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EURO

QUARTZ

EM57K ULTRA-LOW CURRENT TCXO

HCMOS 7 x 5 x 2.5mm SMD

Highly stable CMOS TCXO with ultra-low supply current

Miniaturized 7 x 5mm SMD package

Consumes less than 4mA at 20.0MHz with 3.3V supply

Low phase noise

RoHS compliant

DESCRIPTION

EM57K TCXOs and VCTCXOs are packaged in a 7 x 5 x 2.5mm

ceramic SMD package. The part offers the stability of a TCXO and the

design convenience of HCMOS output with ultra-low current

consumption.

SPECIFICATION

Product Code

TCXO:

VCTCXO:

EM57K

VEM57K

12.8MHz to 26.0MHz

HCMOS

<±2.0ppm at +25°±2°C

12.8, 13.0, 14.4, 15.36, 16.0,

16.384, 16.8, 19.2, 19.44,

19.68, 20.0 and 26.0MHz

(

OUTLINES AND DIMENSIONS

Frequency Range:

Output Waveform:

Initial Calibration Tolerance:

Standard Frequencies:

Operating Temperature Range:

Frequency Stability

vs. Temperature

vs. Ageing:

vs. Voltage Change:

vs. Load Change:

vs. Reflow (SMD type):

Supply Voltage:

Current Consumption:

Output Logic Levels:

Rise and Fall Times:

Duty Cycle:

Start-up Time:

Output Load:

Fanout (drive capability):

RMS Period Jitter:

±1.0 ppm max. first year

±1.0 ppm max. ±10% change

±0.3 ppm max. ±10% change

±1.0ppm max. for one reflow

(

)

+2.8, 3.0 or 3.3 Volts

RoHS Status:

Packaging:

CURRENT CONSUMPTION

Frequency

+2.8V

12.800MHz

13.000MHz

14.400MHz

16.384MHz

19.200MHz

19.440MHz

20.000MHz

26.000MHz

2.3mA

2.5mA

2.6mA

2.8mA

3.2mA

3.6mA

typ.

4ns typical with 15pF load

50%±5%

5ms typical, 10ms max.

15pF

12mA typical, 17mA max.

(at TTL level)

3ps max. (1 Sigma, 1000

samples; capacitive coupling

between Vdd and Ground).

RoHS compliant and pB free

16mm tape, 8mm pitch

1000 pieces per reel.

Chamfered pad is Pad 1. Count counter-clockwise when looking at top

view. Count clockwise from bottom view.

0.01mF capacitor is built-in.

VEM57K VOLTAGE CONTROL SPECIFICATION

Control Voltage:

Slope Polarity:

±5 to ±12ppm for +1.5 ±1.5 Volts

Positive

Input Voltage

+3.0V

2.4mA

2.6mA

2.8mA

3.0mA

3.3mA

3.4mA

3.8mA

typ.

+3.3V

2.6mA

2.8mA

3.1mA

3.2mA

3.6mA

3.7mA

4.1mA

typ.

SSB PHASE NOISE at 25°C

Offset

Part =

VEM57K30

at 13.000MHz

(dBc/Hz)

100Hz

-80

1kHz

-110

10kHz

-130

100kHz

-135

1MHz

-142

PART NUMBER FORMAT

Example:

FREQUENCY STABILITY OVER TEMPERATURE

Stability (ppm)

0 ~ +50

-10 ~ +60

Temp.

Range (°C)

-20 ~ +70

-30 ~ +75

-40 ~ +85

±1.0

ASK

±2.0

±2.5

±3.0

ASK

±4.0

ASK

±5.0

EM57K33-20.000-2.5/-30+75

Series Description

TCXO = EM57K

VCTCXO = VEM57K

Supply Voltage

28=2.8V, 30=3.0V, 33=3.3VDC

Frequency (MHz)

Stability over OTR (±ppm)

Operating Temperature Range (OTR)

Lower and upper limits (°C)

= available, x = not available, ASK = call Technical Sales

EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE

Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk

www.euroquartz.co.uk