    • A: The 3-state outputs allow the device to be effectively disconnected from the bus, enabling multiple devices to share the same bus without interfering with each other.

  6. Q: What is the typical propagation delay of the 74LCX244SJX?

    • A: The typical propagation delay of the 74LCX244SJX is around 3.5 ns.

  7. Q: Can the 74LCX244SJX operate at high frequencies?

    • A: Yes, the 74LCX244SJX is designed to operate at high frequencies, making it suitable for applications requiring fast signal transmission.

  8. Q: Can the 74LCX244SJX tolerate overvoltage on its inputs?

    • A: No, the 74LCX244SJX is not designed to tolerate overvoltage on its inputs. It is recommended to stay within the specified voltage range.

  9. Q: Is the 74LCX244SJX compatible with both TTL and CMOS logic levels?

    • A: Yes, the 74LCX244SJX is compatible with both TTL and CMOS logic levels, making it versatile for various interfacing applications.

  10. Q: What is the package type of the 74LCX244SJX?

    • A: The 74LCX244SJX is available in a small outline (SO) package, specifically SOIC-20.