555 timer ic (Danish Wikipedia)

Mange referencer: March 11, 2022, edn.com: The NE555 current spike, backup Citat: "...The power supply went crazy, overcurrents pinning the meter, and so forth...The issue is well-documented. At first I didn’t know what to make of it, as it seemed to be a serious design flaw: Totem-pole outputs, connected directly to the positive rail and ground, without any kind of current limiting or special switch timing...Various people have posted scope traces and described the issue [3,4,5,6,11,14,15]. Typical reports are of a current spike that lasts 100-200 nsec and pulls about 300 mA...With no decoupling capacitors, power supply drops can be seen of more than half the supply voltage...But efforts at producing a “better” bipolar 555 have all succumbed to the overwhelming force of the original..."

fairchildsemi.com

"Data Sheet (Fairchild) (PDF)" (PDF). Arkiveret (PDF) fra originalen 26. oktober 2000. Hentet 9. juli 2006.

nutsvolts.com

nutsvolts.com: ‘555’ Monostable Circuits, backup Citat: "...Worst of all, it draws a brief (a fraction of a microsecond) but massive 400 mA spike of supply current as its output transitions from one state to the other, and this generates an RF noise burst that can play havoc with nearby digital circuits. In critical 555 applications, this RF burst can be suppressed by wiring an electrolytic capacitor (10 µF to 100 µF) directly between supply pins 8 and 1. The 7555 CMOS device suffers from none of these snags; it can use supplies in the range of 2V to 18V, draws only 100µA quiescent from a 15V supply, and draws a peak spike current of only 10 mA when its output transitions from one state to the other, thus generating negligible switching RFI..."

sound-au.com

sound-au.com: The 555 Timer. Rod Elliott - Copyright 2015, backup Citat: "...It's easily simulated, and my simulation showed a peak current of around 100mA, lasting for about 100ns (0.1µs). A bypass capacitor is always needed to handle this, and the minimum is 10µF. In the drawings below I used 47µF, which will usually mitigate supply voltage disturbances..."

talkingelectronics.com

talkingelectronics.com, SHOOT-THROUGH: 555 Circuits (more than 101 Circuits), backup Citat: "...The 555 (the TTL version, such as NE555, SE555) has a problem that both the output transistors turn ON when the output changes from HIGH to LOW or LOW to HIGH. This only occurs for a very short period of time...That's why you need a large-value electrolytic (100u) across the 555 and try to avoid using it with counting-chips and microcontrollers..."

web.archive.org

"The 555 Timer Was Just The Beginning For Hans Camenzind". electronicdesign.com. 28. november 2012. Arkiveret fra originalen den 25. april 2015. Hentet 6. juni 2015.{{cite web}}: CS1-vedligeholdelse: BOT: original-url status ukendt (link)
"blog: Long Live the 555 Timer IC". electronicdesign.com. 16. august 2012. Arkiveret fra originalen den 15. marts 2015. Hentet 6. juni 2015.{{cite web}}: CS1-vedligeholdelse: BOT: original-url status ukendt (link)
Web archive backup: 555 Timer Tutorial
Datablad: 1972 Signetics NE555 datasheet (PDF) Arkiveret 28. september 2011 hos Wayback Machine
nutsvolts.com: ‘555’ Monostable Circuits, backup Citat: "...Worst of all, it draws a brief (a fraction of a microsecond) but massive 400 mA spike of supply current as its output transitions from one state to the other, and this generates an RF noise burst that can play havoc with nearby digital circuits. In critical 555 applications, this RF burst can be suppressed by wiring an electrolytic capacitor (10 µF to 100 µF) directly between supply pins 8 and 1. The 7555 CMOS device suffers from none of these snags; it can use supplies in the range of 2V to 18V, draws only 100µA quiescent from a 15V supply, and draws a peak spike current of only 10 mA when its output transitions from one state to the other, thus generating negligible switching RFI..."
Mange referencer: March 11, 2022, edn.com: The NE555 current spike, backup Citat: "...The power supply went crazy, overcurrents pinning the meter, and so forth...The issue is well-documented. At first I didn’t know what to make of it, as it seemed to be a serious design flaw: Totem-pole outputs, connected directly to the positive rail and ground, without any kind of current limiting or special switch timing...Various people have posted scope traces and described the issue [3,4,5,6,11,14,15]. Typical reports are of a current spike that lasts 100-200 nsec and pulls about 300 mA...With no decoupling capacitors, power supply drops can be seen of more than half the supply voltage...But efforts at producing a “better” bipolar 555 have all succumbed to the overwhelming force of the original..."
sound-au.com: The 555 Timer. Rod Elliott - Copyright 2015, backup Citat: "...It's easily simulated, and my simulation showed a peak current of around 100mA, lasting for about 100ns (0.1µs). A bypass capacitor is always needed to handle this, and the minimum is 10µF. In the drawings below I used 47µF, which will usually mitigate supply voltage disturbances..."
talkingelectronics.com, SHOOT-THROUGH: 555 Circuits (more than 101 Circuits), backup Citat: "...The 555 (the TTL version, such as NE555, SE555) has a problem that both the output transistors turn ON when the output changes from HIGH to LOW or LOW to HIGH. This only occurs for a very short period of time...That's why you need a large-value electrolytic (100u) across the 555 and try to avoid using it with counting-chips and microcontrollers..."
"Data Sheet (Fairchild) (PDF)" (PDF). Arkiveret (PDF) fra originalen 26. oktober 2000. Hentet 9. juli 2006.