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

DESCRIPTION

For applications with high operating temperatures such as downhole

instrumentation, rotary shaft sensors and underground boring tools.

Supply Voltage:

+3.3 ±10%

Calibration Tolerance:

±50ppm or tighter as reqd.

Frequency Stability

25° ~ +150°C:

±100ppm

25° ~ +175°C:

±150ppm

25° ~ +200°C:

±175ppm

Total Tolerance:

±200ppm for 25° to 200°C

Supply Current (Typical)

24MHz:

3.0mA

32MHz:

5.0mA

50MHz:

6.0mA

Output Load (CMOS):

15pF

Start-up Time:

5ms max.

Rise/Fall Time:

10ns typical

Duty Cycle:

60/40%

Ageing first year:

±5ppm max. at 25°C

Ageing:

±100ppm max. at 200°C

Shock Survival

Standard:

5,000g, 0.3ms, ½ sine

HG version:

30,000g, 0.3ms, ½ sine

Vibration Survival:

20g, 10~2000Hz swept sine

Operating Temp. Range:

-55°C to 225°C

SPECIFICATION

FEATURES

High temperature operation up to 200°C

Excellent stability over temperature

High shock resistance

CMOS output

Through-hole leaded package - reduces mounting stress

Robust lead attach-eutectic brazing process

Gold plated Kovar leads

LHTAT oscillators have two enable/disable options, designated E &

N. The E version has a tristate output and stops oscillating internally

when the output is placed in a high Z state. The N version does not

have the control pin, Pin1, connected internally so there is no

enable/disable function with this option.

LHTAT OSCILLATORS

HOW TO ORDER LHTAT OSCILLATORS

LHTAT

4

A

E

SM1

-

20.0M

–

/

–

/ 200 /

H

Enable/Disable

option E or N

Terminations

Blank = SM1 = Gold plated

SM5 = Solder dipped

(lead free)

Frequency

M = MHz

k = kHz

Calibration

Tolerance

at 25°C

(in ±ppm)

Total

Frequency

Tolerance

(±ppm)

Temp. Range

H = 25° to 200°C

S = customer

specified temp.

range

Leaded High Temperature/High Shock

Shock Level

A = 5000g

B = 10000g

C = 20000g

D = 30000g

ENABLE/DISABLE OPTIONS (E/N)

Supply Voltage

4 = 3.3V

Frequency

Stability

over

temperature

range

(in ±ppm)

OUTLINE & DIMENSIONS

320kHz to 50MHz

ENABLE/DISABLE OPTION E - FUNCTION TABLE

Enable (Pin1 High*)

Disable (Pin 1 Low)

Output

Frequency Output

High Z state

Oscillator

Oscillates

Stops

Current

Normal

Very low

PACKAGING

LHTAT oscillators are supplied tube packed.

Supply Voltage:

-0.5V to +4.0V

Maximum Process Temperature:

260°C for 20 seconds

Storage Temperature:

-55° to +125°C

ABSOLUTE MAXIMUM RATINGS

50

/

175

/

-

/

H

OR

Calibration

Tolerance

at 25°C

(in ±ppm)

Total

Frequency

Tolerance

(±ppm)

Temp. Range

H = 25° to 200°C

S = customer

specified temp.

range

Frequency

Stability

over temp.

range

(in ±ppm)