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<P>The <STRONG>555</STRONG> timer is a highly stable controller capable of producing accurate time delays or oscillation. The <STRONG>556</STRONG> timer combines two 555 timers on a single chip.</P><P>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.</P><P>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).</P><P>In bistable mode the 555 can operate as a flip-flop or changeover. Applications include bouncefree latched switches.</P><P>The <STRONG>ICM7555</STRONG> and <STRONG>ICM7556</STRONG> are improved versions including lower supply current and a wide supply voltage range.</P>
  • Bipolar and CMOS technologies, CMOS offering lower power consumption (1mW typ at VDD=5V)
  • TTL logic compatible
  • Through hole and surface mount
  • Choice of leading brands
DeviceFunctionManufacturerPackageOrder code
NE555NSingle timerTIDIL-882-0336
NE555DSingle timerTISO-882-0338
TS555CDLow power CMOS single timerTISO-882-1050
TLC555IDCMOS single timerTISOIC-882-1200
TLC555CPLinCMOS timerTIDIL-882-0342
SA555PSingle timer TTL compatibleTIDIL-851-7531
ICM7555IPASingle low power timerIntersilDIL-882-0774
TLC556CNDual LinCMOS timerTIDIL-851-7532
NE556DDual timer TTL compatibleTISO-1451-7533
NE556NDual timerTIDIL-1482-0344
TS556CNLow power CMOS dual timerSTDIL-1482-1052
ICM7556IPDDual low power timerIntersilDIL-1482-0776
*Question functionality currently disabled

31 August 2015 Question by: Rapid Customer
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: Rapid Customer | 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: Rapid Customer | 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.