DAPU CM55F-K129 10MHZ  CLOCK MODULE  5VDC   HCMOS  1PPS (INPUT AND OUTPUT)
SIZE: 51mmX51mmX13mm

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*CLOCK MODULE:
The clock module can achieve the performance of atomic clock based on DAPU's algorithm (over temperature and aging) and DAPU's high performance OCXO.

. Supports multiple reference input clocks: GPS, IEEE1588 or other clock sources)

. High holdover performance: 1.5US for 24 hours

. Quick Disciplined

It is used in LTE, LTE-Advanced, 5G base stations, digital video broadcast and general timing and Instrumentatio

CM55

Brief Description:
1. Small size, low height, holdover better than ±1.5us/24h(△T=±5℃);
2. Widely applied in power grid, clock reference, base station, high precise server etc.


Feature:
1.5μs holdover for 24 hrs, ultra thin, high cost effective, applied to a relatively stable temperature environment
 
 

 

 
1 PPS
Reference input

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

10

 

 

μs

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 8

 

 

 

 

 

 

 
 
 
 
 
RF Output

Parameters

Min.

Typ.

Max.

Unit.

Test Condition

Frequency

 

10

 

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 hours average when lock to 1 PPS

Short-term stability

 

2

 

E-11

Temperature stability, no EMI/EMC or other interference, test after power 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=2525℃, Vcc=5.0V, in FREE RUN condition and after 30 days of operation.

Aging Tolerance Per Year

-1

 

+1

E-8

 
 
 
Phase noise

 

-118

 

dBc/Hz

@10Hz offset

 

-138

 

dBc/Hz

@100Hz offset

 

-148

 

dBc/Hz

@1KHz offset

 

-150

 

dBc/Hz

@10KHz offset

 

-150

 

dBc/Hz

@100KHz offset

 

-150

 

dBc/Hz

@1MHz offset

Connector

Pin 14

 

Holdover Capability

Holdover Time

Min.

Typ.

Max.

Unit.

Test Condition

24 hours

-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

 

 

1400

mA

During warm-up

 

 

600

mA

During steady state operation @25℃

AC ripple

 

 

50

mA

10Hz ~ 1MHz

Connector

Pin 3

 

 

 
1PPS
Output Waveform Features

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

 

10

 

μs

Connector

Pin 12

 

 

 

State intput

Parameters

Min.

Typ.

Max.

Typ.

Test Condition

Lock

2.7

 

 

V

<5mA Load

Holdover

 

 

0.4

V

<5mA Load

Connector

Pin 5

 

 

 

 
 
Serial Interfaces

Parameters

Min.

Typ.

Max.

Typ.

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

μs

 

Serial protocol

9600-N-8-1

 

Connector

Pin 6 and Pin 7

 

 

 

 

 

Environment
Compliance

Parameter

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 51.4g

 

 

 

 

 

 

 

 

 

 

 

PIN DEFINITION

PIN

NAME

DESCRIBTION

3

VCC

Power supply input, 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

1PPS INPUT

1PPS reference input

12

1PPS OUTPUT

Clock module 1PPS output

14

10MHz OUTPUT

10MHz OCXO frequency output

1、2、9

NC

hang in the air

4、11、13

GND

GND