SM7645DEV Datasheet, PDF (6/9 Pages) Pletronics, Inc. – 3.3 V CMOS Clock Oscillators

Mechanical:
Label:
Laser marked on the ceramic
package metal cover
SM76D Series 3.3 V
CMOS Clock Oscillators
March 2008
FR4 PCB Base:
Solder masked
All via holes tented on bottom
Copper Clad ½ oz. Typical
Gold plated 0.02 μinch (0.5 μm)
Pin 3 Ground plane is typical
Not to scale
1 _{Typical dimension}
Inches
mm
A 0.324 +_0.003 8.23 +_0.07
B 0.356 +_0.005 9.04 +_0.13
C 0.135 +_0.005 3.43 +_0.13
D¹ 0.062
1.57
E¹ 0.050
1.27
F¹ 0.050
1.27
G¹ 0.059
1.50
H¹ 0.020
0.51
J¹ 0.040
1.02
K¹ 0.200
5.08
Pad Function
1 Output
Enable/Disable
2 Ground (GND)
3 Output
4 Supply Voltage
(V_CC)
Note
When this pad is not connected the oscillator shall operate.
When this pad is logic low the output will be inhibited (high impedance state.)
Recommend connecting this pad to V_CC if the oscillator is to be always on.
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
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