10
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FM27C256 262,144-Bit (32K x 8) High Performance CMOS EPROM
www.fairchildsemi.com
FM27C256 Rev. A
Physical Dimensions inches (millimeters) unless otherwise noted
0.007[0.18]
A
S
S
F-G
0.007[0.18]
B
S
D-E
0.449-0.453
[11.40-11.51]
S
0.045
[1.143]
0.000-0.010
[0.00-0.25]
Polished Optional
0.585-0.595
[14.86-15.11]
0.549-0.553
[13.94-14.05]
-B-
-F-
-E-
-G-
0.050
21
29
30
1
4
2014
13
5
-D-
0.007[0.18]
B
S
D-E
S
0.002[0.05]
B
S
-A-
0.485-0.495
[12.32-12.57]
0.007[0.18]
A
S
S
F-G
A
0.002[0.05]
S
0.007[0.18]
H
S
S
D-E, F-G
0.010[0.25]
B A
S
D-E, F-G
0.118-0.129
[3.00-3.28]
L
B
B
45
°X
0.042-0.048
[1.07-1.22]
0.026-0.032
[0.66-0.81]
Typ
0.0100
[0.254]
0.030-0.040
[0.76-1.02]
R
0.005
[0.13]
Max
0.020
[0.51]
0.045
[1.14]
Detail A
Typical
Rotated 90°
0.027-0.033
[0.69-0.84]
0.025
[0.64]
Min
0.025
[0.64]
Min
0.031-0.037
[0.79-0.94]
0.053-0.059
[1.65-1.80]
0.006-0.012
[0.15-0.30]
0.019-0.025
[0.48-0.64]
0.065-0.071
[1.65-1.80]
0.021-0.027
[0.53-0.69]
Section B-B
Typical
S
0.007[0.18]
C
M
S
D-E, F-G
0.015[0.38]
C D-E, F-G
0.490-0530
[12.45-13.46]
0.078-0.095
[1.98-2.41]
0.013-0.021
[0.33-0.53]
0.004[0.10]
0.123-0.140
[3.12-3.56]
See detail A
-J-
-C-
0.400
[10.16]
( )
TYP
0.541-0.545
[13.74-13-84]
0.023-0.029
[0.58-0.74]
0.106-0.112
[2.69-2.84]
60
°
0.015
[0.38]
Base
Plane
-H-
Min Typ
S
32-Lead Plastic Leaded Chip Carrier (PLCC)
Order Number FM27C256VXXX
Package Number VA32A
Life Support Policy
Fairchild's products are not authorized for use as critical components in life support devices or systems without the express written
approval of the President of Fairchild Semiconductor Corporation. As used herein:
1. Life support devices or systems are devices or systems which,
(a) are intended for surgical implant into the body, or (b) support
or sustain life, and whose failure to perform, when properly
used in accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a significant
injury to the user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably ex-
pected to cause the failure of the life support device or system,
or to affect its safety or effectiveness.
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