NW50M50LA-25.92M-NSA3438A

Frequency Timing and Translation Modules Model Name NW50M50LA/B n Main Application SONET, SDH, FTTH, Communications equipment NEW Frequency Controlled Crystal Oscillator (FCXO) Stratum3 Module 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. 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. * Module markings may be changed without notice. n Specifications Item Supply Voltage (VCC) Current Consumption Operating Temp. Range Input Levels Input Reference Frequency (HMz) Output Levels Output Frequencies (MHz) Free-run accuracy PLL bandwidth Model NW50M50LA +5.0 V DC ±5% TCXO version 125 mA typ OCXO version 525 mA typ turn on and 250 mA Steady state 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 ±4.6×10−6 max. 0.1 Hz NW50M50LB n List of Ordering Codes Output frequency (MHz) Ordering Code ]-NSA3438A ]-NSA3438B NW50M50LA-[ OTP Sync Output: One selectable up to 77.76 MHz NW50M50LB-[ [ ]: OTP Sync Output to order. For example, in 19.44 MHz case, NW50M50LA-19.44M-NSA3438A n Control Functions CNTL B 0 0 1 1 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 5.08±0.3 1 18 14.8max 1.6±0.1 5.08±0.3 mm PAD No. #1 #2 #3 #4 #5 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 50.8±0.3 40.64±0.3 #6 #7 #8 #9 9 10 0.51±0.3 #10 #11 #12 #13 0.51±0.3 Detail A Detail A #14 #15 #16 #17 5.29±0.3 40.64±0.3 18 − ø1.78±0.2 18 − ø1.0±0.13 #18 co35_080205_NW50M50LA&B_e1