BB179LX,315

BB179LX UHF variable capacitance diode Rev. 01 13 April 2006 Preliminary data sheet 1. Product prole 1.1 General description The BB179LX is a planar technology variable capacitance diode in a SOD882T ultra small leadless plastic SMD package. The excellent matching performance is achieved by gliding matching and a Direct Matching Assembly (DMA) procedure. 1.2 Features n Excellent linearity n Excellent matching to 2 % DMA n Ultra small leadless SMD package n C : 2.1 pF C to C ratio typical 9 d(28V) d(1V) d(28V) n Low series resistance 1.3 Applications n Voltage Controlled Oscillators (VCO) n Electronic tuning in VHF television tuners 2. Pinning information Table 1. Discrete pinning Pin Description Simplied outline Symbol 1 1 cathode 2 anode 1 2 sym008 Transparent top view 1 The marking bar indicates the cathode. 3. Ordering information Table 2. Ordering information Type number Package Name Description Version BB179LX - leadless ultra small plastic package 2 terminals SOD882T body 1.0 0.6 0.4 mmBB179LX Philips Semiconductors UHF variable capacitance diode 4. Marking Table 3. Marking Type number Marking code BB179LX L4 5. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit V reverse voltage - 30 V R I forward current - 20 mA F T storage temperature - 55 +150 C stg T junction temperature - 55 +125 C j 6. Characteristics Table 5. Characteristics T = 25 C unless otherwise specied. j Symbol Parameter Conditions Min Typ Max Unit I reverse current see Figure 3 R V =30V - - 10 nA R V =30V T =85 C - - 200 nA R j r diode series resistance f = 470 MHz C = 30 pF see Figure 2 - 0.65 - s d C diode capacitance see Figure 1 and Figure 4 f = 1 MHz d V = 1 V 18.2 - 21.3 pF R V = 28 V 1.95 2.1 2.22 pF R diode capacitance ratio f = 1 MHz - 1.27 - C d1()V ---------------- C d2()V diode capacitance ratio f = 1 MHz 8.45 9 10.9 C d1()V ------------------- C d2()8V diode capacitance ratio f = 1 MHz - 1.05 - C d2()5V ------------------- C d2()8V diode capacitance V = 1 V to 28 V in sequence of 5 --2 % C R d ---------- matching diodes (gliding) C d BB179LX 1 Koninklijke Philips Electronics N.V. 2006. All rights reserved. Preliminary data sheet Rev. 01 13 April 2006 2 of 7