User guide

33
AT89C55WD
1921B–MICRO–09/02
Ordering Information
Speed
(MHz)
Power
Supply Ordering Code Package Operation Range
24 4.0V to 5.5V AT89C55WD-24AC
AT89C55WD-24JC
AT89C55WD-24PC
44A
44J
40P6
Commercial
(0°Cto70°C)
AT89C55WD-24AI
AT89C55WD-24JI
AT89C55WD-24PI
44A
44J
40P6
Industrial
(-40°Cto85°C)
33 4.5V to 5.5V AT89C55WD-33AC
AT89C55WD-33JC
AT89C55WD-33PC
44A
44J
40P6
Commercial
(0°Cto70°C)
Package Type
44A 44-lead, Thin Plastic Gull Wing Quad Flatpack (TQFP)
44J 44-lead, Plastic J-leaded Chip Carrier (PLCC)
40P6 40-pin, 0.600" Wide, Plastic Dual Inline Package (PDIP)