MercuryX™ IC OCXO | Telecom Networking and Stratum 3E

Issue: B, 7 May 2024

Specifications are subject to change without notice.

Copyright © 2023 to 2024 Rakon Limited. All rights reserved

Page

2 of 10

Contact Us

ROM1490X

1.0

Absolute Maximum Rating1

Parameter

Min.

Typ.

Max.

Unit

Test Condition / Description

a. Storage temperature

-55

125

°C

b. Supply voltage (Vcc)

-0.5

6

V

c. Power dissipation

2

W

d. Load

50

pF

2.0

Frequency Characteristics2

Parameter

Min.

Typ.

Max.

Unit

Test Condition / Description

e. Nominal frequency (Fn)

10 - 50

MHz

Standard frequencies 10, 19.2, 19.44, 20, 38.4,

38.88 & 40MHz

f. Frequency calibration

±0.2

ppm

At 25°C ± 2°C, at time of shipment, reference to

the nominal frequency

g. Reflow shift

±0.2

ppm

After 1 hour recovery at 25°C

h. Operating temperature range

-40

+95

°C

i. Frequency stability over

temperature (in still air)

±3

ppb

Reference to (FMAX + FMIN)/2

j. Frequency slope ΔF/ΔT in still air

±0.05

±0.1

ppb/°C

Temperature ramp ≤ 1°C/minute

k. All causes stability

±3

ppm

Including calibration, temperature, supply voltage

& load changes and 20 years life, reference to Fn

l. Supply voltage stability

±1

ppb

±1% variation, reference to frequency at 3.3V

m. Load sensitivity

±5

ppb

±10% variation, reference to frequency at 15pF

n. Warm-up time3

15

180

sec

o. Long term stability (Ageing)

±0.2

±0.5

±0.3

±2.5

ppb

ppm

Per day, after 30 days of continuous operation

First year

20 years

p. Acceleration sensitivity

0.9

ppb/g

Gamma vector of all three axes from 30Hz to

1500Hz

q. Holdover4, 5, 6

6

8

hours

Constant temperature condition

3

6

hours

Temperature change of +1°C or -1°C after

holdover starts; temperature rate ±0.5°C/minute

1.5

3.5

hours

Temperature change of +2.8°C or -2.8°C after

holdover starts; temperature rate ±0.5°C/minute

1

Operating beyond this limit may result in change or permanent damage to the device.

2

The characteristics of the component may be temporarily affected by the processes of assembly and soldering. The frequency specifications apply after 48

hours of continuous operation after assembly. Nominal conditions (T=25°C, Vcc=3.3V, Cload=15pF) apply unless otherwise stated.

3

Time needed for frequency to be within ±20 ppb reference to frequency after 1 hour, at 25°C. Parameter is frequency, assembly and operating history

dependent.

4

Referenced to the midpoint between minimum and maximum frequency value over the specified temperature range. The temperature varied at a maximum

of 1°C per minute.

5

Parts should be shielded from drafts causing unexpected thermal gradients. Temperature changes due to ambient air currents on the oscillator can lead to

short-term frequency drift

6

No supply voltage or load changes, after 30 days of continuous operation.