BB909A; BB909B are VHF variable capacitance diodes from Philips Semiconductors. They have excellent linearity, matched to 2.5%, hermetically sealed leaded glass SOD68 (DO-34) package, C28: 2.9 pF; ratio: 13.5, low series resistance. They are applicable for electronic tuning in VHF television tuners, band B up to 460 MHz and VCO.
The BB909A and BB909B are VHF variable capacitance diodes offered by Philips Semiconductors. They provide excellent linearity, are matched to 2.5 % tolerance, and are hermetically sealed in a SOD68 (DO‑34) leaded‑glass package. Typical capacitance values range from 2.6 pF to 33.5 pF depending on reverse voltage and frequency, with a capacitance ratio of about 13.5.
These diodes are intended for electronic tuning in VHF television tuners (band B up to 460 MHz) and voltage‑controlled oscillators. They are not approved for life‑support applications, and exceeding the listed limiting values may cause permanent damage.
| Maximum reverse voltage | 30 V |
|---|---|
| Maximum forward current | 20 mA |
| Operating junction temperature range | -55 °C to +100 °C |
| Capacitance at Va=1 V, f=1 MHz (BB909A) | 31 pF |
| Capacitance ratio | 13.5 |
They are supplied in a hermetically sealed leaded‑glass SOD68 (DO‑34) package.
They are used for electronic tuning in VHF television tuners (band B up to 460 MHz) and voltage‑controlled oscillators.
No, they are not designed for use in life‑support appliances or systems.