NM27C256 Fairchild, NM27C256 Datasheet - Page 9

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

Physical Dimensions
(0.762)
0.030
0.225 MAX TYP
Max
R 0.025
[0.64]
95
0.125 MIN
(
28-Lead Plastic One-Time-Programmable Dual-In-Line Package
0.625
15.88
(15.24 - 15.75)
0.600 - 0.620
TYP
(14.73)
0.580
5
R 0.030-0.055
0.060-0.100
[0.76 - 1.40]
+0.025
-0.015
+0.635
-0.381
TYP
TYP
UV Window Cavity Dual-In-Line CerDIP Package (Q)
28
1
0.005 MIN
inches (millimeters) unless otherwise noted
TYP
0.090-0.110
(
TYP
(0.229-0.381)
0.008-0.015
Order Number NM27C256QXXX
Order Number NM27C256NXXX
[36.83]
1.450
MAX
Package Number J28AQ
Package Number N28B
0.280 0.010
[7.11 0.25]
UV WINDOW
0.050-0.060
TYP
0.015-0.021
(1.270 0.381)
0.050 0.015
Pin #1
IDENT
TYP
(1.346 - 1.753)
(12.95 0.127)
0.053 - 0.069
0.510 0.005
86 -94
9
TYP
28 27 26 25
15
14
1 2 3 4
[15.24]
0.600
Glass
MAX
0.175
MAX
0.150 MIN
(1.575)
0.062
TYP
0.520
[13.21 0.15]
0.015 -0.060
(2.540 0.254)
24
0.108 0.010
5
RAD
TYP
23 22 21 20 19 18 17 16
6
(35.38 - 36.07)
0.006
1.393 - 1.420
7
8 9 10 11 12 13 14
Glass
Sealant
(0.457 0.076)
0.018 0.003
(1.270)
0.050
95
Typ
TYP
5
[14.99 - 15.75]
0.685
17.40
0.590-0.620
0.010 0.002
15
88 94
[0.25 0.05]
Typ
+0.025
-0.060
+0.64
-1.52
(3.175-4.191)
0.125-0.165
(3.175-3.583)
0.125-0.145
TYP
(0.508)
0.20
www.fairchildsemi.com
Min