555 Timer ICs

The 555 timer is a highly stable controller capable of producing accurate time delays or oscillation. The 556 timer combines two 555 timers on a single chip.The 555 can be used in countless applications and has three recognised operating modes. In monostable mode the 555 functions as a one-shot or pulse stretcher. Applications include timers, missing pulse detection and bouncefree switches.In astable mode the 555 can operate as an oscillator. Applications include LED and lamp flashers, pulse generation, logic clocks, tone generation, security alarms and Pulse Width Modulation (PWM).In bistable mode the 555 can operate as a flip-flop or changeover. Applications include bouncefree latched switches.The ICM7555 and ICM7556 are improved versions including lower supply current and a wide supply voltage range.

Bipolar and CMOS technologies, CMOS offering lower power consumption (1mW typ at V_DD=5V)
TTL logic compatible
Through hole and surface mount
Choice of leading brands

Products
Technical Details
Questions (3)

Device	Function	Manufacturer	Package	Order code
NE555N	Single timer	TI	DIL-8	82-0336
NE555D	Single timer	TI	SO-8	82-0338
TS555CD	Low power CMOS single timer	TI	SO-8	82-1050
TLC555ID	CMOS single timer	TI	SOIC-8	82-1200
TLC555CP	LinCMOS timer	TI	DIL-8	82-0342
SA555P	Single timer TTL compatible	TI	DIL-8	51-7531
ICM7555IPA	Single low power timer	Intersil	DIL-8	82-0774
ICM7555IBA	Single low power timer	Intersil	SO-8	82-0772
TLC556CN	Dual LinCMOS timer	TI	DIL-8	51-7532
NE556D	Dual timer TTL compatible	TI	SO-14	51-7533
NE556N	Dual timer	TI	DIL-14	82-0344
TS556CN	Low power CMOS dual timer	ST	DIL-14	82-1052
ICM7556IPD	Dual low power timer	Intersil	DIL-14	82-0776

31 August 2015 Question by: Mr Chris Marsters

Q. Are any of the 555 version you stock not CMOS

A. Hi Chris, thank you for your question. The standard bipolar version can be found here.

07 April 2014 Question by: Ian Simpson | Product code: 82-1200

Q. Hi, I am looking for surface mount version of the TLC555CP and both the TLC555CD and the TLC555ID look okay. What is the difference between the CD and ID ?

A. Hi Ian. Thank you for your question. The ID is the industrial temperature range device +40 to 85 degrees. The CD is the standard temperature version 0 to 70 degrees. The difference is only the operation temperature range.

27 May 2012 Question by: Karlson | Product code: 82-0336

Q. Does the 555 timer come with a chip holder which allows me to solder it onto a PCB?

A. Thanks for your enquiry. No I'm afraid the chip does not come with a holder, it's sold seperately as product code 22-1720.

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555 Timer ICs

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