SM76H Series 2.5 V
CMOS Clock Oscillators
March 2008
Mechanical:
Inches
mm
A
B
C
0.324 +_0.003
0.356 +_0.005
0.135 +_0.005
8.23 +_0.07
9.04 +_0.13
3.43 +_0.13
1.57
D1 0.062
E1 0.050
1.27
F1
0.050
1.27
Label:
Laser marked on the ceramic
package metal cover
FR4 PCB Base:
Solder masked
All via holes tented on bottom
Copper Clad ½ oz. Typical
Gold plated 0.02 μinch (0.5 μm)
G1 0.059
H1 0.020
1.50
0.51
J1
K1 0.200
0.040
1.02
Pin 3 Ground plane is typical
5.08
Not to scale
1 Typical dimension
Pad
Function
Note
When this pad is not connected the oscillator shall operate.
1
Output
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. ]
