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Last update: 8 August 2010

IC numbers:NE556, LM556, RC556
IC function:Dual timer
Related components:555 single timer

Component documentation
IC numberManufacturerDocumentation
NE556Texas InstrumentsWeb page, Datasheet (PDF)
Signetics (now Philips)Web page, Datasheet (PDF)
LM556National SemiconductorWeb page, Datasheet (PDF)
NJM556New Japan RadioDatasheet (PDF)
RC556Raytheon SemiconductorsNot available

Component versions
PackageCBM part numberCBM part descriptionReplacement parts
14-pin DIP901523-03Lin Dual Timer NE556 NE556 available from:Conrad
NE556N available from:Conrad

Positions
DevicePositionPackage
A2300IC16DIP
A2301IC16DIP
A1000 keyboard PCBDIP
KIM-IU25DIP
C64U20DIP
C64C B-3 boardU20DIP
SX 64 I/O boardUE3DIP
C128U27DIP
C128D CRU27DIP
CBM II lo-profileU97DIP
CBM II hi-profileU20DIP

Pinout
PinTimerFunction
11Discharge
21Threshold
31Control Voltage
41Reset
51Output
61Trigger
7bothGND
82Trigger
92Output
102Reset
112Control Voltage
122Threshold
132Discharge
14bothVCC

Copyright © 2003-2010 Ronald van Dijk - All rights reserved