LV25700PM Datasheet, PDF (15/68 Pages) Sanyo Semicon Device – For Car Radio Single chip Tuner IC

LV25700PM
Continued from preceding page.
Pin name
Function
29 RD_DA
30 RD_CL
Discription
RDS demodulator signal output pins
Output Low when the RDF is OFF.
Internal Equivalent Circuit
29
32
1
33 RESET
34 BUS
35
D_VCC_5V
37 D_GND
36 VREG_3V
38 XTAL_OUT
39 XTAL_IN
40 XTAL_GND
41 RDS_LPF
44 AM/FM
S_METER (DC)
System reset pin
A low-level to this pin resets the system and
PC starts executing the program from
address 0. When power is turned on, it is
necessary to apply low-level to this pin for
50ms or more after the 8V/5V power supply
is stabilized (leaving this pin open is
inhibited).
See the RESET timing diagrams.
Power/GND pins
• BUS: Power supply for the main
microcontroller interface pins.
• DVCC5V, GDND: Main operating power
supply
Internal operating low-voltage output pin
Connect a bypass capacitor to this pin.
Pins connected to the 20.5MHz oscillating
element
XTAL_GND: X'tal oscillator circuit GND
RD_DA,RD_CL pin
33
12
3 2 ₃₆
+ _10μF
D_GND(PIN37)
1 39
2
38
20.5MHz
Low pass filter for RDS VCO
Used to form an external low pass filter
40
D_VCC_5V(PIN35)
XTALGND(PIN40)
Current drive type S-meter output
Pin 44: Eliminates the AC component by
external capacity.
Pin 57: Leaves the AC components
(Pin for NC noise extraction and for
neighboring interfering noise extraction)
D_GND(PIN37)
3.3kΩ
41
3.9nF
68nF
D_GND(PIN37)
IF_VCC(PIN74) RF_VCC(PIN2)
FM Vsm(AC)
FM Vsm(CC)
AM Vsm(AC)
AM Vsm
(DC)
300Ω 333Ω
4kΩ
Vsm(F11)
(DC)
2kΩ
15kΩ
5.3kΩ
4kΩ
57
44
IF_GND(PIN72)
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No.A1709-15/68