NTE6402
Programmable Unijunction Transistor (PUT)
Description:
The NTE6402 is a 3鈥搕erminal silicon planer passivated PNP device available in the standard plastic
low cost TO98 and TO92 type packages. The terminals are designated as anode, anode gate, and
cathode.
This device has been characterized as a Programmable Unijunction Transistor (PUT), offering many
advantages over conventional unijunction transistors. The designer can select R
1
and R
2
to program
unijunction characteristics such as intrinsic standoff ratio, Interbase resistance, peak鈥損oint emitter
current, and valley鈥損oint current to meet his particular needs.
PUT鈥檚 are specifically charactrized for long interval timers and other applications requiring low leak-
age and low peak point current. PUT鈥檚 similar types have been characterized
Applications:
D
SCR Trigger
D
Pulse and Timing Circuits
D
Oscillators
D
Sensing Circuits
D
Sweep Circits
Absolute Maximum Ratings:
(T
A
= +25擄C unless otherwise specified)
Gate鈥揅athode Forward Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V
Gate鈥揅athode Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?V
Gate鈥揂node Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V
Anode鈥揅athode Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
鹵40V
DC Anode Current (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mA
Peak Anode, Recurrent Forward Current
Pulse Width = 100碌s, Duty Cycle = 1% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Pulse Width = 20碌s, Duty Cycle = 1% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A
Peak Anode, Non鈥揜ecurrent Forward Current (10碌s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
鹵20mA
Capacitive Discharge Energy (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250碌J
Total Average Power (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mW
Operating Ambient Temperature Range (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +100擄C
Note 1. Derate currents and powers 1%/擄C above 25擄C.
Note 2. E = 1/2 CV
2
capacitor discharge energy with no current limiting.
1
2
