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Contents

Digital Electronics

Number Systems

Binary Number System Octal Number System Hexadecimal Number System Number System Conversions Binary Addition Binary Subtraction 1s Complement 2s Complement Signed Number Representation BCD Code Gray Code Excess-3 Code ASCII Code Error Detection Codes Hamming Code

Logic Gates

AND Gate OR Gate NOT Gate NAND Gate NOR Gate XOR Gate XNOR Gate Universal Gates NAND Universal Gates NOR Multi-Input Gates Buffer Gate TTL Logic Family CMOS Logic Family TTL vs CMOS Comparison Logic Level Interfacing

Boolean Algebra

Boolean Algebra Axioms Boolean Algebra Theorems De Morgan Theorem 1 De Morgan Theorem 2 De Morgan Applications Boolean Expression Simplification Canonical SOP Form Canonical POS Form Minterm and Maxterm Relationship K-Map 2 Variable K-Map 3 Variable K-Map 4 Variable K-Map Don't Care Conditions K-Map POS Simplification Quine-McCluskey Method Prime Implicant Chart

Combinational Circuits

Sequential Circuits

Memory & PLDs

ROM Architecture PROM EPROM and EEPROM SRAM DRAM SRAM vs DRAM Flash Memory PLA PAL CPLD FPGA Architecture FPGA vs ASIC

Digital System Design

Propagation Delay Setup and Hold Time Static Hazards Dynamic Hazards Glitches and Races Synchronous Design Principles Clock Skew and Jitter Asynchronous Circuit Design

Other Topics

Other Subjects

Analog Electronics Signals & Systems Control Systems Electromagnetic Theory Digital Communication Analog Communication Network Analysis Microprocessors VLSI Design Verilog HDL Power Electronics Embedded Systems DSP Electronic Devices

Section Progress100%

15 of 15 articles

Logic Level Interfacing

TTL to CMOS, CMOS to TTL level shifting.

Updated: 19 March 2026

4 min read

Logic Level Interfacing

Test your ability to correctly interface TTL and CMOS devices without level-shifting errors.

Question 1 of 3

Q1.A standard TTL output (VOH min = 2.4V) drives a 5V CMOS input (VIH min = 3.5V). Without any interface circuit, this connection is:

Related Articles

TTL Logic Family

Transistor-transistor logic, voltage levels, fan-out, speed.

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CMOS Logic Family

Complementary MOS, low power, high noise margin.

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OR Gate

Two input OR, truth table, Boolean expression Y=A+B, IC 7432.

5 min read

AND Gate

Two input AND, truth table, Boolean expression Y=AB, IC 7408.

12 min read

Multi-Input Gates

3-input, 4-input gates, cascading for more inputs.

9 min read

TTL vs CMOS Comparison

Boolean Algebra Axioms