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