UMZ6.8EN Diodes Zener diode UMZ6.8EN !External dimensions (Units : mm) !Applications Constant voltage control For the ESD measure of a signal line 2.0±0.2 0.9±0.1 1.3±0.1 0.7 0.65 0.65 !Features 1) Small surface mounting type. (UMD5) 2) Composite type with four athode common elements 3) High reliability 2.1±0.1 1.25±0.1 0.1Min. 0~0.1 D6F 0.2 +0.5 −0.05 0.15±0.05 Each lead has same dimensions !Construction Silicon epitaxial planar ROHM : UMD5 EIAJ : SC-88A JEDEC : SOT-353 !Absolute maximum ratings (Ta=25°C) Parameter !Equivalent circuit Symbol Limits Unit Power dissipation P 200 mW Junction temperature Tj 150 °C Storage temperature Tstg −55~+150 °C ∗ ∗ Total of 4 elements !Electrical characteristics (Ta=25°C) Parameter Symbol Min. Typ. Max. Unit VZ 6.47 − 7.14 V Reverse current IR − − 0.5 µA VR=3.5V Operating resistance ZZ − − 40 Ω IZ=5mA Capacitance between terminals CT − 9 − pF f=1MHz, VR=5V Zener voltage !Others Parameter IEC61000-4-2 Charge / discharge capacitance : 150pF Device configuration Discharge resistance : 330Ω 10 repetitions Judgment contents No malfunction Contact : ±8kV Suspended : ±15kV Conditions IZ=5mA UMZ6.8EN Diodes !Electrical characteristic curves (Ta=25°C) 300 10m 1m 100µ 10µ 1µ 100n 5 6 7 ZENER VOLTAGE : Vz (V) Fig.1 Zener voltage characteristic 8 POWER DISSIPATION : Pd (mW) DYNAMIC IMPEADANCE : Zz (Ω) ZENER CURRENT : Iz (A) −25°C 25°C 75°C 125°C 100 10 1 0.01 0.1 1 10 ZENER CURRENT : Iz (mA) Fig.2 Operating resistance Zener current characteristic 200 100 0 0 25 50 100 AMBIENT TEMPERATURE : Ta (°C) Fig.3 Derating curve 150