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-MIXER
AMOSC
AM-IFI1
6
40
41
36
44
82
2
32
20
19
13
15
14
9
12
24
16
18
17
39
37
33
35
35
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
FSI
FMDEM
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 k
Ω
)
MPXI
11
stereo decoder input (input impedance typical 150 k
Ω
)
LFI
12
loop-filter input
MUTE
13
mute input
AFLO
14
left channel output (output impedance typical 4.3 k
Ω
)
AFRO
15
right channel output (output impedance typical 4.3 k
Ω
)
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
