AT89C55WD Atmel Corporation, AT89C55WD Datasheet - Page 34

• Manufacturer Part Number: AT89C55WD
• Manufacturer: Atmel Corporation

Specifications of AT89C55WD

• Flash (kbytes): 20 Kbytes
• Max. Operating Frequency: 24 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Uart: 1
• Sram (kbytes): 0.25
• Operating Voltage (vcc): 4.0 to 6.0
• Timers: 3
• Watchdog: Yes

39.3
34
SEATING PLANE
Notes:
40P6 – PDIP
AT89C55WD
R
2325 Orchard Parkway
San Jose, CA 95131
1. This package conforms to JEDEC reference MS-011, Variation AC.
2. Dimensions D and E1 do not include mold Flash or Protrusion.
A
Mold Flash or Protrusion shall not exceed 0.25 mm (0.010").
L
e
C
TITLE
40P6, 40-lead (0.600"/15.24 mm Wide) Plastic Dual
Inline Package (PDIP)
eB
E
D
B1
0º ~ 15º
PIN
1
REF
B
A1
E1
SYMBOL
A
A1
D
E
E1
B
B1
L
C
eB
e
52.070
15.240
13.462
15.494
0.381
0.356
1.041
3.048
0.203
COMMON DIMENSIONS
MIN
(Unit of Measure = mm)
–
2.540 TYP
NOM
–
–
–
–
–
–
–
–
–
–
DRAWING NO.
52.578
15.875
13.970
17.526
4.826
0.559
1.651
3.556
0.381
MAX
40P6
–
1921D–MICRO–6/08
Note 2
Note 2
NOTE
09/28/01
REV.
B