Call Progress Tone Detector
4
MX643 - Preliminary Information
2. Signal List
P-Pin
No.
1
DW-Pin
No.
2
Signal
CLOCK / XTAL
Type
input
Description
For the MX643P this is the external clock input to the clock
divider circuit. For the MX643DW this can be either an
external clock input or an external crystal input.
Output of the on-chip oscillator. Not available on 8-pin DIP..
When a single tone is within the range of the Call Progress
Band, Non Call Progress Band, or a Special Information
Tone, is detected, this output goes to a logic 1.
A logic 1 applied to this input enables the decoder and
detection outputs. A logic 0 applied to this input disables the
decoder and forces DETECT1, DETECT2 and DETECT3 to a
logic 0.
When a call progress signal is detected, this output goes to a
logic 1.
Signal input. Signals to this pin should be ac coupled. The dc
bias of this pin is set internally.
Negative supply. (ground).
This output is used in conjunction with DETECT1. When
DETECT1 is at a logic 1, this output goes to a logic 1 if a Call
Progress High Band signal is detected. When DETECT1 is
at a logic 0, this output goes to a logic 1 if a Non Call
Progress signal is detected.
Positive supply. This pin should be decoupled to V
SS
by a
capacitor.
Internal connection. Do not make a connection to these pins.
-
2
3
4
XTAL
DETECT3
output
output
3
5
ENABLE
input
4
5
6
7
7
10
12
13
DETECT1
SIGIN
V
SS
DETECT2
output
input
power
output
8
15
1, 6, 8,
9, 11,
14, 16
V
DD
N/C
power
© 1996 MX•COM, INC.
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Doc. #20480148.001
CMLMICRO [ CML MICROCIRCUITS ]
