MAX14852 Datasheet, PDF (14/22 Pages) Maxim Integrated Products – 2.75kVRMS Isolated 500kbps/25Mbps Full-Duplex

MAX14852/MAX14854
2.75kV_RMS Isolated 500kbps/25Mbps Full-Duplex
RS-485/RS-422 Transceivers
with ±35kV ESD Protection
Pin Description (continued)
PIN
NAME REFERENCE
FUNCTION
9, 15
GNDB
-
Cable Side Ground. GNDB is the ground reference for the internal LDO and the RS-485/
RS-422 bus signals.
LDO Power Input. Connect a minimum voltage of 3.18V to VLDO to power the cable side
10
VLDO
GNDB
of the transceiver. Bypass VLDO to GNDB with both 0.1µF and 1µF capacitors as close to
the device as possible. To disable the internal LDO, leave VLDO unconnected or connect to
GNDB.
11
Y
GNDB Noninverting Driver Output
12
Z
GNDB Inverting Driver Output
13
B
GNDB Inverting Receiver Input
14
A
GNDB Noninverting Receiver Input
Cable Side Power Input/Isolated LDO Power Output. Bypass VDDB to GNDB with both
0.1µF and 1μF capacitor as close to the device as possible. V_DDB is the output of the
16
VDDB
GNDB internal LDO when power is applied to VLDO. When the internal LDO is not used (VLDO is
unconnected or connected to GNDB), VDDB is the positive supply input for the cable side
of the IC.
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