|
| SPK ELECTRONICS CO., LTD. |
|
Item Number:
|
Oscillator characteristics |
|
Product Name:
|
characteristics |
|
Description:
|
| TECHNICAL
TERMS |
 |
| The following technical
terms are generally used for crystal clock oscillators. |
| Nominal frequency:
Nominal output frequency of a crystal oscillator |
| Frequency stability:
Deviation from the nominal output frequency including the frequency deviations
due to manufacturing process, temperature, power source variation and load
variation |
| Operating temperature
range: Temperature range satisfying the output frequency stability and
output signal characteristics specifications. |
| Absolute maximum
rating: Maximum rated value assuring the normal operation of a crystal
oscillator. Exceeding this value may result in the decrease in the reliability
of a crystal oscillator or cause it to be broken. It is never allowed to
exceed this value even if just once. |
| Stand-by function:
External digital signals perform the function of making a control so as
to allow the oscillation signals to be outputted or prevent the oscillation
output. |
| Dual Output function:
Allows the simultaneous output of the initial oscillation frequency and
the initial oscillation frequency times (1/2)n (n: 1 to 8, positive
interger)(Only the model 1129 and the model 1329 are capable of performing
this function.) |
| Power consumption:
Current flowing from the power source terminals during the oscillation of
a crystal unit (Source voltage: 5V) |
| Rise time: Time
interval from "L" level to "H" level of the output waveform. Refer to the
output waveform for each type. |
| Fall time: Time
interval from "H" level to "L" level of the output waveform. Refer to the
output waveform of each type. |
Fanout: Number
of IC gates which can be connected to the output terminal of a crystal oscillator
|
| APPLICATION
NOTE |
|
| The crystal products require different
handling from other electric components. Special attention should be paid
to the following: |
1. Crack caused by bending the
lead
The lead terminals are hermetically sealed by glass. If bent at
the root of the terminals, a crack may occur and decrease quality due
to insufficient air tightness. |
2. Resistance to dropping
These models are designed to be impactproof so that no damage occurs when
dropped a height three times. However, if dropped from a desk etc., it
is advisable to check their performance or contact us to check it. |
3. Electrostatic protection
These models employ C-MOS Ics for the active element. Please use them
in static-free environments. |
4. High temperature
Normal operation cannot be guaranteed for these models at +125 C
(for 24 hours). Be sure that the units are kept within the specified temperature
range. |
5. Storage period for solderability
The lead terminals are solder plated if stored for a long time, the solder
may oxidize and reduce performance. It is advisable to avoid storing it
form more than 6 months without assembling. |
6. EMI
The unit is contained in a hermetic metal package and is provided with
a case earth to prevent electromagnetic interference. Careful attention
should be paid to electromagnetic interference if it is used for a set.
Among surface mounting type, we recommend 1600L series, 2500L series which
are EMI Consider design. Please contact us concerning measures to be taken
against electromagneic interference for a set. |
7. Ultrasonic cleaning
Basically, ultrasonic cleaning of a crystal oscillator is possible. But
a crystal wafer may be broken depending upon mounting or cleaning conditions.
Contact us prior to use. |
8. Others
In case of special cases, contact us. |
| TECHNICAL
TERMS |
|
| The following technical
terms are generally used for crystal clock oscillators. |
| Nominal frequency:
Nominal output frequency of a crystal oscillator |
| Frequency stability:
Deviation from the nominal output frequency including the frequency deviations
due to manufacturing process, temperature, power source variation and load
variation |
| Operating temperature
range: Temperature range satisfying the output frequency stability and
output signal characteristics specifications. |
| Absolute maximum
rating: Maximum rated value assuring the normal operation of a crystal
oscillator. Exceeding this value may result in the decrease in the reliability
of a crystal oscillator or cause it to be broken. It is never allowed to
exceed this value even if just once. |
| Stand-by function:
External digital signals perform the function of making a control so as
to allow the oscillation signals to be outputted or prevent the oscillation
output. |
| Dual Output function:
Allows the simultaneous output of the initial oscillation frequency and
the initial oscillation frequency times (1/2)n (n: 1 to 8, positive
interger)(Only the model 1129 and the model 1329 are capable of performing
this function.) |
| Power consumption:
Current flowing from the power source terminals during the oscillation of
a crystal unit (Source voltage: 5V) |
| Rise time: Time
interval from "L" level to "H" level of the output waveform. Refer to the
output waveform for each type. |
| Fall time: Time
interval from "H" level to "L" level of the output waveform. Refer to the
output waveform of each type. |
Fanout: Number
of IC gates which can be connected to the output terminal of a crystal oscillator
|
| APPLICATION
NOTE |
|
| The crystal products require different
handling from other electric components. Special attention should be paid
to the following: |
1. Crack caused by bending the
lead
The lead terminals are hermetically sealed by glass. If bent at
the root of the terminals, a crack may occur and decrease quality due
to insufficient air tightness. |
2. Resistance to dropping
These models are designed to be impactproof so that no damage occurs when
dropped a height three times. However, if dropped from a desk etc., it
is advisable to check their performance or contact us to check it. |
3. Electrostatic protection
These models employ C-MOS Ics for the active element. Please use them
in static-free environments. |
4. High temperature
Normal operation cannot be guaranteed for these models at +125C
(for 24 hours). Be sure that the units are kept within the specified temperature
range. |
5. Storage period for solderability
The lead terminals are solder plated if stored for a long time, the solder
may oxidize and reduce performance. It is advisable to avoid storing it
form more than 6 months without assembling. |
6. EMI
The unit is contained in a hermetic metal package and is provided with
a case earth to prevent electromagnetic interference. Careful attention
should be paid to electromagnetic interference if it is used for a set.
Among surface mounting type, we recommend 1600L series, 2500L series which
are EMI Consider design. Please contact us concerning measures to be taken
against electromagneic interference for a set. |
7. Ultrasonic cleaning
Basically, ultrasonic cleaning of a crystal oscillator is possible. But
a crystal wafer may be broken depending upon mounting or cleaning conditions.
Contact us prior to use. |
8. Others
In case of special cases, contact us. |
|
|
Features:
|
|
|
Specification:
|
|
|
Safety
Approval:
|
|
|
Other
Description:
|
|
|
|
|
|
|
|
|
