In electronics, a pinout (sometimes written "pin-out") is a cross-reference between the contacts, or pins, of an electrical connector or electronic component, and their functions. "Pinout" now supersedes the term "basing diagram" which was the standard terminology used by the manufacturers of vacuum tubes and the RMA. The RMA started its standardization in 1934, collecting and correlating tube data for registration at what was to become the EIA. The EIA (Electronic Industries Alliance) now has many sectors reporting to it and sets what is known as EIA standards where all registered pinouts and registered jacks can be found.
A pinout diagram of a very common 555 timer integrated circuit showing its eight pins (numbered 1-8) and their corresponding functions ("ground", "trigger", "output", etc.)
The functions of contacts in electrical connectors, be they power- or signaling-related, must be specified for connectors to be interchangeable. Each connector contact must mate with the contact on the other connector with the same function. If contacts of disparate functions are allowed to make contact, the connection may fail, and damage may result. Therefore, pinouts are a vital reference when building and testing connectors, cables, and adapters.
Suppose one has specified wires within a cable (for instance, the colored Ethernet cable wires in ANSI/TIA-568 T568A). In that case, the order in which different color wires are attached to pins of an electrical connector defines the wiring scheme. In any multi-pin connector, there are multiple ways to map wires to pins, so different configurations may be created that superficially look identical but function differently. Pinouts define these configurations. Many connectors have multiple standard pinouts in use for different manufacturers or applications.[1]
Terminologyedit
While one usage of the word pin is to refer to electrical contacts of, specifically, the male gender, its usage in pinout does not imply gender: the contact-to-function cross-reference for a connector that has only female socket contacts is still called a pinout.
Representationedit
The pinout can typically be shown as a table or diagram. However, it is necessary to clarify how to view the diagram, stating if it shows the backside of the connector (where wires are attached) or the "mating face" of the connector. Published pinouts, which are particularly important when different manufacturers want to interconnect their products using open standards, are typically provided by the connector or equipment manufacturer. However, some pinouts are provided by 3rd parties since the manufacturer does not well document some connectors.
While repairing electronic devices, an electronics technician uses electronic test equipment to "pin out" each component on a PCB. The technician probes each pin of the component in turn, comparing the expected signal on each pin to the actual signal on that pin.
Example pinoutsedit
USB pinoutedit
Viewed from the front (outside) of Female Type A USB receptacle:
Carry out output - outputs high on counts 0 to 4, outputs low on counts 5 to 9 (thus a transition from low to high occurs when counting from 9 back to 0)
13
EN
Latch enable - latches on the current output when high (i.e., the chip counts when EN is low)
14
CLK
Clock in
15
RST
Reset - sets output 1 high and outputs 2 through 10 low, when taken high
16
+9 V, VCC
The connection to the +VCC rail (voltage between +3 V and +15 V)
^"Handbook of hardware schemes, cables layouts and connectors". pinouts.ru. Retrieved 2016-04-25.
External linksedit
Wikimedia Commons has media related to Electronic diagrams.
The Hardware Book - Pinout collection
Crossover search of pinouts at pinout.net
Pinouts of hardware connectors with a description of common interfaces at pinouts.ru
Pinouts (pin-out) - Historical Pinouts collection
74xxx and 40xx (pin-outs) - Pinouts collection
Pin Configuration of ICs and semiconductors (pin-outs) - Pinouts collection
January 01, 1970
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Not to be confused with PinOut In electronics a pinout sometimes written pin out is a cross reference between the contacts or pins of an electrical connector or electronic component and their functions Pinout now supersedes the term basing diagram which was the standard terminology used by the manufacturers of vacuum tubes and the RMA The RMA started its standardization in 1934 collecting and correlating tube data for registration at what was to become the EIA The EIA Electronic Industries Alliance now has many sectors reporting to it and sets what is known as EIA standards where all registered pinouts and registered jacks can be found A pinout diagram of a very common 555 timer integrated circuit showing its eight pins numbered 1 8 and their corresponding functions ground trigger output etc Contents 1 Purpose 2 Terminology 3 Representation 4 Example pinouts 4 1 USB pinout 4 2 PS 2 pinout 4 3 4017 decade counter 4 4 LM741 operational amplifier 5 See also 6 References 7 External linksPurpose editThe functions of contacts in electrical connectors be they power or signaling related must be specified for connectors to be interchangeable Each connector contact must mate with the contact on the other connector with the same function If contacts of disparate functions are allowed to make contact the connection may fail and damage may result Therefore pinouts are a vital reference when building and testing connectors cables and adapters Suppose one has specified wires within a cable for instance the colored Ethernet cable wires in ANSI TIA 568 T568A In that case the order in which different color wires are attached to pins of an electrical connector defines the wiring scheme In any multi pin connector there are multiple ways to map wires to pins so different configurations may be created that superficially look identical but function differently Pinouts define these configurations Many connectors have multiple standard pinouts in use for different manufacturers or applications 1 Terminology editWhile one usage of the word pin is to refer to electrical contacts of specifically the male gender its usage in pinout does not imply gender the contact to function cross reference for a connector that has only female socket contacts is still called a pinout Representation editThe pinout can typically be shown as a table or diagram However it is necessary to clarify how to view the diagram stating if it shows the backside of the connector where wires are attached or the mating face of the connector Published pinouts which are particularly important when different manufacturers want to interconnect their products using open standards are typically provided by the connector or equipment manufacturer However some pinouts are provided by 3rd parties since the manufacturer does not well document some connectors While repairing electronic devices an electronics technician uses electronic test equipment to pin out each component on a PCB The technician probes each pin of the component in turn comparing the expected signal on each pin to the actual signal on that pin Example pinouts editUSB pinout edit Viewed from the front outside of Female Type A USB receptacle nbsp 5V Red Data White Data Green GND Black PS 2 pinout edit nbsp PS 2 connector pinout Pin number Name Purpose 1 DATA Data 2 Not used 3 GND Ground 4 Vcc 5V Common collector voltage 5 CLK Clock signal 6 Not used 4017 decade counter edit nbsp 4017 pinout Pin number Name Purpose 1 6 The 6th sequential output 2 2 The 2nd sequential output 3 1 The 1st sequential output 4 3 The 3rd sequential output 5 7 The 7th sequential output 6 8 The 8th sequential output 7 4 The 4th sequential output 8 0 V VDD The connection to the 0 V rail 9 9 The 9th sequential output 10 5 The 5th sequential output 11 10 The 10th sequential output 12 CO Carry out output outputs high on counts 0 to 4 outputs low on counts 5 to 9 thus a transition from low to high occurs when counting from 9 back to 0 13 EN Latch enable latches on the current output when high i e the chip counts when EN is low 14 CLK Clock in 15 RST Reset sets output 1 high and outputs 2 through 10 low when taken high 16 9 V VCC The connection to the VCC rail voltage between 3 V and 15 V LM741 operational amplifier edit nbsp See also editDatasheet Piping and instrumentation diagram Circuit diagram Schematic 4000 series Crossover cableReferences edit Handbook of hardware schemes cables layouts and connectors pinouts ru Retrieved 2016 04 25 External links edit nbsp Wikimedia Commons has media related to Electronic diagrams The Hardware Book Pinout collection Crossover search of pinouts at pinout net Pinouts of hardware connectors with a description of common interfaces at pinouts ru Pinouts pin out Historical Pinouts collection 74xxx and 40xx pin outs Pinouts collection Pin Configuration of ICs and semiconductors pin outs Pinouts collection Retrieved from https en wikipedia org w index php title Pinout amp oldid 1152061358, 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