DFO20-KH20MHZCS3 datasheet, PDF

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DFO20-KH20MHZCS3: DescriptionHCMOS/TTL Output Clock Oscillator, 20MHz Nom; CategoryPassive components oscillator; File Size31KB，1 Pages; ManufacturerCTS; Environmental Compliance

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DFO20-KH20MHZCS3 Overview

HCMOS/TTL Output Clock Oscillator, 20MHz Nom

DFO20-KH20MHZCS3 Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	CTS
Reach Compliance Code	compliant
Ageing	3.5 PPM/15 YEAR
Frequency Adjustment - Mechanical	NO
frequency stability	0.28%
Frequency Stability - Voltage	0.01 ppm
input power	1.25 W
Manufacturer's serial number	DFO20-KH
Installation features	THROUGH HOLE MOUNT
Nominal operating frequency	20 MHz
Maximum operating temperature	70 °C
Minimum operating temperature	-20 °C
Oscillator type	HCMOS/TTL
Output load	2 TTL, 15 pF
Oven power supply voltage	5V
physical size	20.3mm x 20.3mm x 11.0mm
Maximum supply voltage	5.25 V
Minimum supply voltage	4.75 V
Nominal supply voltage	5 V
surface mount	NO
Preheating power	2.5 W
Maximum warm-up time	5 Minute

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FREQUENCY CONTROL PRODUCTS

STRATUM III & IIIE OCXO

TYPES DFO 20-KH (5 V) & DFO 20-LH (3.3 V)

FEATURES

10 to 25 MHz

20.3±0.1

7.62

Stratum IIIE compliant over -40 to 85°C

Stratum III compliant over -40 to 85°C

APPLICATIONS

Stratum III & Stratum IIIE

Function

Vcc

Output

GND

N.C.

15.24

DFO 20

0.4±0.1

H = 11mm

5.1

0.45

TYPE

Frequency Range

Standard frequencies

DFO 20-KH

DFO 20-LH

10 to 25 MHz

12.8, 16.384, 19.44 20 & 25 MHz

ELECTRICAL SPECIFICATIONS

supply voltage

supply current (no load) @ 25°C

supply current during warm up

output load

duty cycle @ 2.5 V

rise & fall times (10 to 90%)

high/low levels

SSB phase noise (1 Hz BW)

(typical @ 12.8MHz)

@ 1 Hz

@ 10 Hz

@ 100 Hz

@ 1 kHz

5V±5%

≤

250 mA

≤

500 mA

HCMOS 15 pF or 2 TTL

40/60...60/40 %

≤

10 ns

≥

4.5 V/≤ 0.5 V

-95 dBc/Hz

-120 dBc/Hz

-140 dBc/Hz

-145 dBc/Hz

≤

5 min @ 25°C ref @ 1 hr frequency

3.3 V ± 5 %

≤

300 mA

≤

800 mA

HCMOS 15 pF or 2 TTL

40/60...60/40 %

≤

10 ns

≥

2.7 V/≤ 0.5 V

-95 dBc/Hz

-120 dBc/Hz

-140 dBc/Hz

-145 dBc/Hz

≤

5 min @ 25°C ref @ 1 hr frequency

warm up time to reach

≤

1 x 10E-7

FREQUENCY STABILITY

type

temperature

range

model

code

detailed tolerances after 30 days of operation

stability versus:

temperature Vcc ± 5 %

ageing

≤

± 0.28

ppm

≤

±1x

10E-8

≤

±1x

10E-8

≤

± 2.5 x

10E-9

≤

± 3.5

ppm/

15 years

≤

± 3.5

ppm/

15 years

overall

stability

≤

± 4.6

ppm/

15 years

≤

± 4.6

ppm/

15 years

Holdover

stability

≤

± 0.37

ppm

≤

± 12 x

10E-9

24 hrs

drift

≤

±4x

10E-8

≤

±1x

10E-9

calibration

@ 25°C

≤

±5x

10E-7

≤

±5x

10E-7

Telcordia GR-1244 CORE Stratum III/IIIE or ITU-T G.813 option 1

-20 to 70°C CS3

-40 to 85°C ES3

all types

0 to 70°C BS3E

-40 to 85°C ES3E

DEFINITIONS

24 hours drift

24 hours holdover mode

GR-1244-CORE

Over full temperature range and Vcc ± 1 % (CS3 & ES3), and Vcc ± 0.25 % (BS3E)

ORDERING CODE

Example

type + option code + frequency + model code + voltage value

DFO 20-LH 12.8 MHz BS3E

TYPE

DFO 20 SIII

REVISION

CHECKED

DATE

.18.10.2007

PAGE

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