Tone Detector
FX105A
1.3
Signal List
Package
D4/P3
Pin No.
1
Signal
Description
Name
INPUT AMP IN
Type
I/P
AC couple to this input of the input buffer
amplifier.
The input buffer amplifier output.
The input to the Detect/Word filter.
The input to the VCO loop filter.
Word filter capacitor pin A.
Word filter capacitor pin B.
VCO Loop filter capacitor pin A.
VCO Loop filter capacitor pin B.
Open drain CMOS output, active on detect.
Note that a load resistor to V
SS
is required.
Ground.
Bandwidth control resistor pin A.
Bandwidth control resistor pin B.
VCO capacitor B.
VCO capacitor A.
VCO discharge resistor. When potentiometer
tuning is required, a series resistor is
recommended to prevent possible shorting to
ground.
Power supply.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
INPUT AMP OUT
RW
RV
C3A
C3B
C2A
C2B
DETECT OUT
V
SS
R2HI
R2LO
C1B
C1A
R1
O/P
I/P
I/P
O/P
O/P
O/P
O/P
O/P
Power
I/P
I/P
O/P
O/P
I/P
16
V
DD
Power
Notes:
I/P =
O/P =
Input
Output
©
1999 Consumer Microcircuits Limited
4
D/105A/5
CMLMICRO [ CML MICROCIRCUITS ]
