Digital Electronics - Vol 1 | 5. Logic Families - Part E by Abraham | Learn Smarter
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5. Logic Families - Part E

The chapter discusses various aspects of CMOS technology, including tristate outputs, input protection, and the significance of unused inputs. It covers CMOS subfamilies, such as the 4000 series and the 74C series, detailing their characteristics and advantages. Additionally, the chapter addresses BiCMOS logic and its enhanced features, along with the challenges presented by latch-up conditions in CMOS devices.

Sections

  • 5.5.1.11

    Cmos With Tristate Outputs

    This section discusses the operation and characteristics of CMOS devices with tristate outputs, emphasizing their similarities to TTL devices in terms of functionality.

    Learning Practice

  • 5.5.1.12

    Floating Or Unused Inputs

    This section discusses the importance of properly handling unused inputs in CMOS devices to prevent noise and static charge accumulation.

    Learning Practice

  • 5.5.1.13

    Input Protection

    This section details the importance and methods of protecting CMOS device inputs from static charge build-up.

    Learning Practice

  • 5.5.1.14

    Latch-Up Condition

    The latch-up condition in CMOS devices is an undesirable state caused by parasitic transistors, leading to significant current flow and potential device destruction.

    Learning Practice

  • 5.5.2

    Cmos Subfamilies

    This section provides an overview of various subfamilies of CMOS logic, detailing the characteristics and applications of different series.

    Learning Practice

  • 5.5.2.1

    4000-Series

    The 4000-series refers to early CMOS integrated circuits that are still foundational in digital electronics, focusing on their evolution and features.

    Learning Practice

  • 5.5.2.2

    74c Series

    The 74C CMOS subfamily offers pin-to-pin replacements for TTL logic functions, maintaining similar characteristic parameters to the 4000-series devices.

    Learning Practice

  • 5.5.2.3

    74hc/hct Series

    The 74HC/HCT series represents high-speed CMOS logic functions compatible with TTL, offering enhanced performance.

    Learning Practice

  • 5.5.2.4

    74ac/act Series

    The 74AC/ACT series represents the fastest CMOS logic family combining high speed, low power consumption, and high output drive capability, with the ACT series being a variant featuring TTL-compatible inputs.

    Learning Practice

  • 5.6

    Bicmos Logic

    BiCMOS logic combines bipolar and CMOS devices to enhance speed and performance while maintaining lower power consumption.

    Learning Practice

  • 5.6.1

    Bicmos Inverter

    This section discusses the structure and operation of the BiCMOS inverter, highlighting its MOSFET components and output states.

    Learning Practice

  • 5.7

    Nmos And Pmos Logic

    This section introduces NMOS and PMOS logic families, highlighting their application in large-scale integration and comparing their features.

    Learning Practice

References

chapter 5 part E.pdf

Class Notes

Memorization

What we have learnt

  • Tristate CMOS devices funct...
  • Unused CMOS inputs should b...
  • BiCMOS logic combines the b...

Final Test

Revision Tests