TDA5745TS datasheet(2/20 Pages) PHILIPS

2 / 20 page

1998 Mar 09

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

ICC

supply current

−

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

voltage gain

VHF band

−

UHF band

−

noise ﬁgure

VHF band

−

UHF band

−

8.5

−

output voltage causing 1% cross

modulation in channel

VHF band

−

119

−

µV

UHF band

−

118

−

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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