TDA7427A Datasheet, PDF (3/21 Pages) STMicroelectronics – AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER

TDA7427A
PIN DESCRIPTION
PIN
SYMBOL
DESCRIPTION
1
LP_FM
Filter OPAMP input, charge pump output (FM mode)
2
LP_HC
Filter OPAMP input, charge pump output (high current mode)
3
LP_AM
Filter OPAMP input, charge pump output (AM mode)
4
VREF
OPAMP reference voltage
5
DOUT3
Digital Output 3 (open collector)
6
DOUT4
Digital Output 4 (open collector)
7
DOUT5
Digital Output 5 (open collector)
8
DOUT6
Digital Output 6 (open collector)
9
OSCIN
Reference Oscillator Input
10 _{OSCOUT Reference Oscillator Output}
11 _N.C.
12 SCL
13 SDA
Not connected
I²C bus clock input
I²C bus data I/O
14 IF_AM
IF counter HF input
15 IF_FM
IF counter VHF input
16 _{SSTOP IF counter result output}
17* DOUT1 Digital output 1 (push-pull)
17* _{INLOCK Inlock detector output}
18 _{DOUT2 Digital Output 2 (open collector)}
19 HF-REF HF reference pin
20 ADDR
I²C bus address pin
21 VDD1
Supply Voltage
22 GND-DIG Digital ground
23 _N.C.
Not connected
24 FM_IN
High frequency input FM
25 _{AM_IN}
High frequency input AM
26 GND-AN Analog ground
27 VDD2
Supply Voltage
28 LP_OUT Filter OPAMP output
* Pin function is selectable by software (see software specification)
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