ZC835BTC

Overview

The ZC835BTC is a silicon hyperabrupt varactor diode manufactured by Diodes Incorporated under the Zetex brand. It is designed for frequency control and filtering applications, featuring closely controlled capacitance-voltage (CV) characteristics and high quality factor (Q). The device operates with a peak reverse voltage of 25V and is available in miniature surface-mount packages such as SOT-23-3. Key electrical parameters include a typical reverse current of 200pA to ensure low phase noise performance and a high tuning ratio suitable for voltage-controlled oscillators.

Feature Summary

• Hyperabrupt junction design for high tuning ratio
• Low reverse leakage current for reduced phase noise
• High Q factor for stable frequency control
• Miniature surface-mount package options

Applications

• Voltage-Controlled Crystal Oscillators (VCXO)
• Temperature-Compensated Crystal Oscillators (TCXO)
• Wireless communications systems
• Mobile radio equipment

Procurement Notes

Verify the specific ordering suffix and package variant against the official Diodes Incorporated datasheet before procurement. Confirm that the component meets RoHS compliance requirements for your target market. Ensure the selected package matches your PCB footprint specifications. Check for any recent product change notices or lifecycle status updates directly from the manufacturer.

Selection Notes

Select this component when low phase noise and precise capacitance tuning are critical for oscillator stability. Consider the operating voltage range and required Q factor at the specific operating frequency. Evaluate the thermal management needs if the device will operate near its maximum temperature limits. Compare the tuning ratio against alternative varactors to ensure sufficient frequency deviation capability.

Part Context

The ZC835BTC belongs to the 835B series of silicon hyperabrupt varactor diodes produced by Diodes Incorporated's Zetex division. This series is engineered for high-performance RF applications requiring tight capacitance tolerances. The part is part of a broader family of miniature surface-mount varactors designed for integration into compact wireless and communication devices.

Replacement Considerations

Consult the official Diodes Incorporated documentation for confirmed substitute part numbers within the 835B series or equivalent hyperabrupt varactors. Verify pinout compatibility and electrical parameter equivalence before substitution.