PE76D / PE78D Series 2.5 V

PECL Clock Oscillators

January 2008

www.pletronics.com

425-776-1880

6

Mechanical:

Inches

mm

B

0.356 +

_0.005

9.04 +

_0.13

C

0.126 +

_0.005

3.21 +

_0.13

D

0.324 +

_0.005

8.23 +

_0.13

F

1

0.050

1.27

Label:

laser marked lettering

FR4 PCB Base:

Solder masked

All via holes tented on bottom

Copper Clad 670 µinch (17 µm)

Nickel plated 118 µinch (3 µm)

Gold plated 0.8 µinch (0.02 µm)

Typical thicknesses

Pin 3 Ground plane is typical

Not to scale

G

1

0.040

1.02

H

1

0.059

1.50

I

1

0.020

0.51

J

1

0.040

1.02

K

1

0.100

2.54

L

1

0.062

1.57

Pad

Function

Note

76

78

1

2

Output

Enable/Disable

When this pad is not connected the oscillator shall operate.

When this pad is <0.30 volts, the output will be inhibited (high impedance state.)

Recommend connecting this pad to V

2

1

No connect

There is no internal connection to this pad

3

Ground (GND)

4

Output

Both outputs must be terminated and biased for proper operation. The ideal

termination is 50 ohms connected to 2.0V below the Supply Voltage.

5

Output*

6

Supply Voltage

(V

Recommend connecting appropriate power supply bypass capacitors as close as

possible.

Layout and application information

Recommend connecting Pad 1 and Pad 2 together to permit the design to accept both Enable/Disable

input pad versions to be used

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.