PCB Design Glossary


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D

Design for Manufacture

Not everything that can be drawn in a cad program can be made in a factory.  Design For Manufacture is a series of checks that ensure that a printed circuit board can be built in a factory.


Digi-Key Electronics Corporation

Digikey is a major North American parts distributor and one of the sponsors of the course.

Visit their website here:  https://digikey.com


E

E-series

Inductors, Resistors, Capacitors, etc... have standard values based largely on the equation

E Series Approximation

where m is an E-Series value m=3\times2^x\;x\in {1,2,3,4,5,6}={6,12,24,48,96,192} and n is a positive integer less than m.

Each order-of-magnitude is logarithmically broken into a set number of values.  For E24 series, those values are 1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2.0, 2.2, 2.4, 2.6, 2.9, 3.2, 3.5, 3.8, 4.2, 4.6, 5.1, 5.6, 6.2, 6.8, 7.5, 8.3, 9.1

\sqrt[24]{10^0}=1.0 \sqrt[24]{10^1}\approx 1.1 \sqrt[24]{10^2}\approx 1.2 \sqrt[24]{10^3}\approx 1.3 \sqrt[24]{10^4}\approx 1.5 \sqrt[25]{10^5}\approx 1.6
\sqrt[25]{10^6}\approx 1.8 \sqrt[25]{10^7}\approx 2.0
1.0 Ω
1.1 Ω 1.2 Ω 1.3 Ω 1.5 Ω 1.6 Ω 1.8 Ω 2.0 Ω
10 Ω 11 Ω 12 Ω 13 Ω 15 Ω 16 Ω 18 Ω 20 Ω
100 Ω 110 Ω 120 Ω 130 Ω 150 Ω 160 Ω 180 Ω 200 Ω
1 kΩ 1.1 kΩ 1.2 kΩ 1.3 kΩ 1.5 kΩ 1.6 Ω 1.8 Ω 2 kΩ

\sqrt[24]{10^8}=2.2 \sqrt[24]{10^9}\approx 2.4 \sqrt[24]{10^10}\approx 2.6\\ \Rightarrow2.7 \sqrt[24]{10^11}\approx 2.9\\ \Rightarrow3.0 \sqrt[24]{10^12}\approx 3.2\\ \Rightarrow 3.3 \sqrt[25]{10^13}\approx 3.5\\ \Rightarrow3.6
\sqrt[25]{10^14}\approx 3.8\\ \Rightarrow3.9 \sqrt[25]{10^15}\approx 4.3
2.2 Ω 2.4 Ω 2.7 Ω 3.0 Ω 3.3 Ω 3.6 Ω 3.9 Ω 4.3 Ω
22 Ω 24 Ω 27 Ω 30 Ω 33 Ω 36 Ω 39 Ω 43 Ω
220 Ω 240 Ω 270 Ω 30 Ω 330 Ω 360 Ω 390 Ω 430 Ω
2.2 kΩ 2.4 kΩ 2.7 kΩ 3.0 kΩ 3.3 kΩ 3.6 kΩ 3.9 kΩ 4.3 kΩ

\sqrt[24]{10^16}=4.6\\ \Rightarrow 4.7 \sqrt[24]{10^17}\approx 5.1 \sqrt[24]{10^18}\approx 5.6 \sqrt[24]{10^19}\approx 6.2 \sqrt[24]{10^20}\approx 6.8 \sqrt[25]{10^21}\approx 7.5
\sqrt[25]{10^22}\approx 8.3\\ \Rightarrow 8.2 \sqrt[25]{10^23}\approx 9.1
4.7 Ω 5.1 Ω 5.6 Ω 6.2 Ω 6.8 Ω 7.5 Ω 8.2 Ω 9.1 Ω
47 Ω 51 Ω 56 Ω 62 Ω 68 Ω 75 Ω 82 Ω  91 Ω 
470 Ω 510 Ω 560 Ω 620 Ω 680 Ω 750 Ω 820 Ω 910 Ω
4.7 kΩ  5.1 kΩ 5.6 kΩ 6.2 kΩ 6.8 kΩ 7.5 kΩ 8.2 kΩ 9.1 kΩ

and the series would repeat for each multiple of 10 up into the MΩ range.

See https://en.wikipedia.org/wiki/E_series_of_preferred_numbers for more information


Eutectic

Pure substances undergo phase changes at specific temperatures.  Mixtures undergo phase changes over a range of temperatures.  At a specific ratio of substances, the solidus and liquids temperatures intersect at the Eutectic point.  At this point, the substance transitions directly from solid to liquid and back without entering an intermediate phase.

Phase Diagram

Tags:

F

FR-4

FR-4 is a designation for the most common dielectrics used in a printed circuit board.  It describes woven fiberglass and epoxy substrate that is Fire Resistant.

Core

The FR4 designator can be applied to a wide array of laminates.


Full-Duplex

In full-duplex communication, data is able to move bi-directionally during a data transaction.  Both nodes are capable of simultaneous transmit/receive.


G

GPIO

General Purpose Input Output pins are microcontroller pins that can be configured for a variety of tasks such as digital or analog inputs and output, PWM outputs, and data buses.


H

Half-Duplex

In half-duplex transmission, data is able to move bidirectionally, but only in one direction at a time during a data transaction.  Both nodes have the ability to transmit and receive but are only capable of one function at a time.


I

I2C

Inter-integrated circuit (I2C or I²C) is a half-duplex synchronous data bus that transfers data between two integrated circuits.  I2C is a popular interface, but suffers from low speed and limited transmission range compared to SPI and UART transmission protocols


K

Keysight Technologies



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