M64886FP
Rev.1.0, Sep.22.2003, page 6 of 27
Pin Description (cont.)
Pin No.
Symbol
Pin Name
Functions
25
TVGND2
TX VCO ground 2
DC ground for TX VCO.
26
TXLA2
TX VCO LA2
TX VCO amplifier output A2.Connect to inductor.
27
TXLA1
TX VCO LA1
TX VCO amplifier output A1.
28
TVGND1
TX VCO ground 1
DC ground for TX VCO.
29
TXLB1
TX VCO LB1
TX VCO amplifier output B1. Connect to LA1.
30
TXLB2
TX VCO LB2
TX VCO amplifier output B2. Connect to inductor.
31
TVVCC
Power supply (TX VCO)
DC power supply to the TX VCO.
32
TXMOD
TX modulation input
TX modulation input from splatter filter output.
33
TXVT
TX VCO tuning voltage input
TX VCO tuning voltage input from PLL loop filter.
34
TXPD
TX charge pump output
Charge pump output pin of TX PLL.
When TX is off, Charge pump output is HiZ.
35
FILOUT
Splatter filter output
Splutter filter output pin.
36
FILIN
Splatter filter input
Splutter filter input pin.
37
COMPOUT
Compressor output
Compressor output pin .
38
C-DCF
Compander decouple
Internal compressor and expander reference voltage .
Decoupled to ground with capacitor .
39
MICOUT
Mic output
Mic amp output pin
40
MICIN
Mic input
Mic amp input pin .
41
COMPRECT
Compressor rectifier
Internal compressor rectifier voltage .
Decoupled to ground with capacitor .
42
COMPREF
Compressor reference
Internal compressor reference voltage.
Decoupled to ground with capacitor .
43
COMPVCC
Power supply (Compander)
DC power supply to the compressor and expander .
44
COMPGND
Compander ground
DC ground for compressor and expander .
45
SPREF
Speaker reference
Speaker reference voltage . Decoupled to ground with
capacitor .
46
SPOUT2
Speaker output 2
Speaker amp output pin 2 .
47
SPOUT1
Speaker output 1
Speaker amp output pin 1 .
48
SPIN
Speaker input
Speaker amp input pin 1 .
49
EXPOUT
Expander output
Expander output pin .
50
VOLCAP
Volume amplifier reference
Volume amplifier reference voltage.
Decoupled to ground with capacitor .
51
EXPRECT
Expander rectifier
Internal expander rectifier voltage.
Decoupled to ground with capacitor .
52
EXPIN
Expander input
Expander input pin . Demodulate signal input .