B-16 01/99
2N4856A, 2N4857A, 2N4858A, 2N4859A, 2N4860A, 2N4861A
N-Channel Silicon Junction Field-Effect Transistor
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Absolute maximum ratings at TA= 25¡C
2N4856A, 2N4857A, 2N4858A 2N4859A, 2N4860A, 2N4861A
Reverse Gate Source Voltage – 40 V – 30 V
Reverse Gate Drain Voltage – 40 V – 30 V
Continuous Device Dissipation 1.8 W 1.8 W
Continuous Forward Gate Current 50 mA 50 mA
Power Derating 10 mA/°C 10 mA/°C
TOÐ18 Package
See Section G for Outline Dimensions
Pin Configuration
1 Source, 2 Drain, 3 Gate & Case
Surface Mount
SMP4856A, SMP4857A, SMP4858A,
SMP4859A, SMP4860A, SMP4861A
2N4856A 2N4857A 2N4858A
At 25°C free air temperature: 2N4859A 2N4860A 2N4861A Process NJ132
Static Electrical Characteristics Min Max Min Max Min Max Unit Test Conditions
Gate Source Breakdown Voltage V(BR)GSS – 40 – 40 – 40 V IG= – 1µA, VDS = ØV
2N4856A, 2N4857A, 2N4858A
Gate Source Breakdown Voltage V(BR)GSS – 30 – 30 – 30 V IG= – 1µA, VDS = ØV
2N4859A, 2N4860A, 2N4861A
Gate Reverse Current IGSS – 250 – 250 – 250 pA VGS = – 20V, VDS = ØV
2N4856A, 2N4857A, 2N4858A – 500 – 500 – 500 nA VGS = – 20V, VDS = ØV TA= 150°C
Gate Reverse Current IGSS – 250 – 250 – 250 pA VGS = – 15 V, VDS = ØV
2N4859A, 2N4860A, 2N4861A – 500 – 500 – 500 nA VGS = – 15V, VDS = ØV TA= 150°C
Gate Source Cutoff Voltage VGS(OFF) – 4 – 10 – 2 – 6 – 0.8 – 4 V VDS = 15V, ID= 0.5 nA
Drain Saturation Current (Pulsed) IDSS 50 20 100 8 80 mA VDS = 15V, VGS = ØV
Drain Cutoff Current ID(OFF) 250 250 250 pA VDS = 15V, VGS = – 10V
500 500 500 nA VDS = 15V, VGS = – 10V TA= 150°C
Drain Source ON Voltage VDS(ON) 0.75 0.5 0.5 V VGS = ØV, ID= ( )
(20) (10) (5) (mA)
Dynamic Electrical Characteristics
Common Source ON Resistance rds(on) 25 40 60 ΩVGS = ØV, ID= ØA f = 1 kHz
Common Source Input Capacitance Ciss 10 10 10 pF VDS = ØV, VGS = – 10V f = 1 MHz
Common Source Reverse Crss 4 3.5 3.5 pF VDS = ØV, VGS = – 10V f = 1 MHz
Transfer Capacitance
Switching Characteristics 568ns
Turn ON Delay Time td(on) (20) (10) (5) (mA)
[–10] [– 6] [– 4] [V] VDD = 10V, VGS = ØV
348ns
ID(ON) = ( )
Rise Time tr(20) (10) (5) (mA) VGS(OFF) = [ ]
[–10] [– 6] [– 4] [V] (2N4856A, 2N4859A) RL= 464Ω
25 40 80 ns (2N4857A, 2N4860A) RL= 953Ω
Turn OFF Delay Time td(off) (20) (10) (5) (mA) (2N4858A, 2N486A1) RL= 1910Ω
[–10] [– 6] [– 4] [V]
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Databook.fxp 1/14/99 12:00 PM Page B-16
