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NM27C256 View Datasheet(PDF) - Fairchild Semiconductor

Part NameDescriptionManufacturer
NM27C256 262,144-Bit (32K x 8) High Performance CMOS EPROM Fairchild
Fairchild Semiconductor Fairchild
NM27C256 Datasheet PDF : 11 Pages
1 2 3 4 5 6 7 8 9 10
Physical Dimensions inches (millimeters) unless otherwise noted
0.045
[1.143]
0.000-0.010
[0.00-0.25]
Polished Optional
5
0.549-0.553
[13.94-14.05]
-B-
0.485-0.495
[12.32-12.57]
0.007[0.18] S B D-E S
0.449-0.453
[11.40-11.51]
-A-
0.007[0.18] S B D-E S
0.002[0.05] S B
-D-
4
1
30
29
-G-
0.106-0.112
[2.69-2.84]
0.023-0.029
[0.58-0.74]
0.541-0.545
[13.74-13-84]
-H-
Base
Plane
0.015
[0.38] Min Typ
(
0.400
[10.16]
)
0.490-0530
[12.45-13.46]
0.015[0.38] S C D-E, F-G S
0.585-0.595
[14.86-15.11]
-F-
See detail A
13
21
14
0.002[0.05] S A
20
-E-
0.050
0.123-0.140
[3.12-3.56]
0.007[0.18] S A F-G S
0.007[0.18] S A F-G S
0.118-0.129
[3.00-3.28]
0.010[0.25] L B A D-E, F-G S
B
0.042-0.048
45°X [1.07-1.22]
,,B
0.025
[0.64]
Min
0.006-0.012
[0.15-0.30]
-J-
-C-
0.004[0.10]
0.013-0.021
[0.33-0.53]
TYP
0.007[0.18] M C D-E, F-G S
0.078-0.095
[1.98-2.41]
0.020
[0.51]
0.005 Max
[0.13] 0.0100
[0.254]
0.025
[0.64] Min
0.021-0.027
[0.53-0.69]
0.045
[1.14]
Detail A
Typical
Rotated 90°
R
0.030-0.040
[0.76-1.02]
0.065-0.071
[1.65-1.80]
0.053-0.059
[1.65-1.80]
0.031-0.037
[0.79-0.94]
0.026-0.032
[0.66-0.81]
Typ
0.019-0.025
[0.48-0.64]
0.027-0.033
[0.69-0.84]
0.007[0.18] S H D-E, F-G S
Section B-B
Typical
32-Lead Plastic Leaded Chip Carrier (PLCC)
Order Number NM27C256VXXX
Package Number VA32A
10
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