NTE6400 & NTE6400A
Unijunction Transistor
Description:
The NTE6400 & NTE6400A Silicon Unijunction Transistors are three terminal devices having a stable
“N” type negative resistance characteristic over a wide temperature range. A stable peak point volt-
age, a low peak point current, and a high pulse pulse current make these devices useful in oscillators,
timing circuits, trigger circuits, and pulse generators where they can serve the purpose of two conven-
tional silicon or germanium transistors.
These devices are intended for applications where circuit economy is of primary importance.
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
RMS Power Dissipation, PD
Unstabilized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450mW
Stabilized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600mW
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.9mW/°C
RMS Emitter Current, IE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Peak Emitter Current (TJ = +150°C), IE(peak) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A
Emitter Reverse Voltage (TJ = +150°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V
Interbase Voltage, VBB
NTE6400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
NTE6400A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55V
Operating Temperature Range, Topr
Unstabilized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +140°C
Stabilized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +175°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +175°C
Thermal Resistance, Junction–to–Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.16°C/mW
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ Max Unit
Intrinsic Standoff Ratio
NTE6400
η
VBB = 10V, Note 1
0.4
54
–
–
0.80
0.67
NTE6400A
Interbase Resistance
RBBO
VBB = 3V, IE = 0, Note 1
4
–
–
12
30
kΩ
mA
µA
Modulated Interbase Current
IB2(MOD) VBB = 10V, IE = 50mA
6.8
Emitter Reverse Current
NTE6400
IEO
VB2E = 30V, IB1 = 0
–
–
–
–
12
1
NTE6400A
Peak Point Emitter Current
Valley Point Current
IP
IV
VBB = 25V
–
8
3
–
–
–
25
–
µA
mA
V
VBB = 20V, RB2 = 100Ω
Base–One Peak Pulse Voltage
VOB1
–