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Information furnished by Linear Integrated Systems and Micross Components is believed to be accurate and reliable. However, no responsibility is assumed

for its use; nor for any infringement of patents or 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 J177 

LOW ON RESISTANCE 

LOW GATE OPERATING CURRENT 

FAST SWITCHING 

ABSOLUTE MAXIMUM RATINGS  

@ 25°C (unless otherwise noted) 

Maximum Temperatures 

Storage Temperature ‐55°C to +150°C 

Operating Junction Temperature ‐55°C to +135°C 

Maximum Power Dissipation 

Continuous Power Dissipation  

350mW 

MAXIMUM CURRENT

Gate Current (Note 1) 

MAXIMUM VOLTAGES 

Gate to Drain Voltage 

Gate to Source Voltage 

  

  

 

LSJ177 ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted)

SYMBOL 

CHARACTERISTIC 

MIN 

TYP. 

MAX 

UNITS 

CONDITIONS 

Gate to Source Breakdown Voltage 

30 

‐‐ 

‐‐ 

 

V 

 

IG = ‐1µA,   VDS = 0V 

Gate to Source Forward Voltage 

‐‐ 

‐0.7 

‐‐ 

                   IG = ‐1mA,   VDS = 0V 

Gate to Source Cutoff Voltage 

0.8 

‐‐ 

2.25 

VDS = ‐15V, ID = ‐10nA 

Drain to Source Saturation Current ‐1.5 

‐‐ 

‐20 

VDS = ‐15V, VGS = 0V 

Gate Reverse Current 

‐‐ 

0.01 

1  

nA 

 

VGS = 20V,  VDS = 0V 

Gate Operating Current 

‐‐ 

0.01 

‐‐ 

VDG = ‐15V,  ID = ‐1mA 

Drain Cutoff Current 

‐‐ 

‐0.01 ‐1 

VDS = ‐15V, VGS = 0V 

Drain to Source On Resistance 

‐‐ 

‐‐ 

300 Ω 

  

 

 

 

 

 

LSJ177 SWITCHING CHARACTERISTICS @ 25°C (unless otherwise noted) 

SYMBOL 

CHARACTERISTIC  

UNITS 

CONDITIONS 

Turn On Time 

10  

 

ns 

 

See Switching Circuit 

Turn On Rise Time 

15 

Turn Off Time 

10 

Turn Off Fall Time 

20 

 

LSJ177 SWITCHING CIRCUIT PARAMETERS                                                                                                                                   SWITCHING CIRCUIT 

5V  

5600Ω 

 

390Ω 

 

  

 

  

 

  

 

  

 

  

 

The LSJ177 is a single P-Channel JFET switch

LSJ177

P-CHANNEL JFET

Linear Systems replaces discontinued Siliconix J177

This p-channel analog switch is designed to provide low

on-resistance and fast switching. When used in

combination with the complimentary J/SST111 n-

channel family, the LSJ177 simplifies series-shunt

switching applications

.

LSJ177 Applications:

Analog Switches

Choppers

Sample-and-Hold

Normally “On” Switches

Current Limiters

LSJ177 Benefits:

Low Error Voltage

High-Speed Analog Circuit Performance

Negligible “Off-Error,” Excellent Accuracy

Good Frequency Response

Eliminates Additional Buffering

Micross Components Europe

Tel: +44 1603 788967

SOT-23 (Top View)

Available Packages:

LSJ177 in SOT-23

LSJ177 in bare die.

Please contact Micross for full

package and die dimensions

Note 1 ‐  Absolute maximum ratings are limiting values above which LSJ177 serviceability may be impaired.