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CM66
Brief Description:
1. Clock module with built-in  receiver, supporting GPS/Beidou, 2 frequency output, holdover better than  ±3.0us/24h (△T=±5℃);
2. Mainly applied in power grid, clock reference, base station and high precise server etc.

general model:CM66G-D129-10.00M-

 

Feature:
With an internal GPS/dual-module receiver, high integration, low phase noise frequency
output by 2 pins,
applied to a relatively stable temperature environment.
 

 

 
 
Internal GPS receiver features
 

Parameters   Remark
Type Auto Position Lock  
 
 
 
Applicable to  CM66G and H series
Number of Channels 50
Frequency Band L1(1575,42MHz)
Tracking Code C/A Code
Tracking Capability 12 Satellites
 
Sensitivity
Tracking & Navigation -162dBm
Hot start  -157dBm
Cold start  -148dBm
Antenna INPUT SMA-KE

 

 

 

 
Internal Dual-module receiver features
 

Parameters   Remark
Type Auto Position  
 
 
Applicable to CM66K and L series
Frequency band GPS L1(1575.42Mhz)/
BD2 B1(1561.098MHz)
Tracking capability 12 Satellites
Sensitivity Tracking  -159dBm
Capturing  -144dBm
Antenna INPUT SMA-KE
 
 
State input
Parameters Min. Typ. Max. Unit. Test Condition
Lock 2.7     V <5mA Load
Holdover     0.4 V <5mA Load
Connector Pin 8  
 
 
 
GPS
1PPS
Reference output
Parameters Min. Typ. Max. Unit. Test Condition
Waveform HCMOS  
High-level Output Voltage 2.7     V  
50Ω
Low-level Output Voltage     0.4 V
Pulse Width   100   ms
Connector Pin 10  
 
State input Parameters Min. Typ. Max. Unit. Test Condition
Lock 2.7     V <5mA Load
Holdover     0.4 V <5mA Load
Connector Pin 5  
 
 
 
Holdover
Parameters Min. Typ. Max. Unit. Test Condition
24 hrs -1.5   1.5 μs △T=±2℃, 24 hours holdover after turning on 7 days and GPS lock 3 days
 
 
 
Supply voltage
Parameters Min. Typ. Max. Unit. Test Condition
Supply voltage 4.75 5.0 5.25 V  
Current consumption     2000 mA During Warm-up
    1000 mA During steady state operation  @25℃
Ac ripple     50 mA 10Hz ~ 1MHz
Connector Pin 3  
 
 
 
 
 
 
 
RF output 1
Parameters Min. Typ. Max. Unit. Test Condition
Nominal Frequency 19.6608 MHz  
Waveform HCMOS  
High-level Output Voltage 2.7     V <5mA Load
Low-level Output Voltage     0.4 V <5mA Load
Rise/Fall Time     8 ns <5mA Load
Duty Cycle 45 50 55 % <5mA Load
Accuracy -1   +1 E-12 24 hrs average when locked to 1 PPS
Short-term Stability   2   E-11 Temperature stability, no EMI/EMC or other interference, test after power on for 1 hour ref. to 25℃; 1s, using PN9000 equipment
Aging Tolerance Per Day -2   +2 E-10 Vcc, TA constant measurement referenced to frequency observed with TA=25℃, Vcc=5.0V, in FREE RUN condition and after 30 days of operation.
Aging Tolerance Per Year -1   +1 E-8
 
 
 
Phase noise
  -90   dBc/Hz @10Hz offset
  -120   dBc/Hz @100Hz offset
  -140   dBc/Hz @1KHz offset
  -150   dBc/Hz @10KHz offset
  -155   dBc/Hz @100KHz offset
  -155   dBc/Hz @1MHz offset
Connector Pin 2  
 
 
 
 
 
 
 
 
RF output 2
Parameters Min. Typ. Max. Unit. Test Condition
Nominal Frequency 61.44 MHz  
Waveform Sine wave  
Amplitude 6   10 dBm  
Load 50 Ω  
Harmonic     -30 dBc  
Stray     -60 dBc  
Accuracy -1   +1 E-12 24 hours average when lock to 1 PPS
Short-term stability     2 E-11 Temperature stability, no EMI/EMC or other interference, test after power on for 1 hour ref. to 25℃; 1s, using PN9000 equipment
Aging Tolerance Per Day -2   +2 E-10 Vcc, TA constant measurement referenced to frequency observed with TA=25℃, Vcc=5.0V, in FREE RUN condition and after 30 days of operation.
Aging Tolerance Per Year -1   +1 E-8
 
 
 
Phase noise
  -80   dBc/Hz @10Hz offset
  -110   dBc/Hz @100Hz offset
  -130   dBc/Hz @1KHz offset
  -145   dBc/Hz @10KHz offset
  -150   dBc/Hz @100KHz offset
  -155   dBc/Hz @1MHz offset
Connector Pin 14  
 
 
 
PP2S
Output waveform feature
Parameters Min. Typ. Max. Unit. Test Condition
Waveform HCMOS  
High-level Input Voltage 2.7     V  
50Ω
Low-level Input Voltage     0.4 V
Pulse Width   10   μs
Phase Synchronous with 19.6608MHz falling edge in even second of 1PPS  
Connector Pin 12  
 
 
Serial Interfaces
Parameters Min. Typ. Max. Unit. Test Condition
Rx High-level Input Voltage 2.7     V  
Rx Low-level Input Voltage     0.4 V  
Tx High-level Output Voltage 2.7     V  
Tx Low-level Output Voltage     0.4 V  
Data format NMEA-0183  
Serial protocol 9600-N-8-1  
Connector Pin 6 and Pin 7  
 
 
 
Environmental Compliance
Parameters Conditions
Operating temperature -20℃~ 75℃
Storage temperature -55℃~ 105℃
Storage humidity 30% ~ 80%
ESD level Human Body Model, class 2: 2000V to 4000V; ANSI/ESDA/JEDEC JS-001-2-2010.
Human Body Model, class B: 200V to 400V; ANSI/ESDA/JEDEC JS-001-2010.
Moisture Sensitivity Level Not humidity sensitive
 
Vibration
Test Condition:
Amplitude: 0.75mm;acceleration: 10g;10Hz~500Hz; a cycle per 30min, test for 2 hours
in 3 directions (3 directions: X, Y and Z), IEC 68-2-06 Test Fc.
Shock
50g;11ms;half sine wave (3 directions: X, Y and Z), IEC 68-2-27 TestEa/Severity 50A.

Mechanical Structure (mm)












































Note 1: Tolerance ±0.2mm without marking
Note 2: Referential weight 82g

PIN DEFINITION
PIN NAME DESCRIBTION
1 GPS_BCKP GPS receiver backup battery, supply 1.4V to 3.6V, if not use, please connect to GND
2 19.6608MHz output 19.6608MHz OCXO output
3 VCC Supply voltage 4.75V~5.25V
5 State output State output. Output high level when the CM is locked and stable, others low level
6 RX input Asynchronous serial data input , 9600-N-8-1.
7 TX output Asynchronous serial data output , 9600-N-8-1.
8 State
INPUT
H: Lock The work state is set to normal operation when the state input is high
L: Holdover The work state is set to hold over when the state input is low
10 GPS 1PPS Input Clock module PP1S output
12 PP2S Clock module PP2S output
14 61.44MHz output 61.44MH output
4、9、11、13 GND GND
Package (mm)
Detail Download Format Download
Recommendation
Clock module, wide temperature ranges, holdover of ±1.25us/24h(△T=±10℃)
Clcok module, low height, high holdover of ±1.5us/24h(△T=±5℃)
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