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September 1994
4
Philips Semiconductors
Product specification
AM/FM stereo DTS radio circuit
TEA5712; TEA5712T
PINNING
SYMBOL
PIN
DESCRIPTION
IFCNT
AF-L
O
AF-R
O
PILFIL
FM-DEM
IFGND
FM-IF2
I
VSTAB
B
FM-IF1
O
AM-IF2
I/O
FM-IF1
I
VSTAB
A
FM-MIXER
AM-MIXER
AM-IF1
I
FM-RF
I
RFGND
AM-RF
I
RIPPLE
AM-AGC
FM-RF
O
SUBGND
FM-OSC
AM-OSC
V
P
IND
VCO/AM-FM SWITCH
AF
O
MPX
I
ST-LED
LPF-M/S
MUTE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
IF signal output for IF counting
left channel audio output (output impedance typ. 4.3 k
)
right channel audio output (output impedance typ. 4.3 k
)
pilot detector filter pin
ceramic discriminator pin
ground of IF, detector and MPX stages
second FM-IF input (input impedance typ. 330
)
stabilized internal supply voltage (B)
first FM-IF output (output impedance typ. 330
)
input/output to IFT; output: current source
first FM-IF input (input impedance typ. 330
)
stabilized internal supply voltage (A)
output to ceramic IF filter (output impedance typ. 330
)
open-collector output to IFT
input from IFT or ceramic filter (input impedance typ. 3 k
)
FM-RF aerial input (input impedance typ. 50
)
FM-RF ground
parallel tuned AM aerial circuit to ground (total input capacitance typ. 3 pF)
ripple capacitor pin
AGC capacitor pin
parallel tuned FM-RF circuit to ground
substrate and RF ground
parallel tuned FM-oscillator circuit to ground
parallel tuned AM-oscillator circuit to ground
positive supply voltage
stop signal output
VCO and switch terminal: open for AM; ground for FM
AM/FM AF output (output impedance typ. 5 k
)
input for stereo decoder (input impedance typ. 180 k
)
stereo indicator
pin for loop-filter and mono/stereo switch
mute pin