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Micross Components Ltd, United Kingdom, Tel: +44 1603 788967, Fax: +44 1603788920, Email: chipcomponents@micross.com Web: www.micross.com/distribution.aspx
FEATURES
DIRECTREPLACEMENTFORSILICONIXSST4119
LOWPOWERIDSS<90µA
MINIMUMCIRCUITLOADINGIGSS<10pA
ABSOLUTEMAXIMUMRATINGS
@25°C(unlessotherwisenoted)
MaximumTemperatures
StorageTemperature‐65°Cto+175°C
OperatingJunctionTemperature‐55°Cto+150°C
MaximumPowerDissipation
ContinuousPowerDissipation 300mW
MAXIMUMCURRENT
GateCurrent(Note1)50mA
MAXIMUMVOLTAGES
GatetoDrainorGatetoSource(Note2)‐40V

SST4119ELECTRICALCHARACTERISTICS@25°C(unlessotherwisenoted)
SYMBOLCHARACTERISTICMINTYP.MAXUNITSCONDITIONS
BVGSSGatetoSourceBreakdownVoltage‐40 ‐‐ ‐‐ VIG=‐1µA,VDS=0V
VGS
(
off
)
GatetoSourceCutoffVoltage‐2 ‐‐ ‐6V VDS=10V,ID=1nA
IDSSGatetoSourceSaturationCurrent0.20 ‐‐ 0.60mAVDS=10V,VGS=0V
IGSSGateLeakageCurrent ‐‐ ‐‐ ‐10pAVGS=‐20V,VDS=0V
‐‐ ‐‐ ‐25VGS=‐20V,VDS=0V,150°C
gfsForwardTransconductance(Note3)100 ‐‐ 330µmhoVDS=10V,VGS=0V,f=1kHz
gosOutputConductance ‐‐ ‐‐ 10
CissInputCapacitance ‐‐ ‐‐ 3pFVDS=10V,VGS=0V,f=1MHz
CrssReverseTransferCapacitance ‐‐ ‐‐ 1.5


NOTES
1.AbsolutemaximumratingsarelimitingvaluesabovewhichSST4119serviceabilitymaybeimpaired.
2.Duetosymmetricalgeometry,theseunitsmaybeoperatedwithsourceanddrainleadsinterchanged
3.Thisparameterismeasuredduringa2msinterval100msafterpowerisapplied.(NotaJEDECcondition.)
The SST4119 is an Ultra-High Input Impedance N-Channel JFET
SST4119
N-CHANNEL JFET
Linear S
y
stems re
p
laces discontinued Siliconix SST4119
Micross Components Europe
Tel: +44 1603 788967
Email: chipcomponents@micross.com
Web: http://www.micross.com/distribution
Available Packages:
SST4119 in SOT-23
SST4119 in bare die.
Please contact Micross for full
package and die dimensions
SST4119 Benefits:
Insignificant Signal Loss/Error Voltage
with High-Impedance Source
Low Power Consumption (Battery)
Maximum Signal Output, Low Noise
Hi
g
h Sensitivit
y
to Low-Level Si
g
nals
The SST4119 provides ultra-high input impedance. The
device is specified with a 10-pA limit and is ideal for use
as a high-impedance sensitive front-end amplifier.
SST4119 Applications:
High-Impedance Transducer
Smoke Detector Input
Infrared Detector Amplifier
Precision Test Equipment
SOT-23 (Top View)