NTE NTE994M

NTE994M
Integrated Circuit
Voltage Controlled Oscillator
Description:
The NTE994M is a general purpose voltage controlled oscillator in an 8–Lead DIP type package
which may be used to generate square and triangular waves, the frequency of which is a very linear
function of a control voltage. The frequency is also a function of an external resistor and capacitor.
The NTE994M is specified for operation over the 0°C to +70°C temperature range.
Features:
D Wide Supply Voltage Range: 10 to 24Volts
D Very linear modulation characteristics
D High temperature stability
D Excellent supply voltage rejection
D 10 to 1 frequency range with fixed capacitor
D Frequency programmable by means of current, voltage, resistor or capacitor
Applications:
D FM Modulation
D Signal Generation
D Function generation
D Frequency shift keying
D Tone generation
Absolute Maximum Ratings:
Power Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V
Power Dissipation (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mW
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Lead Temperature Setting (Soldering, 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Note 1. The maximum junction temperature of the NTE994M is 100°C. For operating at elevated
junction temperatures, devices must be derated based on a thermal resistance of 100°C/W.
Electrical Characteristics: (VCC = 12V, TA = +25°C unless otherwise specified)
Parameter
Conditions
Maximum Operating Frequency
Typ
Max
Units
–
1
–
MHZ
–
VCC
–
–
200
–
ppm/°C
–
0.1
2
%/V
0.5
1
–
MΩ
6.0
6.6
7.2
kHZ/V
–
0.2
1.5
%
500
1
–
MHZ
–
10:1
–
–
–
–
50
50
–
–
Ω
RO = 2k, CO = 2.7pf
3/
Input Voltage Range Pin 5
Average Temperature Coefficient
of Operating Frequency
Supply Voltage Rejection
10V to 20V
Input Impedance Pin 5
VCO Sensitivity
For Pin 5, from 8V to 10V,
fO = 10kHZ
FM Distortion
±10 Deviation
Maximum Sweep Rate
Sweep Range
Output Impedance
Min
Pin 3
Pin 4
4VCC
Square Wave Output Level
RL1 = 10k
5.0
5.4
–
Vp–p
Triangle Wave Output Level
RL2 = 10k
2.0
2.4
–
Vp–p
Square Wave Duty Cycle
40
50
60
%
Square Wave Rise Time
–
20
–
ns
Square Wave Fall Time
–
50
–
ns
–
0.5
1
%
+1V Segment @ 1/2VCC
Triangle Wave Linearity
Pin Connection Diagram
GND
1
8
VCC
N.C.
2
7
Timing Capacitor
Square Wave Output
3
6
Timing Resistor
Triangle Wave Output
4
5
Modulator Input
8
5
.256 (6.52) Max
1
4
.393 (10.0)
Max
.300 (7.62)
.150
(3.81)
.100 (2.54)
.070 (1.77) Min
.300 (7.62)