
1.7  Maximum Fanouts
Introduction
STD130
1-24
Samsung ASIC
1.7
Maximum Fanouts
1.7.1 INTERNAL MACROCELLS
The maximum fanouts for STD130
primitive cells are tabulated in Table
1-7 and Appendix C. Note that these
fanout limitation values are calcu-
lated when the rise and fall times of
the input signal is 0.155ns. Depend-
ing on the rise and fall times, the
maximum fanout limitations can be
varied case by case.
In the following table the maximum
fanout values for all pins of STD130
internal macrocells are listed.
Table 1-7.
of Internal Macrocells
(When input t
R
/t
F
 = 0.155ns, one
fanout (SL) = 0.00517pF, wire load =
0.048pF, 0.048pF is correspondent
with 300
μ
m wire)
Cell
Name
Pin
ad2
Y
ad2b
Y
ad2bd2
Y
ad2bd4
Y
ad2bd8
Y
ad2d2
Y
ad2d4
Y
ad2d8
Y
ad3
Y
ad3d2
Y
ad3d4
Y
ad4
Y
ad4d2
Y
ad4d4
Y
ad5
Y
ad5d2
Y
ad5d4
Y
ao21
Y
ao211
Y
ao2111
Y
ao2111d2
Y
ao211d2
Y
ao211d4
Y
ao21d2
Y
ao21d4
Y
ao22
Y
ao221
Y
ao221d2
Y
ao221d4
Y
ao222
Y
ao2222
Y
ao2222d2
Y
ao2222d4
Y
ao222a
Y
ao222d2
Y
ao222d4
Y
ao22a
Y
ao22d2
Y
ao22d4
Y
Maximum Fanouts
Output
Maximum
Fanouts
51
52
106
209
417
104
208
417
51
104
205
51
103
205
25
51
212
24
15
10
103
31
211
48
210
24
14
104
209
14
9
104
210
22
103
209
24
48
209
ao31
ao311
ao3111
ao31d2
ao31d4
ao32
ao321
ao322
ao32d2
ao33
ao331
ao332
busholder
cglp
cglpd2
cglpd4
fa
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
23
14
9
47
209
23
13
13
104
20
13
13
10000
GCK
GCK
GCK
S
CO
S
CO
Q
QN
Q
QN
Q
QN
Q
QN
Q
Q
Q
QN
Q
QN
Q
Q
Q
QN
Q
QN
Q
QN
Q
QN
Q
Q
Q
QN
Q
QN
Q
Q
Q
QN
Q
QN
Q
QN
Q
QN
Q
Q
Q
QN
52
105
209
52
51
105
104
52
52
104
103
51
51
104
103
51
104
52
51
104
103
52
104
51
51
104
104
52
51
104
102
52
105
51
51
106
103
51
104
51
51
104
104
51
51
104
104
51
104
51
51
fad2
fd1
fd1d2
fd1cs
fd1csd2
fd1q
fd1qd2
fd1s
fd1sd2
fd1sq
fd1sqd2
fd2
fd2d2
fd2cs
fd2csd2
fd2q
fd2qd2
fd2s
fd2sd2
fd2sq
fd2sqd2
fd3
fd3d2
fd3cs
fd3csd2
fd3q
fd3qd2
fd3s
Cell
Name
Output
Pin
Maximum
Fanouts