t variable capacitance diode BB639/bb659... for tuning of extended frequency band in vhf tv / vtr tuners high capactance ratio low series inductance low series resistance excellent uniformity and matching due to "in-line" matching assembly procedure BB639 bb659 type package configuration l s (nh) marking BB639 bb659 sod323 scd80 single single 1.8 0.6 yellow s de maximum ratings at t a = 25c, unless otherwise specified parameter symbol value unit diode reverse voltage v r 30 v peak reverse voltage ( r 5k ) v rm 35 forward current i f 20 ma operating temperature range t op -55 ... 150 c storage temperature t stg -55 ... 150 1 of 2 4008-318-123 sales@twtysemi.com http://www.twtysemi.com product specification y
electrical characteristics at t a = 25c, unless otherwise specified parameter symbol values unit min. typ. max. dc characteristics reverse current v r = 30 v v r = 30 v, t a = 85 c i r - - - - 10 200 na ac characteristics diode capacitance v r = 1 v, f = 1 mhz v r = 2 v, f = 1 mhz v r = 25 v, f = 1 mhz v r = 28 v, f = 1 mhz c t 36 27.7 2.5 2.4 38.3 29.75 2.85 2.6 40 31.8 3.2 2.9 pf capacitance ratio v r = 1 v, v r = 28 v, f = 1 mhz c t1 / c t28 13.5 14.7 - capacitance ratio v r = 2 v, v r = 25 v, f = 1 mhz c t2 / c t25 9.8 10.4 - capacitance matching 1) v r = 1 v, v r = 28 v, f = 1 mhz, 7 diode sequenc e BB639 v r = 1 v, v r = 28 v, f = 1 mhz, 4 diode sequenc e bb659 v r = 1 v, v r = 28 v, f = 1 mhz, 7 diode sequenc e bb659 c t / c t - - - - 0.3 0.4 2.5 1 2 % series resistance v r = 5 v, f = 470 mhz r s - 0.65 0.7 1 for details please refer to application note 047. 2 of 2 4008-318-123 sales@twtysemi.com http://www.twtysemi.com BB639/bb659... product specification
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