NTE6402
Programmable Unijunction Transistor (PUT)
Description:
The NTE6402 is a 3–terminal 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–point emitter
current, and valley–point current to meet his particular needs.
PUT’s are specifically charactrized for long interval timers and other applications requiring low leak-
age and low peak point current. PUT’s 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°C unless otherwise specified)
Gate–Cathode Forward Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V
Gate–Cathode Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –5V
Gate–Anode Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V
Anode–Cathode Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±40V
DC Anode Current (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mA
Peak Anode, Recurrent Forward Current
Pulse Width = 100µs, Duty Cycle = 1% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Pulse Width = 20µs, Duty Cycle = 1% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A
Peak Anode, Non–Recurrent Forward Current (10µs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±20mA
Capacitive Discharge Energy (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250µJ
Total Average Power (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mW
Operating Ambient Temperature Range (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50° to +100°C
Note 1. Derate currents and powers 1%/°C above 25°C.
Note 2. E = 1/2 CV
2
capacitor discharge energy with no current limiting.
NTE [ NTE ELECTRONICS ]
