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TDA5745TS Folha de dados(PDF) 2 Page - NXP Semiconductors

Nome de Peças TDA5745TS
Descrição Electrónicos  Low power mixers/oscillators for hyperband tuners
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Fabricante Electrônico  PHILIPS [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA5745TS Folha de dados(HTML) 2 Page - NXP Semiconductors

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1998 Mar 09
2
Philips Semiconductors
Preliminary specification
Low power mixers/oscillators for
hyperband tuners
TDA5744; TDA5745
FEATURES
• Mixers/oscillators for hyperband tuners
• Balanced mixer with a common emitter input for VHF
(single input)
• Balanced mixer with a common base input for UHF
(double input)
• 4-pin common emitter oscillator for VHF
• 4-pin common emitter oscillator for UHF
• Electronic band switch
• IF amplifier with a low output impedance to drive the
SAW filter directly (
≈2kΩ load)
• Low power, low radiation and small size
• Pin compatible single-chip synthesizer mixer/oscillator
for Full Scale Tuners (FST) are available: TDA6404,
TDA6405 and TDA6405A.
APPLICATIONS
• Hyperband tuners for Europe using a 2-band
mixer/oscillator in a switched concept.
GENERAL DESCRIPTION
The TDA5744 and TDA5745 are 2-band mixers/oscillators
intended for VHF/UHF and hyperband tuners (see Fig.1).
The Integrated Circuits (ICs) include two double balanced
mixers and two oscillators, for the VHF and UHF band, and
an IF amplifier. With proper oscillator application and by
using a switchable inductor to split the VHF band into two
sub-bands (the full VHF/UHF and hyperband) the TV
bands can be covered. Two pins are available between
the mixer output and the IF amplifier input to enable IF
filtering for improved signal handling. Band selection is
made by band switch pin BS.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VCC
supply voltage
operating
4.5
5
5.5
V
ICC
supply current
58
mA
Tstg
IC storage temperature
−40
+150
°C
Tamb
operating ambient temperature
−20
+85
°C
fi(RF)
RF input frequency
VHF band
45.25
399.25 MHz
UHF band
407.25
855.25 MHz
GV
voltage gain
VHF band
27
dB
UHF band
38
dB
F
noise figure
VHF band
8
dB
UHF band
8.5
dB
Vo
output voltage causing 1% cross
modulation in channel
VHF band
119
dB
µV
UHF band
118
dB
µV
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA5744TS;
TDA5745TS
SSOP24
plastic shrink small outline package; 24 leads; body width 5.3 mm
SOT340-1


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