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