20
Pin No.
Pin Name
I/O
Description
________
RES
HCTR
VDD
FMIN
AMIN
VSS
E0
AIN
AOUT
AGND
TEST1
XIN
System reset input.
Universal counter dedicated input port.
Power supply pin.
FM VCO (local oscillator) input.
AM VCO (local oscillator) input.
Ground pin.
The main charge pump output.
Transistor used for the low-pass filter amplifier. Connect AGND to ground.
IC test pins. These pins must be tied to ground.
Connections for a 75kHz crystal oscillator element.
53
54
55
56
57
58
59
60
61
62
63
64
I
I
—
I
I
—
O
O
O
O
I
I
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9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
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