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CL VFDs Application Note APN130

6. RELIABILITY TEST CONDITIONS

Basically, the CL VFD is subjected to the same reliability test standards "TT-99-3050A" as the conventional VFDs. For details on the test conditions, refer to Vacuum Fluorescent Display Application Note APN101.

7. PRECAUTIONS ON THE HANDLING

  1. Since the CL VFD contains C-MOS chips, please be cautious of electrostatic discharge failure. Unpacking of the CL VFD from the packing tray, mounting or soldering to the PCBs should be conducted in an environment provided with anti-static measures.
  2. When the SO terminals are not used, please leave them open.
  3. Some types of CL VFDs may come equipped with terminals of same designation. Those terminals with the same designation should all be connected in parallel.
  4. Please refer to the power supply sequence in this application note or individual specification.
  5. Insert a noise filtering capacitor between "VDD1 "-"GND".

8. WORD IN SPECIFICATION

Spec. No.
 The "Spec No."(=revision number) and the date issued of the specification sheet are sheet is shown in footer of each sheet. The specification of the standard models are subject to change without prior notice. So, please check if the revision number of your specification is the latest version before evaluating it.

Absolute Maximum Ratings
 An "Absolute Maximum Ratings" refers to a value that must not be exceeded in any event. The VFD must not be used in excess of the value specified under this item. Use of a VFD in excess of the specified rating may lead to its permanent breakdown. Therefore, high reliability will be secured if special attention is paid to the design of a power supply circuit, possible fluctuations in the supply voltage, surrounding components, operating temperature, environment, surges or spikes, etc.

Recommended Operating Conditions
"Recommended Operating Conditions" represents the specification of a recommended operating condition that guarantees the operation of a VFD. It also serves as a test condition for which the product is subjected prior to shipment from the factory. Therefore, it should be noted that if a VFD is used in excess of the maximum or minimum rating specified here, its operation and quality will not generally be guaranteed even when such raft remains within the absolute maximum rating.
In addition, this rated value has been defined assuming the most standard service conditions by the users. However, some may want to study the possibility of using the VFDs outside the rated value, prompted by a desired individual requirement. In such a case, please feel free to call to consult with us, as we are willing to discuss the possibility of the proposed specifications.

Test Circuit
 It is an example showing how to connect the power supplies. Basically, the test circuit in the factory inspection is the same as this one.

Electrical (and Optical) Characteristics
 All of numbers specified in this section shows the characteristics when the CL VFDs are tested under the typical (TYP) operating conditions unless otherwise noted.

Timing Chart
 It shows AC characteristics and relationship of interface operations.

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