SM55M Series 1.8 V
CMOS Clock Oscillators
April 2010
Mechanical:
Inches
mm
A
0.197 +_0.006
5.00 +_0.15
B
C
0.126 +_0.006
0.045 +_0.004
3.20 +_0.15
1.15 +_0.10
1.23
D1 0.048
E1 0.100
2.54
F1
0.004
0.10
G1 0.050
H1 0.055
1.27
1.40
I1
0.024
0.004
0.60
J1
0.10R
0.020R
Not to Scale
Contacts :
K1 0.008
1 Typical dimensions
Gold 11.8 to 39.4 µinches (0.3 to 1.0 µm) over Nickel 50 to 350 µinches (1.27 to 8.89 µm)
Pad
Function
Note
1
Output
When this pad is not connected the oscillator shall operate.
Enable/Disable
When this pad is logic low the output will be inhibited (high impedance state.)
Recommend connecting this pad to VCC if the oscillator is to be always on.
2
3
4
Ground (GND)
Output
Supply Voltage
(VCC)
Recommend connecting appropriate power supply bypass capacitors as close as
possible.
Layout and application information
For Optimum Jitter Performance, Pletronics recommends:
•
•
•
•
a ground plane under the device
no large transient signals (both current and voltage) should be routed under the device
do not layout near a large magnetic field such as a high frequency switching power supply
do not place near piezoelectric buzzers or mechanical fans.
www.pletronics.com
425-776-1880
6
PLETRONICS [ PLETRONICS, INC. ]
