PN4091 / 4092 / 4093 / MMBF4091 / 4092 / 4093 N-Channel Switch is a low-level analog switch produced by Fairchild Semiconductor Corporation for low-level analog switching, sample-and-hold circuits, and chopper-stabilized amplifiers.
This document provides technical specifications for the Fairchild Semiconductor PN4091, PN4092, and PN4093 series of N-channel switches. These devices are available in a SoT-23 package with interchangeable source and drain terminals.
The datasheet details absolute maximum ratings, thermal characteristics, and comprehensive electrical parameters including off-state breakdown voltages, on-resistance values, input capacitance, and switching times for each model variant.
| Package Type | SoT-23 |
|---|---|
| Operating Junction Temperature Range | -55 to +150 °C |
| Total Device Dissipation (PN4091/4093) | 625 mW |
| Thermal Resistance Junction to Case (PN4091/4093) | 125 °C/W |
| Gate-Source Breakdown Voltage (PN4091) | -40 V |
| Drain-Source On Resistance (PN4091) | 30 Ω |
| Input Capacitance (PN4091) | 16 pF |
| Turn-On Time (PN4091) | 25 ns |
These devices are designed for low level analog switching, sample and hold circuits and chopper stabalized amplifiers.
Yes, the source and drain are interchangeable for these devices.