NTE NTE832

NTE832 & NTE832SM
Integrated Circuit
Tone Decoder
Description:
The NTE832 and NTE832SM are general purpose tone decoders designed to provide a saturated
transistor switch to GND when an input signal is present within the passband. The circuit consists
of an I and Q detector driven by a voltage controlled oscillator which determines the center frequency
of the decoder. External components are used to independently set center frequency, bandwidth, and
output delay.
Features:
D Logic Compatible Output with 100mA Current Sinking Capability
D Bandwidth Adjustment from 0 to 14%
D Inherent Immunity to False Signals
D High Stable Center Frequency
D High Rejection of Out–Of–Band Signals and Noise
D Center Frequency Adjustable from 0.01Hz to 500kHz
D Frequecny Range Adjustable over 20:1 range by an External Resistor
D Available in Standard 8–Lead DIP (NTE832) and Surface Mount SOIC–8 (NTE832SM)
Applications:
D Touch Tone Decoder
D Precision Oscillator
D Frequency Monitoring and Control
D Wide Band FSK Demodulation
D Communications Paging Decoders
D Carrier Current Remote Controls
D Ultrasonic Controls (Remote TV, etc.)
Absolute Maximum Ratings:
Operating Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10V
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10V to VCC +0.5V
Output Voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mW
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Note 1. The maximum junction temperature of these devices is +100°C. For operating at elevated
temperatures, devices must be derated on a thermal resistance of +187°C/W, junction–to–ambient.
Electrical Characteristics: (VCC = 5V, TA = +25°C, unless otherwise specified)
Parameter
Test Conditions
Min
Typ
Max
Unit
4.75
5.00
9.00
V
–
7
10
mA
Power Supply Current, Activated
–
12
15
mA
Quiescent Power Dissipation
–
35
–
mW
Input Resistance
15
20
25
kΩ
Power Supply Voltage
Power Supply Current, Quiescent
RL = 20kΩ
Smallest Detectable Input Voltage
IL = 100mA, fi = fo
–
20
25
mVrms
Largest No Output Input Voltage
IC = 100mA, fi = fo
10
15
–
mVrms
Largest Simultaneous Outband Signal to Inband
Signal Ratio
RL = 20kΩ
–
+6
–
dB
Minimum Input Signal to Widband Noise Ratio
Bn = 140kHz
–
–6
–
dB
Largest Detection Bandwidth
10
14
18
% of fo
Largest Detection Bandwidth Skew
–
2
3
% of fo
Largest Detection Bandwidth with Variation with
Temperature
–
±0.1
±0.5
%/°C
–
±1
±5
%/V
100
500
–
kHz
Largest Detection bandwidth with Variation with
Supply Voltage
4.75V to 6.75V
Highest Center Frequency
RL = 20kΩ
Center Frequency Stability
0° < TA , +70°C
–
35±60
–
ppm/°C
–55° < TA < +125°C
–
35±140
–
ppm/°C
4.75V to 6.75V
–
0.4
2.0
%/V
–
fo/20
–
Center Frequency Shift with Supply Voltage
Fastest ON–OFF Cycling Rate
Output Leakage Current
V8 = 15V
–
0.01
25.0
µA
Output Saturation Voltage
ei = 25mV, I8 = 30mA
–
0.2
0.4
V
ei = 25mV, I8 = 100mA
–
0.6
1.0
V
Output Fall Time
–
30
–
ns
Output Rise Time
–
150
–
ns
Pin Connection Diagram
Output Filter
1
8
Output
Loop Filter
2
7
GND
Input
3
6
Timing Capacitor
VCC
4
5
Timing Resistor
NTE832 (8–Lead DIP)
8
5
.260 (6.6)
1
4
.300
(7.62)
.390 (9.9)
Max
.155
(3.93)
.100 (2.54)
.145 (3.68)
.300 (7.62)
NTE832SM (SOIC–8)
.192 (4.9)
8
1
5
4
.050 (1.27)
.236
(5.99)
.154
(3.91)
016
(.406)
061
(1.53)
.006 (.152)
NOTE: Pin1 on Beveled Edge
.198 (5.03)