74HCT540D
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Toshiba Semiconductor and Storage 74HCT540D

Manufacturer No:
74HCT540D
Manufacturer:
Toshiba Semiconductor and Storage
Package:
Tape & Reel (TR)
Description:
IC BUFFER INVERT 5.5V 20SOIC
Delivery:
Payment:
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Product Introduction

Overview

The 74HCT540D is a high-speed CMOS octal bus buffer integrated circuit manufactured by Toshiba Semiconductor and Storage. This device is fabricated using silicon gate C2MOS technology and is designed to provide high-speed operation while maintaining low power dissipation. The 74HCT540D is an inverting type, meaning it inverts the input signal at the output, and it features 3-state outputs. This makes it suitable for a variety of applications, including level conversion between TTL, NMOS, and CMOS logic levels.

Key Specifications

Characteristic Symbol Min Typ Max Unit Conditions
Supply Voltage VCC -0.5 7.0 V
Input Voltage VIN -0.5 VCC + 0.5 V
Output Voltage VOUT -0.5 VCC + 0.5 V
Propagation Delay Time tPLH, tPHL 9 17 ns VCC = 5.5 V, CL = 50 pF
Input Leakage Current IIN ±1 µA VIN = 0.5 V or 2.4 V
Quiescent Supply Current ICC 4.0 µA Ta = 25 °C
Operating Temperature Range Topr -40 125 °C

Key Features

  • Wide Operating Temperature Range: -40°C to 125°C
  • High Speed Operation: Propagation delay time (tpd) of 9 ns (typ.) at VCC = 5.5 V
  • Low Power Dissipation: Quiescent supply current (ICC) of 4.0 µA (max) at Ta = 25°C
  • Compatibility with TTL Outputs: High-level input voltage (VIH) of 2.0 V (min) and low-level input voltage (VIL) of 0.8 V (max)
  • Wide Interfacing Ability: Compatible with LSTTL, NMOS, and CMOS logic levels
  • 3-State Outputs: Outputs can be set to high-impedance state when either G1 or G2 is high
  • Balanced Propagation Delays: tPLH ≈ tPHL
  • Static Discharge Protection: All inputs are equipped with protection circuits against static discharge or transient excess voltage

Applications

  • Level Conversion: Can be used as a level converter for interfacing TTL or NMOS to High Speed CMOS
  • Buffering and Line Driving: Suitable for buffering and driving signals in digital circuits
  • High-Speed Digital Systems: Ideal for high-speed digital systems requiring low power consumption and high reliability
  • Mixed Logic Systems: Useful in systems that require compatibility with multiple logic families (LSTTL, NMOS, CMOS)

Q & A

  1. What is the primary function of the 74HCT540D?

    The primary function of the 74HCT540D is to act as an octal bus buffer with inverting 3-state outputs, allowing it to buffer and invert digital signals.

  2. What is the operating temperature range of the 74HCT540D?

    The operating temperature range of the 74HCT540D is -40°C to 125°C.

  3. What is the typical propagation delay time of the 74HCT540D?

    The typical propagation delay time (tpd) of the 74HCT540D is 9 ns at VCC = 5.5 V.

  4. Is the 74HCT540D compatible with TTL outputs?

    Yes, the 74HCT540D is compatible with TTL outputs, with high-level input voltage (VIH) of 2.0 V (min) and low-level input voltage (VIL) of 0.8 V (max).

  5. What type of protection does the 74HCT540D have against static discharge?

    The 74HCT540D has protection circuits against static discharge or transient excess voltage on all inputs.

  6. How do the 3-state outputs of the 74HCT540D work?

    The outputs of the 74HCT540D can be set to a high-impedance state when either G1 or G2 is high.

  7. What is the quiescent supply current of the 74HCT540D?

    The quiescent supply current (ICC) of the 74HCT540D is 4.0 µA (max) at Ta = 25°C.

  8. In what package is the 74HCT540D available?

    The 74HCT540D is available in a SOIC20 package.

  9. Can the 74HCT540D be used in mixed logic systems?

    Yes, the 74HCT540D can be used in mixed logic systems due to its compatibility with LSTTL, NMOS, and CMOS logic levels.

  10. What is the significance of balanced propagation delays in the 74HCT540D?

    The balanced propagation delays (tPLH ≈ tPHL) ensure that the rise and fall times of the output signals are approximately equal, which is important for maintaining signal integrity in high-speed digital systems.

Product Attributes

Logic Type:Buffer, Inverting
Number of Elements:1
Number of Bits per Element:8
Input Type:- 
Output Type:3-State
Current - Output High, Low:6mA, 6mA
Voltage - Supply:4.5V ~ 5.5V
Operating Temperature:-40°C ~ 85°C (TA)
Mounting Type:Surface Mount
Package / Case:20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:20-SOIC
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Similar Products

Part Number 74HCT540D 74HCT541D
Manufacturer Toshiba Semiconductor and Storage Toshiba Semiconductor and Storage
Product Status Active Active
Logic Type Buffer, Inverting Buffer, Non-Inverting
Number of Elements 1 1
Number of Bits per Element 8 8
Input Type - -
Output Type 3-State 3-State
Current - Output High, Low 6mA, 6mA 6mA, 6mA
Voltage - Supply 4.5V ~ 5.5V 4.5V ~ 5.5V
Operating Temperature -40°C ~ 85°C (TA) -40°C ~ 85°C (TA)
Mounting Type Surface Mount Surface Mount
Package / Case 20-SOIC (0.295", 7.50mm Width) 20-SOIC (0.295", 7.50mm Width)
Supplier Device Package 20-SOIC 20-SOIC

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