BLOCK DIAGRAM
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PRESCALER
PROGRAMMABLE
COUNTER
STABILIZER
WINDOW
DETECTOR
LAST-STATION
MEMORY
AM/FM
INDICATOR
IN-LOCK
DETECTOR
FM
DETECTOR
PILOT
DETECTOR
CHARGE
PUMP
MULTIPLEXER
CRYSTAL
OSCILLATOR
SHIFT REGISTER
FM
FRONT-END
FM
OSCILLATOR
FM
IF2
FM
IF1
FM
MIXER
SEQUENTIAL
CIRCUIT
STATUS
REGISTER
AM
FRONT-END
AM
OSCILLATOR
AM
DETECTOR
V/I
CONVERTER
AM
MIXER
AM
IF
AGC
AFC
hard mute
level
PLL
DECODER
MATRIX
SDS
MUTE
up
down
level
RFGND
DATA
BUS-CLOCK
WRITE-ENABLE
FM-RFI
V
STAB(A)
V
STAB(B)
AM-RFI
XTAL
RIPPLE
25
23
1
26
30
31
2
AGC
AM-IFI/O2
AM-MIXERAMOSC
AM-IFI1
6
40 41
36 44
822
32
20
19
13
15
14
9
12
24
16
181739 37 333535
38
43
42
28
27
29
34
7
21
10
11
4
MO/ST
AFRO
MUTE
AFC
(n)
AFC
(p)
AFC
VCO
LFI
PILFIL
AFLO
stereo
stereo
mono
38 kHz
19 kHz
FM-IFI1 FM-IFI2
FM-IFO1
FM-MIXER
FMOSC
FM-RFO
V
CC1
V
DDD
TEA5757;
TEA5759
FM
AM
DGND
P1
P0
TUNE
RFGND
MPXI
AFO
V
CC2
IFGND FSIFMDEM
MHA111
SYMBOL PIN DESCRIPTION
RIPPLE 1 ripple capacitor input
AM-RFI 2 AMRF input
FM-RFO 3 parallel tuned FMRF circuit to ground
RFGND 4 RF ground and substrate
FMOSC 5 parallel tuned FM-oscillator circuit to ground
AMOSC 6 parallel tuned AM-oscillator circuit to ground
V
CC1
7 supply voltage
TUNE 8 tuning current output
VCO 9 voltage controlled oscillator input
AFO 10 AM/FM AF output (output impedance typical 5 kΩ)
MPXI 11 stereo decoder input (input impedance typical 150 kΩ)
LFI 12 loop-filter input
MUTE 13 mute input
AFLO 14 left channel output (output impedance typical 4.3 kΩ)
AFRO 15 right channel output (output impedance typical 4.3 kΩ)
PILFIL 16 pilot detector filter input
IFGND 17 ground of IF, detector and MPX stage
FMDEM 18 ceramic discriminator input
AFC
(n)
19 AFC negative output
AFC
(p)
20 AFC positive output
FSI 21 field-strength indicator
V
CC2
22 supply voltage for tuning
V
DDD
23 digital supply voltage
MO/ST 24 mono/stereo and tuning indication output
XTAL 25 crystal input
DGND 26 digital ground
BUS-CLOCK 27 bus-clock input
DATA 28 bus data input/output
WRITE-ENABLE 29 bus write-enable input
P0 30 programmable output port (P0)
P1 31 programmable output port (P1)
AFC 32 450 kHz LC-circuit
FM-IFI2 33 FMIF input 2 (input impedance typical 330 Ω)
V
STAB(B)
34 internal stabilized supply voltage (B)
FM-IFO1 35 FMIF output 1 (output impedance typical 330 Ω)
AM-IFI/O2 36 input/output to IF-Tank (IFT); output: current source
FM-IFI1 37 FMIF input 1 (input impedance typical 330 Ω)
V
STAB(A)
38 internal stabilized supply voltage (A)
FM-MIXER 39 ceramic filter output (output impedance typical 330 Ω)
AM-MIXER 40 open-collector output to IFT
TEA5757 INTERNAL IC DIAGRAM
TEA5757 PIN DESCRIPTION
6-2
6-2
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