Rainbow Electronics W78C438C - Manual (Page 15)

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: