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2Resistive networks
3Capacitors and inductors in circuits
4First-order transients
5Second-order RLC circuits
6AC and phasors
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8Filters and frequency response
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Logic families and gates
CMOS versus TTL levels

14. Logic families and gates

CMOS versus TTL levels

In 14. Logic families and gates

Formula

V_{IH,\mathrm{CMOS}}\ne V_{IH,\mathrm{TTL}}

Tags

Digital
Electronics
Logic families and gates
physics
Electronics formula
physics formula
logica

Detail

Computes CMOS versus TTL levels from the circuit model and the stated conditions.

Variables

$V_{OH},V_{OL},V_{IH},V_{IL},V_M$ V
$t_{pHL},t_p$ s
$R_{\mathrm{pu}}$ Ω
fan-out and fan-indimensionless.

Conditions

Logic family on a fixed supply; static levels.

Conventions

V, s or dimensionless

Last reviewed: 2026-09-19

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