NM27C256 Fairchild, NM27C256 Datasheet - Page 10

• Manufacturer Part Number: NM27C256
• Description: 262 /144-Bit (32K x 8) High Performance CMOS EPROM
• Manufacturer: Fairchild

Physical Dimensions
[14.86-15.11]
0.585-0.595
0.118-0.129
[13.94-14.05]
[3.00-3.28]
Polished Optional
0.549-0.553
0.007[0.18]
0.000-0.010
[0.00-0.25]
[1.143]
-B-
0.010[0.25]
0.045
0.026-0.032
[0.66-0.81]
0.007[0.18]
0.007[0.18]
0.002[0.05] S
S
-F-
13
L
A
5
inches (millimeters) unless otherwise noted
Typ
S
B A
F-G
32-Lead Plastic Leaded Chip Carrier (PLCC)
S
H
B
14
A
4
S
D-E, F-G
A
0.007[0.18]
0.007[0.18]
D-E, F-G
0.002[0.05]
F-G
[12.32-12.57]
[11.40-11.51]
0.485-0.495
0.449-0.453
45 X
-A-
S
B
S
1
S
Order Number NM27C256VXXX
S
S
0.042-0.048
S
[1.07-1.22]
B
B
B
-D-
-E-
D-E
D-E
Package Number VA32A
30
20
S
S
21
29
-G-
0.050
0.006-0.012
0.019-0.025
[0.15-0.30]
[0.48-0.64]
Min
0.025
[0.64]
[13.74-13-84]
0.541-0.545
0.106-0.112
0.023-0.029
0.123-0.140
[3.12-3.56]
[2.69-2.84]
[0.58-0.74]
See detail A
10
Section B-B
Typical
0.025
[0.64] Min
0.004[0.10]
0.021-0.027
[0.53-0.69]
0.027-0.033
[0.69-0.84]
-H-
-J-
-C-
0.031-0.037
[0.79-0.94]
(
0.053-0.059
[1.65-1.80]
[10.16]
0.400
0.065-0.071
[1.65-1.80]
0.015
[0.38]
0.013-0.021
[0.33-0.53]
0.078-0.095
[1.98-2.41]
Base
Plane
)
0.007[0.18]
Min Typ
0.015[0.38]
0.045
[1.14]
TYP
0.020
[0.51]
[12.45-13.46]
Rotated 90
0.490-0530
M
Detail A
Typical
S
C
C
D-E, F-G
D-E, F-G
0.005
[0.13]
R
S
0.030-0.040
[0.76-1.02]
Max
S
0.0100
[0.254]
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