NTE1744 Datasheet, PDF (1/3 Pages) NTE Electronics – Integrated Circuit Dual dbxII Noise Reduction System

NTE1744
Integrated Circuit
Dual dbxII Noise Reduction System
Description:
The NTE1744 is an integrated circuit in a 22–Lead DIP type package designed for use in dbxII noise
reduction circuits for stereo applications. This device can be used for U.S. sound multiplex TV ap-
plications and low voltage operation (1.8V) allows the NTE1744 to be used in battery–operated Hi–Fi
equipment.
Features:
D Wide Dynamic Range: 110dB
D Low Operating Voltage: V_CCmin = 1.8V
D Minimum Number of External Components
D Adjustment: Only One
D Low Power Consumption
D Wide Operating Voltage Range: V_CC = 1.8V to 14V
Absolute Maximum Ratings: (T_A = +25°C unless otherwise specified)
Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V
Supply Current, I_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Power Dissipation (T_A = +75°C), P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mW
Operating Ambient Temperature range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Electrical Characteristics: (T_A = +25°C, V_CC = 3V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Input/Output Characteristics
ENCODE Mode
V_OE–1 V_IN = +20dB, f = 1kHz
+7.5 +10.0 +12.5 dB
V_OE–2 V_IN = 0dB, f = 1kHz
–2.0 0 +2.0 dB
DECODE Mode
V_OE–3
V_OD–1
V_OD–2
V_OD–3
V_IN = –40dB, f = 1kHz
V_IN = +10dB, f = 1kHz
V_IN = 0dB, f = 1kHz
V_IN = –20dB, f = 1kHz
–23 –20 –17 dB
+17 +20 +23 dB
–2.0 0 +2.0 dB
–44 –40 –36 dB
Note 1. 0dB = 20mV = –34dBV