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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
1.450
[36.83]
MAX
28
15
R 0.025
[0.64]
0.600
[15.24]
0.520 ± 0.006
[13.21 ±0.15]
MAX
Glass
1
R 0.030-0.055
[0.76 - 1.40]
TYP
14
0.280 ±0.010
[7.11 ±0.25]
UV WINDOW
0.225 MAX TYP
0.005 MIN
TYP
0.125 MIN
TYP
0.060-0.1000.090-0.110
TYP
TYP
0.050-0.060
TYP
0.015-0.021
TYP
0.175
MAX
Glass
Sealant
0.590-0.620
[14.99 - 15.75]
86°-94°
TYP
0.015 -0.060
TYP
0.150 MIN
TYP
95° ±5°
TYP
0.010 ±0.002 TYP
[0.25 ±0.05]
0.685
+0.025
-0.060
17.40
+0.64
-1.52
UV Window Cavity Dual-In-Line CerDIP Package (Q)
Order Number NM27C256QXXX
Package Number J28AQ
0.030 Max
(0.762)
0.600 - 0.620
(15.24 - 15.75)
95° ±5°
0.580
(14.73)
+0.025
0.625 -0.015
(15.88
+0.635
-0.381
0.008-0.015
(0.229-0.381)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
0.510 ±0.005
(12.95 ±0.127)
0.062 RAD
(1.575)
Pin #1
IDENT
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1.393 - 1.420
(35.38 - 36.07)
0.053 - 0.069
(1.346 - 1.753)
0.050
(1.270)
Typ
0.125-0.165
(3.175-4.191)
0.20 Min
(0.508)
0.050 ±0.015
(1.270 ±0.381)
0.108 ±0.010
(2.540 ±0.254)
88° 94°
Typ
0.018 ±0.003
(0.457 ±0.076)
0.125-0.145
(3.175-3.583)
28-Lead Plastic One-Time-Programmable Dual-In-Line Package
Order Number NM27C256NXXX
Package Number N28B
9
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