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NTE748 Datasheet(PDF) 2 Page - NTE Electronics

Part # NTE748
Description  Integrated Circuit TV Sound Circuit
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Manufacturer  NTE [NTE Electronics]
Direct Link  http://www.nteinc.com
Logo NTE - NTE Electronics

NTE748 Datasheet(HTML) 2 Page - NTE Electronics

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Electrical Characteristics (Cont’d): (V+ = 12V, TA = +25°C, f = 4.5MHz, Deviation = ±25kHz
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Recovered Audio (Pin2)
VA
f = 4.5MHz, Deviation =
±25kHz, QL = 24, Note 1 0.35 0.50
–
Vrms
f = 5.5MHz, Deviation =
±50kHz, QL = 30, Note 1
–
0.80
–
Vrms
Audio Preamplifier
AVP
Open Loop Gain
–
25
–
dB
IF Voltage Gain
AVIF
–
65
–
dB
Parallel Input Resistance
Rin
–
9.0
–
k
Ω
Parallel Input Capacitance
Cin
–
6.0
–
pF
Nominal Zener Voltage
VReg
IZ = 5mA
–
11.6
–
V
Power Supply Current
ID
IZ = 5mA
–
31
–
mA
Power Dissipation
PD
IZ = 5mA
–
300
375
mW
Note 1. QL is loaded circuit Q.
VCC
Pin Connection Diagram
IF Output
Quadrature Network
1
2
3
4
Bypass
Audio Output
Bypass
IF Input
5
Bypass
6
Bypass
7
GND
14
13
12
11
Test Point
Quadrature Bypass
10 Preamp Output
9 Preamp Input
8
.600 (15.24)
17
14
8
.300
(7.62)
.200 (5.08)
Max
.100 (2.45)
.099 (2.5) Min
.785 (19.95)
Max


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