DS_1x66B_001
73M1866B/73M1966B Data Sheet
2.2 73M1916 20-Pin TSSOP Pinout
Figure 3 shows the 73M1916 20-pin TSSOP pinout.
1
20
DCI
DCG
2
19
18
17
16
15
14
13
12
11
RGN
DCS
DCD
TXM
RGP
OFH
VNX
SCP
MID
3
4
5
6
RXM
RXP
VPS
VNS
ACS
73M1916
7
8
VPX
SRE
9
10
SRB
VBG
Figure 3: 73M1916 20-Pin TSSOP Pinout
Table 2 describes the pin functions for the device. Decoupling capacitors on the power supplies should
be included for each pair of supply pins.
Table 2: 73M1916 20-Pin TSSOP Pin Definitions
Pin
Pin Name
Type
Description
Number
1
DCI
I
DC loop input
2
RGN
RGP
OFH
VNX
SCP
MID
I
I
Ring detect negative voltage input
Ring detect positive voltage input
Off-hook control
3
4
O
5
GND
I/O
I/O
PWR
I
Negative supply voltage (line side of the barrier)
Positive side of the secondary pulse transformer winding
Charge pump midpoint
6
7
8
VPX
SRE
SRB
VBG
ACS
VNS
VPS
Supply from the barrier
9
Voltage regulator sense
10
11
12
13
14
O
Voltage regulator drive
O
VBG bypass, connect to 0.1 μF capacitor to VNS
AC current sense
I
GND
Analog negative supply voltage
PWRO Analog positive supply voltage (output)
15
16
17
18
19
20
RXP
RXM
TXM
DCD
DCS
DCG
I
I
Receive plus – signal input
Receive minus – signal input
Transmit minus – transhybrid cancellation output
DC loop output
O
O
I
DC loop current sense
O
DC loop control
Rev. 1.6
9
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
