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08/22/02

Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability

indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to

workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the

Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.

DN3145

Advanced DMOS Technology

These depletion-mode (normally-on) transistors utilize an ad-

vanced vertical DMOS structure and Supertex’s well-proven

silicon-gate manufacturing process. This combination produces

devices with the power handling capabilities of bipolar transis-

tors and with the high input impedance and positive temperature

coefficient inherent in MOS devices. Characteristic of all MOS

structures, these devices are free from thermal runaway and

thermally-induced secondary breakdown.

Supertex’s vertical DMOS FETs are ideally suited to a wide range

of switching and amplifying applications where high breakdown

voltage, high input impedance, low input capacitance, and fast

switching speeds are desired.

Initial Release

Features

❏ High input impedance

❏ Low input capacitance

❏ Fast switching speeds

❏ Low on resistance

❏ Free from secondary breakdown

❏ Low input and output leakage

Applications

❏ Normally-on switches

❏ Solid state relays

❏ Converters

❏ Constant current sources

❏ Power supply circuits

❏ Telecom

Package Options

N-Channel Depletion-Mode Vertical DMOS FETs

Note: See Package Outline section for dimensions.

BV

DGX

(max)

(min)

TO-243AA*

450V

60Ω

120mA

DN3145N8

Ordering Information

Order Number / Package

Product marking for TO-243AA:

Where ❋ = 2-week alpha date code

DN1M❋

Absolute Maximum Ratings

Drain-to-Source Voltage

BV

DSX

Drain-to-Gate Voltage

Gate-to-Source Voltage

± 20V

Operating and Storage Temperature

-55°C to +150°C

Soldering Temperature*

300°C

G

D

S

D

TO-243AA

(SOT-89)