NTE1249
Integrated Circuit
Balancd Modulator
Description:
The NTE1249 is a balancd modulator circuit in a 7–Lead SIP type package designed for use in SSB
CB equipment.
Features:
DLow Operating Voltage
DHigh Carrier Suppression
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC 14.4V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Current, ICC 15mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation, PD22mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, Topr –20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg –55° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Total Circuit Current Itot V6 = 12V 6.5 9.5 12.5 mA
Zener Voltage V5 – 4– 6.15 – V
Signal Input Terminal Voltage V1 – 4– 3.1 – V
Carrier Input Terminal Voltage V3 – 4– 3.4 – V
Output Terminal Voltage V7 – 4– 8.6 – V
BM AC Output Voltage VO (BM) V6 = 9V –6 –3 0 dBm
Carrier Suppression SC 40 50 – dB
VCC
Pin Connection Diagram
(Front View)
Carrier Input
DC Source Balance/Modulator Control
Modulator Carrier Output
GND
Modulator Level Control
7
6
5
4
3
2
1Balance Control/Audio Input
.728 (18.5) Max
.600 (15.24)
.118 (3.0)
.012 (0.32)
.118 (3.0) Min
.248
(6.3
Max
.100 (2.54)
.095 (2.42)
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