Telephone Signalling Transceiver / Least Cost Router
CMX860
1.3
Signal List
CMX860
D6, D1, E1
Pin No.
1
2
3
Signal
Name
XTALN
XTAL/CLOCK
RDRVN
Type
O/P
I/P
O/P
The output of the on-chip Xtal oscillator inverter.
The input to the oscillator inverter from the Xtal
circuit or external clock source.
Relay drive output, low resistance pull down to
DV
SS
when active and medium resistance pull up
to DV
DD
when inactive.
The digital negative supply rail (ground).
Schmitt trigger input to the Ring signal detector.
Connect to DV
SS
if Ring Detector not used.
Open drain output and Schmitt trigger input
forming part of the Ring signal detector. Connect
to DV
DD
if Ring Detector not used.
An active-low reset pin.
The output of the Line Rx Input Amplifier.
The inverting input to the Line Rx Input Amplifier.
The non-inverting input to the Line Rx Input
Amplifier.
The output of the Phone Rx Input Amplifier.
The inverting input to the Phone Rx Input
Amplifier.
The non-inverting input to the Phone Rx Input
Amplifier.
The analogue negative supply rail (ground).
Internally generated bias voltage of approximately
AV
DD
/2, except when the device is in
‘Powersave’ mode when V
BIAS
will discharge to
AV
SS
. Should be decoupled to AV
SS
by a
capacitor mounted close to the device pins.
The inverted output of the Phone Tx Output
Driver.
The non-inverted output of the Phone Tx Output
Driver.
The inverted output of the Line Tx Output Driver.
The non-inverted output of the Line Tx Output
Driver.
The analogue positive supply rail. Levels and
thresholds within the device are proportional to
this voltage.
Open drain output and Schmitt trigger input
forming part of the Hook signal detector. Connect
to DV
DD
if Hook Detector not used.
Description
4
5
6
DV
SS
RD
RT
Power
I/P
BI
7
8
9
10
11
12
13
14
15
RESETN
LINERXF
LINERXN
LINERXP
PHONERXF
PHONERXN
PHONERXP
AV
SS
V
BIAS
I/P
O/P
I/P
I/P
O/P
I/P
I/P
Power
O/P
16
17
18
19
20
PHONETXN
PHONETXP
LINETXN
LINETXP
AV
DD
O/P
O/P
O/P
O/P
Power
21
HT
BI
©
2002 Consumer Microcircuits Limited
6
D/860/5
CMLMICRO [ CML MICROCIRCUITS ]
