W78C438C
Publication Release Date: July 1998
- 15 -
Revision A1
CRYSTAL
C1
C2
R
16 MHz
30P
30P
−
24 MHz
15P
15P
−
33 MHz
10P
10P
6.8K
40 MHz
5P
5P
6.8K
Above table shows the reference values for crystal applications.
Notes:
1. For C1, C2, R components refer to Figure A.
2. It is recommended that the crystals be replaced with oscillators for applications above 35 MHz.
PACKAGE DIMENSIONS
84-pin PLCC
2
A
H
D
D
e
b
E H
E
y
A
A
Seating Plane
D
G
E
11
84
75
1
12
32
33
53
54
74
Symbol
Min. Nom. Max.
Max.
Nom.
Min.
Dimension in inches
Dimension in mm
A
b
c
D
e
H
E
L
y
A
A
1
2
E
b
1
H
D
G
G
D
E
0.020
0.143
0.026
0.016
0.006
1.148
1.095
1.180
0.090
0.148
0.028
0.018
0.008
1.153
1.115
1.190
0.100
0.050
0.185
0.153
0.032
0.022
0.012
1.158
1.135
1.200
0.110
0.004
0.51
3.63
0.66
0.41
0.15
29.17
27.81
29.98
2.29
3.76
0.71
0.46
0.20
29.29
28.32
30.23
2.54
1.27
4.70
3.89
0.81
0.56
0.30
29.41
28.83
30.48
2.79
0.10
0.044
0.056
1.12
1.42
29.41
29.29
29.17
1.158
1.153
1.148
28.83
28.32
27.81
1.135
1.115
1.095
0
10
10
0
30.48
30.23
29.98
1.200
1.190
1.180
θ
on final visual inspection spec.
4. General appearance spec. should be based
3. Controlling dimension: Inches
protrusion/intrusion.
2. Dimension b1 does not include dambar
flash.
1. Dimension D & E do not include interlead
Notes:
