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other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Linear Integrated Systems.

FEATURES 

DIRECT REPLACEMENT FOR SILICONIX SST4391 

LOW ON RESISTANCE 

LOW GATE OPERATING CURRENT 

FAST SWITCHING 

ABSOLUTE MAXIMUM RATINGS

Maximum Temperatures 

Storage Temperature ‐65°C to +200°C 

Operating Junction Temperature ‐55°C to +200°C 

Maximum Power Dissipation 

Continuous Power Dissipation  

350mW 

MAXIMUM CURRENT

Gate Current (Note 1) 

MAXIMUM VOLTAGES 

Gate to Drain Voltage /  Gate to Source Voltage ‐35V 

SST4391 ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted)

SYMBOL 

CHARACTERISTIC 

MIN 

TYP. 

MAX 

UNITS 

CONDITIONS 

Gate to Source Breakdown Voltage ‐35 

‐‐ 

‐‐ 

 

V 

Gate to Source Cutoff Voltage ‐4 

‐‐ 

‐10 

Gate to Source Forward Voltage 

‐‐ 

0.7 

1 

Drain to Source On Voltage 

‐‐ 

0.25 

‐‐ 

Drain to Source On Voltage 

‐‐ 

0.3 

‐‐ 

 

Drain to Source On Voltage 

‐‐ 

0.35 

0.4  

Drain to Source Saturation Current

50 

‐‐ 

‐‐ 

mA 

Gate Reverse Current 

‐‐ 

‐5 ‐100  

pA 

Gate Operating Current 

‐‐ 

‐5 

‐‐ 

VDG = 15V,  ID = 10mA 

Drain Cutoff Current 

‐‐ 

5 

100 

VDS = 10V,   VGS = ‐10V 

Drain to Source On Resistance 

‐‐ 

‐‐ 

30 Ω 

VGS = 0V,   ID = 1mA 

SST4391 DYNAMIC ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted) 

SYMBOL 

CHARACTERISTIC 

TYP 

MIN 

MAX 

UNITS 

CONDITIONS 

Forward Transconductance 

6 

‐‐ 

‐‐ 

mS 

VDS = 20V,  ID = 1mA,  f = 1kHz 

Output Conductance 

25 

‐‐ 

‐‐ 

µS 

VDS = 20V,  ID = 1mA,  f = 1kHz 

Drain to Source On Resistance 

‐‐ 

‐‐ 

30 Ω 

Input Capacitance 

13 

‐‐ 

‐‐ 

 

 

pF 

Reverse Transfer Capacitance 

3.6 

‐‐ 

‐‐ 

3.5 

‐‐ 

‐‐ 

3.1 

‐‐ 

‐‐ 

Equivalent Input Noise Voltage 

3 

‐‐ 

‐‐ 

nV/√Hz 

SST4391 SWITCHING ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted) 

SYMBOL 

CHARACTERISTIC 

TYP 

MIN 

MAX 

UNITS 

CONDITIONS 

Turn On Time 

2 

‐‐ 

‐‐ 

 

 

ns 

 

 

 

2 

‐‐ 

‐‐ 

Turn Off Time 

6 

‐‐ 

‐‐ 

13 

‐‐ 

‐‐ 

Notes: 1. Absolute ratings are limiting values above which serviceability may be impaired 

             2. Pulse test: PW ≤ 300µs, Duty Cycle ≤ 3% 

 

SST4391 SWITCHING CIRCUIT PARAMETERS                                                                                                                                         SWITCHING CIRCUIT 

800Ω 

 

12mA  

  

 

  

 

  

 

  

 

  

 

SST4391

Single N-Channel JFET switch

Linear Systems replaces discontinued Siliconix SST4391

The SST4391 features many of the superior

characteristics of JFETs which make it a good choice

for demanding analog switching applications and for

specialized amplifier circuits.

SST4391 Applications:

Analog Switches

Choppers,

Sample-and-Hold

Normally “On” Switches, Current Limiters

SST4391 Benefits:

Low Error Voltage

High-Speed Analog Circuit Performance

Negligible “Off-Error,” Excellent Accuracy

Good Frequency Response, Low Glitches

Eliminates Additional Buffering

Micross Components Europe

Tel: +44 1603 788967

Available Packages:

SST4391 in SOT-23

SST4391 in bare die.

Contact Micross for full package and die dimensions

SOT-23 (Top View)