NEW
Frequency Timing and Translation Modules
Frequency Controlled Crystal Oscillator (FCXO)
Model Name NW34M25WA
Clock Generator Modules
Main Application
n
SONET, SDH, FTTH, Communications equipment
Features
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l Dual reference inputs, LVPECL and CMOS outputs
l Simple hardware control for operational mode
l Automatic Free-run upon loss of input reference
l Lock acquisition time < 1 second
* Module markings may be changed without notice.
Specifications
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Model
NW34M25WA
Item
Supply Voltage (VCC
Current Consumption
Operating Temp. Range
Input Level
Input Reference Frequency
Output Levels
Output Frequencies (MHz)
Free-run accuracy (at 25°C)
Capture / pull-in range
+3.3 V DC 5ꢀ
)
200 mA typ
0 to +70°C
2-CMOS
19.44 MHz*
2(3) LVPECL and 1 CMOS
77.76 (LVPECL1, CMOS) and 155.52 (LVPECL0)*
−6
20ꢁ10 max.
−6
25 ꢁ10 min.
(*other frequencies are available)
List of Ordering Codes
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Output frequencies (MHz)
Input reference
Ordering Code
frequency (MHz)
19.44
LVPECL 0
155.52
LVPECL 1
77.76
LVPECL 2
High-Z
CMOS
77.76
NW34M25WA-155.52M-NSA3436A
Dimensions
Control Functions
n
n
Control 1
Control 2
Mode of operation
Lock to Ref A
PAD No. Connection
mm
0
0
1
1
0
1
0
1
#1
Alarm Output
Ref A Input
DNC
Lock to Ref B
#2
Forced Free-run
Outputs are Tri-stated
#3
#4
#5
#6
Ref B Input
OPT (LVPECL 2+)
OPT (LVPECL 2–)
VCC
25.4 0.3
#7
#8
#9
GND
34.3 0.3
LVPECL 1+
LVPECL 1–
LVPECL 0+
LVPECL 0–
GND
VCC
CMOS Output
DNC
DNC
DNC
Control 1
Control 2
#10
#11
#12
#13
#14
#15
#16
#17
#18
#19
#20
4.8max
#1 #2 #3 #4 #5 #6 #7 #8 #9 #10
20.4 0.2
2.54 0.2
#20 #19 #18 #17 #16 #15 #14 #13 #12 #11
1.8 0.2
2.54 0.15
DNC : Do not connect
co34_080205_NW34M25WA_e1
