Datasheet

73M1866B/73M1966B Data Sheet DS_1x66B_001
12 Rev. 1.6
2.4 73M1916 32-Pin QFN Pinout
Figure 5 shows the 73M1916 32-pin QFN pinout.
6
7
8
9
5
4
3
2
1
17
18
19
20
24
23
22
21
10 11 12 13 14 15 16
32
31
30 29 28 27 26 25
CKO
OFH
CKI
VNX
SCP
MID
SCM
VPX
RST
DCD
TST
TXM
SACIN
RXM
RXP
VPS
RCT
BYP
SRE
SRB
VNS
VBG
ACS
VNS
73M1916
DCS
GPO
GPI
VNS/VND
RGP
RGN
DCI
DCG
Figure 5: 73M1916 32-Pin QFN Pinout
Table 4 describes the pin functions for the device. Decoupling capacitors on the power supplies should
be included for each pair of supply pins.
Table 4: 73M1916 32-Pin QFN Pin Definitions
Pin
Number
Pin
Name
Type Description
1 CKO O Test point for recovered clock
2 OFH O Off-hook control
3 CKI I Test input for clock
4 VNX GND Negative supply voltage
5 SCP I/O Positive side of the secondary pulse transformer winding
6 MID I/O Charge pump midpoint
7 SCM I/O Negative side of the secondary pulse transformer winding
8 VPX PWR Supply from the barrier
9
RCT
I
External rectification – disables internal rectifier when low,
leave open
10 BYP I Test pin, leave open
11 SRE I Voltage regulator sense
12 SRB O Voltage regulator drive
13 VNS GND Digital negative supply voltage
14
VBG
O
VBG bypass, connect to 0.1μF capacitor to VNS
15 ACS I AC current sense