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- Latchup abstract "A latchup is a type of short circuit which can occur in an improperly designed integrated circuit (IC). More specifically it is the inadvertent creation of a low-impedance path between the power supply rails of a MOSFET circuit, triggering a parasitic structure which disrupts proper functioning of the part, possibly even leading to its destruction due to overcurrent. A power cycle is required to correct this situation.The parasitic structure is usually equivalent to a thyristor (or SCR), a PNPN structure which acts as a PNP and an NPN transistor stacked next to each other. During a latchup when one of the transistors is conducting, the other one begins conducting too. They both keep each other in saturation for as long as the structure is forward-biased and some current flows through it - which usually means until a power-down. The SCR parasitic structure is formed as a part of the totem-pole PMOS and NMOS transistor pair on the output drivers of the gates.The latchup does not have to happen between the power rails; it can happen at any place where the required parasitic structure exists. A spike of positive or negative voltage on an input or output pin of a digital chip, exceeding the rail voltage by more than a diode drop, is a common cause of latchup. Another cause is the supply voltage exceeding the absolute maximum rating, often from a transient spike in the power supply, leading to a breakdown of some internal junction. This frequently happens in circuits which use multiple supply voltages that do not come up in the proper order after a power-up, leading to voltages on data lines exceeding the input rating of parts that have not yet reached a nominal supply voltage. Yet another common cause of latchups is ionizing radiation which makes this a significant issue in electronic products designed for space (or very high-altitude) applications.".
- Latchup thumbnail Latchup.png?width=300.
- Latchup wikiPageExternalLink index.html.
- Latchup wikiPageExternalLink latch-up.html.
- Latchup wikiPageExternalLink eevblog-16-all-about-cmos-scr-latchup.
- Latchup wikiPageExternalLink latchup-protection.
- Latchup wikiPageExternalLink 1836.
- Latchup wikiPageID "2081342".
- Latchup wikiPageRevisionID "584516826".
- Latchup hasPhotoCollection Latchup.
- Latchup subject Category:Integrated_circuits.
- Latchup subject Category:Semiconductor_device_defects.
- Latchup type Artifact100021939.
- Latchup type Circuit103033362.
- Latchup type ComputerCircuit103084420.
- Latchup type Device103183080.
- Latchup type ElectricalDevice103269401.
- Latchup type Instrumentality103575240.
- Latchup type IntegratedCircuit103577090.
- Latchup type IntegratedCircuits.
- Latchup type Object100002684.
- Latchup type PhysicalEntity100001930.
- Latchup type Whole100003553.
- Latchup comment "A latchup is a type of short circuit which can occur in an improperly designed integrated circuit (IC). More specifically it is the inadvertent creation of a low-impedance path between the power supply rails of a MOSFET circuit, triggering a parasitic structure which disrupts proper functioning of the part, possibly even leading to its destruction due to overcurrent.".
- Latchup label "Latch-Up-Effekt".
- Latchup label "Latch-up".
- Latchup label "Latchup".
- Latchup sameAs Latch-Up-Effekt.
- Latchup sameAs Latch-up.
- Latchup sameAs m.06kwh1.
- Latchup sameAs Q491282.
- Latchup sameAs Q491282.
- Latchup sameAs Latchup.
- Latchup wasDerivedFrom Latchup?oldid=584516826.
- Latchup depiction Latchup.png.
- Latchup isPrimaryTopicOf Latchup.
