KSK596PAWD

Overview

The KSK596PAWD is an N-channel Junction Field-Effect Transistor (JFET) manufactured by onsemi, originally documented under Fairchild Semiconductor. It operates with a maximum gate-drain voltage of -20 V and a drain current rating of 1 mA. The device features a forward transfer admittance ranging from 0.4 to 1.2 mS at 1 MHz. Input capacitance is typically 3.5 pF, while output capacitance is approximately 0.65 pF. The gate-source cut-off voltage spans from -0.6 V to -1.5 V. Drain current specifications are categorized into three bins: Class A (100–170 µA), Class B (150–240 µA), and Class C (210–350 µA).

Feature Summary

• Designed specifically for capacitor microphone applications in audio and telephone equipment.
• Provides excellent voltage characteristics suitable for sensitive signal processing.
• Delivers superior transient response capabilities.

Applications

• Audio capacitor microphones
• Telephone capacitor microphones

Procurement Notes

Verify the manufacturer origin carefully, as the component was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Confirm that the specific ordering suffix matches the required IDSS classification bin (A, B, or C) for your circuit design. Ensure the TO-92S package type aligns with your board layout constraints. Check for any discontinuation notices regarding legacy Fairchild inventory.

Selection Notes

Select this JFET based on the required drain current range and noise performance needs. Choose the appropriate IDSS classification bin to ensure consistent gain and biasing behavior across production batches. Verify that the low input capacitance meets the high-frequency requirements of the microphone preamplifier stage. Ensure the power dissipation limits are respected within the operating temperature range.

Part Context

This component belongs to the family of silicon N-channel JFETs designed for low-noise analog applications. It utilizes a TO-92S surface-mount package, offering a compact form factor for consumer electronics. The device represents a legacy product line from Fairchild Semiconductor, now managed under the onsemi portfolio, maintaining compatibility with established audio interface designs.

Replacement Considerations

Consult official cross-reference lists for equivalent N-channel JFETs with similar VGDO and IDSS parameters. Verify pinout compatibility for Source, Gate, and Drain connections. Ensure replacement devices support the TO-92S package if space is constrained.

FAQ

What are the available IDSS classification bins?

The KSK596 is available in three classifications: Class A (100–170 µA), Class B (150–240 µA), and Class C (210–350 µA).

What is the maximum gate-drain voltage rating?

The absolute maximum gate-drain voltage (VGDO) is rated at -20 V.

Is this device suitable for high-frequency operation?

Yes, it has a low input capacitance of 3.5 pF and output capacitance of 0.65 pF at 1 MHz, making it suitable for audio frequency applications.