INFO
TTL & CMOS
http://www.hippy.freeserve.co.uk/chipxref.htm
http://hamradio.cmcorp.com/inventory/LOGIC/cmos.html

Chip Directory
http://www.embeddedlinks.com/chipdir
http://www.embeddedlinks.com/chipdir/mirror.htm?index.htm

Giant Internet IC Masterbator
http://www.falstaff.demon.co.uk/GIICM.html

Integra Technologies L.L.C.
http://www.integra-tech.com/swlibry.html

Rudd’s Commodore Site: Electronics
http://home.hccnet.nl/g.baltissen/elec.htm

IntuSoft Spice models
http://www.intusoft.com/models/total2.txt

PartMiner Direct
http://www.freetradezone.com

TTL datasheets
http://www.cubic.org/source/archive/hardware/discrete/ttl/#mand

SUPPLIERS
CMOS
http://hamradio.cmcorp.com/inventory/LOGIC/cmos.html

ICs
Futurelec
http://www.xs4all.nl/~ganswijk/chipdir/n/76.htm

OBSOLETE
Alltronics
(408-943-9773; http://www.alltronics.com)

Chip Directory
http://www.ba-karlsruhe.de/chipdir/obsolete.html

D.R. Components
561-274-8840; http://www.drcomponents.com/stockcheck.html

Obsolete IC Sources
http://www.bithose.com/serfaq/REPAIR/F_Obsol_IC.html

Online Technology Exchange, Inc.
800-606/8459; http://www.onlinetechx.com

Surplus/Excess Electronic Components
http://www.xcess.com/Products/ic.htm

Worldwide Semiconductor
http://www.worldsemi.com/