General Description
The SCG102A provides high precision phase lock loop
frequency translation for the telecommunication applications.
The SCG102A product generates LVPECL outputs from an
intrinsically low jitter, voltage controlled crystal oscillator.
SCG102A is well suited for use in line cards, service
termination cards and similar functions to provide reliable
reference, phase locked, synchronization for TDM, PDH, SONET
and SDH network equipment . The SCG102A provides a jitter
filtered, wander following output signal sychronized to a superior
Stratum or peer input reference signal.
LVPECL outputs may be put into the tri-state high impedance
condition for external testing purposes by asserting a high signal
to the Enable/Disable pin.
The SCG102A is a 3.3 Volt component that will typically draw
75mA. The SCG102A is designed to be used in applications that
require temperature rating of -40°C - 85° C. The SCG102A
package typical dimensions are 1.0” x 0.80” x 0.285” (See fig. 2
for maximum dimensions). Parts are assembled using high
temperature solder to withstand surface mount reflow process.
The SCG102A locks to any one of four pred-determined input
frequencies selected using the SELECT (A&B) lines (See Table
4). The output may be any single frequency from 77.76 MHz to
170 MHZ.
The SCG102A includes a lock detect alarm output. The PLL
control voltage is brought out through a 470 kΩ restistor and can
be used to determine when the pull range limits are reached.The
Functional Block Diagram
Figure 1
LD
(Pin 3)
470 kΩ
Monitor
(Pin 4)
OUT
Frequency
CLKIN
Loop
Filter
PECL
VCXO
(Pin 9)
(Pin 1)
Divider
COut
(Pin 10)
Frequency
10 kΩ
Divider
Select A
(Pin 12)
Microprocessor
Select B
(Pin 13)
Enable/Disable
10 kΩ
(Pin 8)
Absolute Maximum Rating
Table 1
Symbol
Vcc
Parameter
Minimum
-0.3
Nominal
Maximum
5.5
Units
Volts
Volts
°C
Notes
Power Supply Voltage
Input Voltage
V
I
Ts
-0.3
Vcc
Storage Temperature
-55
125
Data Sheet #: SG076 Page 2 of 8
Rev: 00
Date: 4/11/07
© Copyright 2007 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
CONNOR-WINFIELD [ CONNOR-WINFIELD CORPORATION ]
