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SN74LS90NSR
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SN74LS90NSR

Product Overview

Category

SN74LS90NSR belongs to the category of integrated circuits (ICs).

Use

It is commonly used as a decade counter/divider in various electronic applications.

Characteristics

  • Low-power Schottky technology
  • High-speed operation
  • Wide supply voltage range
  • TTL compatible inputs
  • Output capability: 10 LSTTL loads

Package

SN74LS90NSR is available in a small-outline package (SOIC) with 14 pins.

Essence

The essence of SN74LS90NSR lies in its ability to count and divide input pulses by 10.

Packaging/Quantity

SN74LS90NSR is typically packaged in reels, with each reel containing 2500 units.

Specifications

  • Supply voltage: 4.75V to 5.25V
  • Operating temperature range: -40°C to +85°C
  • Maximum clock frequency: 42 MHz
  • Propagation delay time: 15 ns
  • Power dissipation: 500 mW

Detailed Pin Configuration

  1. CLK (Clock Input)
  2. GND (Ground)
  3. QD (Decade Counter Output)
  4. QA (Counter Output A)
  5. QB (Counter Output B)
  6. QC (Counter Output C)
  7. RCO (Ripple Carry Output)
  8. VCC (Positive Power Supply)
  9. QD (Decade Counter Output)
  10. QA (Counter Output A)
  11. QB (Counter Output B)
  12. QC (Counter Output C)
  13. RCO (Ripple Carry Output)
  14. GND (Ground)

Functional Features

  • Decade counting/dividing functionality
  • Ripple carry output for cascading multiple counters
  • Clear input for resetting the counter
  • Clock enable/disable feature

Advantages and Disadvantages

Advantages

  • Low power consumption
  • High-speed operation
  • Wide supply voltage range allows for flexibility in different applications
  • TTL compatible inputs make it easy to interface with other logic circuits

Disadvantages

  • Limited output capability (10 LSTTL loads)
  • Propagation delay time may affect timing-sensitive applications

Working Principles

SN74LS90NSR operates as a synchronous decade counter/divider. It counts input clock pulses and divides them by 10, providing outputs for each decimal digit (QA, QB, QC, QD). The ripple carry output (RCO) can be used to cascade multiple counters for higher counting ranges.

Detailed Application Field Plans

SN74LS90NSR finds applications in various fields, including: 1. Digital frequency division 2. Timekeeping circuits 3. Frequency synthesizers 4. Industrial automation 5. Communication systems

Detailed and Complete Alternative Models

  1. CD4017BE: Decade counter/divider IC with similar functionality.
  2. MC14017BCL: CMOS counter/divider IC with 10 decoded outputs.
  3. HEF4017BP: Johnson counter/divider IC with 10 decoded outputs.

These alternative models offer similar features and can be used as substitutes for SN74LS90NSR in different applications.

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Καταγράψτε 10 συνήθεις ερωτήσεις και απαντήσεις που σχετίζονται με την εφαρμογή του SN74LS90NSR σε τεχνικές λύσεις

Sure! Here are 10 common questions and answers related to the application of SN74LS90NSR:

  1. Q: What is SN74LS90NSR? A: SN74LS90NSR is a decade counter/divider integrated circuit (IC) that can be used in various technical solutions.

  2. Q: What is the purpose of SN74LS90NSR? A: The purpose of SN74LS90NSR is to count and divide input clock pulses, making it useful for applications such as frequency division, timekeeping, and sequential logic circuits.

  3. Q: What is the maximum clock frequency supported by SN74LS90NSR? A: SN74LS90NSR can support clock frequencies up to 25 MHz.

  4. Q: How many outputs does SN74LS90NSR have? A: SN74LS90NSR has four outputs, each representing a different binary value from 0 to 9.

  5. Q: Can SN74LS90NSR be cascaded to count beyond 9? A: Yes, SN74LS90NSR can be cascaded with other counters to count beyond 9 and create larger counting sequences.

  6. Q: What is the power supply voltage range for SN74LS90NSR? A: SN74LS90NSR operates on a power supply voltage range of 4.75V to 5.25V.

  7. Q: Does SN74LS90NSR have any built-in error detection or correction features? A: No, SN74LS90NSR does not have any built-in error detection or correction features.

  8. Q: Can SN74LS90NSR be used in both digital and analog circuits? A: SN74LS90NSR is primarily designed for digital circuits, but it can be used in conjunction with other components to interface with analog signals.

  9. Q: What is the typical power consumption of SN74LS90NSR? A: The typical power consumption of SN74LS90NSR is around 10mW.

  10. Q: Are there any specific precautions to consider when using SN74LS90NSR? A: It is important to ensure proper decoupling and bypass capacitors are used near the power supply pins of SN74LS90NSR to minimize noise and voltage fluctuations.

Please note that these answers are general and may vary depending on the specific application and circuit design.