NEW
Frequency Timing and Translation Modules
Frequency Controlled Crystal Oscillator (FCXO)
Model Name NW36M25LA
Advanced Stratum3 Module
Main Application
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SONET, SDH, FTTH, Communications equipment
Features
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l Four inputs, Stratum 3 solution for the Synchronous Timing Source in SONET/SDH
network elements.
l
Accepts 4 reference inputs in 9 steps from 8 kHz to 77.76 MHz (See specification below)
l Compliant with Telecordia GR1244CORE, GR253 and ITU-T G.812 / G.813.
l Hit-less reference switching.
* Module markings may be changed without notice.
l Frequency ramp control during reference switching.
l Supports Master / Slave operation
l Three output signals: one selectable (See specification below) up to 77.76 MHz, one
fixed at 8 kHz and 1.544 MHz or 2.048 MHz BITS output.
Specifications
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Model
NW36M25LA
Item
Supply Voltage (VCC
Current Consumption
Operating Temp. Range
Input Levels
+3.3 V DC 5ꢀ
)
150 mA typ
0 to +70°C
4-CMOS
8 kHz, 1.544 MHz, 2.048 MHz, 12.96 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz or 77.76 MHz
Three CMOS outputs
Input Reference Frequency
Output Levels
Output Frequency 1
Output Frequency 2,3
Free-run accuracy
Holdover accuracy
PLL bandwidth (user programmable)
OUTPUT 1: 12.96 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz or 77.76 MHz
M/S_OUT: 8 kHz, BITS_CLK: 1.544 MHz or 2.048 MHz
−6
4.6ꢁ10 max.
−6
0.37ꢁ10 max.
0.025 Hz to 1.6 Hz
List of Ordering Codes
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[
]: OUTPUT1 frequency to order.
Output frequency (MHz)
OUTPUT 1: One selectable up to 77.76 MHz
Ordering Code
NW36M25LA-[ ]-NSA3437A
For example, in 19.44 MHz case,
NW36M25LA-19.44M-NSA3437A
Dimensions
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36.83 0.5
mm
PAD No. Connection
PAD No. Connection
28
15
14
#1
LOS
LOL
#15
#16
#17
#18
#19
#20
#21
#22
#33
#24
#25
#26
#27
#28
NC
T1/E1
#2
#3
#4
M/S REF
REF1
HOLD/GOOD
TDO
TCK
GND
SPI_ENBL
SPI_IN
VCC
SPI_ENBL
RESET
SPI_OUT
SPI_INT
MASTER SELECT
25.4 0.5
6.0max
21.59 0.3
#5
#6
REF2
REF3
#7
#8
REF4
TDI
1
3.18 0.3
#9
TMS
TRST
BITS_CLK
M/S_OUT
OUTPUT1
NC
#10
#11
#12
#13
#14
1.0 0.1
2.54 0.2
0.457 0.13
33.02 0.2
co33_080205_NW36M25LA_e1
