|Place of Origin:||China|
|Certification:||SGS REACH ISO9001:2008|
|Model Number:||49SMD 4.000MHZ|
|Minimum Order Quantity:||1|
|Supply Ability:||1 week|
|Frequency Stability:||＜7PF||Test Impedance Meter:||KH1240/250B|
ultra low frequency oscillator,
2 pin oscillator
4MHZ HC-49S DIP Low Frequency Crystal Oscillator and Electronic Component
1 , The air conditioning
2 , Test instruments/ultrasound
3 , Electric appliances
PCB VS Crystal Matching Test for Free
A steady oscillation (pulse) signal given to the circuit (strictly a selection) of a certain frequency is passed through the pulse count.
Operating Temperature Range:
Crystal Frequency & Resistance will be tested under the following conditions,
Unless extra requirments:
standard temperature(25±2℃) after heat balance.
The quartz crystal unit shall be subjected to normal atmospheric conditions for 1hr before being tested.
The Units are measured for its frequency and resistance in accordance with Table1 & without mechanical damage,after allowing the crystal to fall freely.From 75 cm of height 3 times on the firmed wood.
A. Test surface: 30mm thick hard board;
B. Drop height: 75cm;
C. Drop times: 3 times;
D. Begins to drop posture: the leading end is upward;
E. Initial and final test items: frequency, resistance
Find Lead Test:≤1×10-8atm·cc/S by Helium mass-mass-spectrometer detector,and vacuum and reach 1×10-3Pa；
Resistance to Soldering Heat:
The Units are measured for its frequency and resistance in accordance with Table 1 after dipping into molten solder with the temperature of 320℃±10℃；For 3~4 secs and at a depth up to a point 2.0mm from the base root.
|Frequency Tolerance(at25℃)||±10PPm ,±2PPm at25℃+/-2℃|
|Frequency Stability vs. Temp(FL-T)||±10PPm,±20PPm ,±30PPm|
|Operating Temperature range||-20~+70℃ -40~+85℃|
|Storage Temperature range||-45~+80℃|
|Temperature Characteristics||±10PPm ±20PPm|
|Load Capacitance||8 to 20 Pf or Serles|
1. Our products are all original and new from manufacturer. It must be work if the model number is correct.
2. We have advanced testing equipments
3. Get the international standard management sysem ISO9001,RoHS
4. All products before sending client,we make 72 hours aging test
5. We have 180days warranty
6. During the guarantee period, if the items you purchased from our store are out of perfected quality, pls notify us within 3 days after delivery, we will return the new products when we got your message.
Samples and technical support can be provided free of charge.