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U2514B Datasheet

AM/FM Receiver for Digital Tuning with FM-Stereo Decoder

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U2514B
AM/FM Receiver for Digital Tuning with FM-Stereo Decoder
Description
The U2514B is an integrated bipolar radio suitable for
digital tuning systems. It contains a FM front end with
pre-amplifier and FM-stereo decoder as well as a
complete AM receiver and demodulator. Stop-signal
generation is implemented for FM and AM mode. This
circuit is designed for use in small radios, power packs
and multimedia applications
Features
D FM wideband AGC
D LO-buffer for digital tuning
D Integrated stop signal generation with true
AM/ FM discriminators
D Adjustable stop signal sensitivity
D Automatic stereo-mono-blend
D High cut
D Mute function
D Pilot canceller
D Supply voltage range 3 to 12 V
D Package: SSO28
Block Diagram
FMOSCE
FMOSCB
FMRF
653
FMIN
FMAGC
28
2
FM front end
OSCOUT
GNDRF
8
4
AFSM
FMDET
MPXOUT
15 11 25
FM IF +
demodulator
AM FM stop
signal detect
MPXIN
24
Matrix
decoder
+ HCC
Pilot PLL
18
OUTR
19
OUTL
21
LPF
20
CERES
23
CTRLB
1
AMIN
AM front end
AM IF +
demodulator
Control
unit
7 10 12 13
AMOSC
FMIFIN
IFOUT
AMIFIN
17
9 22
26
METER
CTRLA AMFM
AMSADJ
Figure 1.
V Ref
14
VREF
27
VS
GND
16
12305
TELEFUNKEN Semiconductors
Rev. A2, 04-Nov-96
Preliminary Information
1 (15)
TEMIC Semiconductors
TEMIC Semiconductors



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