MH88634CV-K
TIP
RING
XLA
XLD
XLB
XLC
IC
IC
IC
SHK
RX
VEE
TX
RV
FL
RL
VCC
AGND
LRC
VRLY
LRD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Data Sheet
Figure 2 - Pin Connections
Pin Description
Pin #
1
2
3
4
5
6
7-9
10
11
12
13
14
15
Name
TIP
RING
XLA
XLD
XLB
XLC
IC
SHK
RX
VEE
TX
RV
FL
Description
Tip Lead.
Connects to the "Tip" lead of a Telephone Line.
Ring Lead.
Connects to the "Ring" lead of a Telephone Line.
Loop Relay Contact A.
Connects to XLB through the Loop relay (K1) contacts when the
relay is activated.
Loop Relay Contact D.
Connects to XLC through the loop relay (K1) contacts, when the
relay is activated.
Loop Relay Contact B.
Connects to XLA through the loop relay (K1) contacts, when the
relay is activated.
Loop Relay Contact C.
Connects to XLD through the loop relay (K1) contacts, when the
relay is activated.
Internal Connection.
No connection should be made to this pin.
Switch Hook (Output).
A logic 0 indicates the presence of forward or reverse battery voltage
when LRC is logic 0 and the presence of forward or reverse loop current when LRC is logic 1.
Receive (Input).
4-Wire ground (AGND) referenced analog input.
Negative Supply Voltage.
-5V DC
Transmit (Output).
4-Wire ground (AGND) referenced analog output.
Ringing Voltage Detect (Output).
A logic low indicates that ringing voltage is across the Tip
and Ring leads.
Forward Loop Detect (Output).
In the on-hook state, a logic 0 output indicates that forward
loop battery is present. In the off-hook state, a logic 0 indicates that forward loop current is
present.
2
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
