NDK NW50M50LB Frequency timing and translation module Datasheet

Frequency Timing and Translation Modules
NEW
Frequency Controlled Crystal Oscillator (FCXO)
Stratum3 Module
Model Name NW50M50LA/B
n Main Application
SONET, SDH, FTTH, Communications equipment
n Features
l Two reference input frequencies in 9 steps from 8 kHz to 77.76 MHz.
l Compliant with Telecordia GR1244CORE, GR253.
l Hit-less reference switching.
l Frequency ramp control during reference switching.
* Module markings may be changed without notice.
l Simple hardware control for operational modes (Freerun, Locked to Ref 1 or 2 and
Holdover)
l Two output signals: one fixed at 8 kHz, one selectable (see specifications) up to 77.76 MHz.
n Specifications
Model
Item
Supply Voltage (VCC)
NW50M50LA
NW50M50LB
+5.0 V DC ±5%
Current Consumption
TCXO version 125 mA typ
OCXO version 525 mA typ turn on and 250 mA Steady state
0 to +70°C
Operating Temp. Range
2-CMOS
Input Levels
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
Input Reference Frequency (HMz)
Two CMOS outputs
Output Levels
OPT Sync Outputs: 12.96 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz or 77.76 MHz
Output Frequencies (MHz)
±4.6×10−6 max.
Free-run accuracy
0.1 Hz
PLL bandwidth
n List of Ordering Codes
n Control Functions
Output frequency (MHz)
CNTL B
0
0
1
1
Ordering Code
NW50M50LA-[
OTP Sync Output: One selectable up to 77.76 MHz
NW50M50LB-[
]-NSA3438A
]-NSA3438B
[
]: OTP Sync Output to order.
For example, in 19.44 MHz case, NW50M50LA-19.44M-NSA3438A
CNTL A
0
1
0
1
Mode of operation
FREE-RUN
Lock to REF 1
Lock to REF 2
Holdover
n Dimensions
50.8±0.3
mm
14.8max
1.6±0.1
5.08±0.3
5.08±0.3
1
18
50.8±0.3
9
40.64±0.3
10
0.51±0.3
0.51±0.3
Detail A
Detail A
5.29±0.3
40.64±0.3
18 − ø1.78±0.2
18 − ø1.0±0.13
PAD No.
Connection
#1
Holdover
#2
REF1
#3
REF2
#4
FREE-RUN
#5
GND
#6
ALARM OUT
#7
CNTL A
#8
CNTL B
#9
PLL UNLOCK
#10
GND
#11
SYNC OUT
#12
GND
#13
OPT Sync OUT
#14
GND
#15
EX REF 2
#16
GND
#17
EX REF 1
#18
+5V
co35_080205_NW50M50LA&B_e1
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