Model Name NW50M50LA/B

Frequency Controlled Crystal Oscillator (FCXO)

Stratum3 Module

co35_080205_NW50M50LA&B_e1

Current Consumption

Operating Temp. Range

Input Levels

Input Reference Frequency (HMz)

Output Levels

Output Frequencies (MHz)

Free-run accuracy

PLL bandwidth

Item

Model

* Module markings may be changed without notice.

CNTL B

CNTL A

Mode of operation

0

0

1

1

0

1

0

1

FREE-RUN

Lock to REF 1

Lock to REF 2

Holdover

SONET, SDH, FTTH, Communications equipment

Frequency Timing and Translation Modules

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.

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.

+5.0 V DC ±5%

0 to +70°C

2-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

Two CMOS outputs

OPT Sync Outputs: 12.96 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz or 77.76 MHz

0.1 Hz

mm

PAD No.

#1

#2

#3

#4

#5

#6

#7

#8

#9

#10

#11

#12

#13

#14

#15

#16

#17

#18

Connection

Holdover

REF1

REF2

FREE-RUN

GND

ALARM OUT

CNTL A

CNTL B

PLL UNLOCK

GND

SYNC OUT

GND

OPT Sync OUT

GND

EX REF 2

GND

EX REF 1

+5V

NW50M50LA

TCXO version 125 mA typ

NW50M50LB

OCXO version 525 mA typ turn on and 250 mA Steady state

50.8±0.3

1.6±0.1

40.64±0.3

18 − ø1.0±0.13

5.08±0.3

5.08±0.3

0.51±0.3

40.64±0.3

0.51±0.3

5.29±0.3

14.8max

50.8±0.3

Detail A

Detail A

910

118

18 − ø1.78±0.2

NEW

Output frequency (MHz)

OTP Sync Output: One selectable up to 77.76 MHz

Ordering Code

NW50M50LA-[

]-NSA3438A

NW50M50LB-[

]-NSA3438B

[

]: OTP Sync Output to order.

For example, in 19.44 MHz case, NW50M50LA-19.44M-NSA3438A