MAX14852 Datasheet, PDF (13/22 Pages) Maxim Integrated Products – 2.75kVRMS Isolated 500kbps/25Mbps Full-Duplex

MAX14852/MAX14854
Pin Configuration
2.75kV_RMS Isolated 500kbps/25Mbps Full-Duplex
RS-485/RS-422 Transceivers
with ±35kV ESD Protection
TOP VIEW
VDDA 1
GNDA 2
RXD 3
RE 4
DE 5
TXD 6
SBA 7
GNDA 8
+
MAX14852
MAX14854
16 VDDB
15 GNDB
14 A
13 B
12 Z
11 Y
10 VLDO
9 GNDB
WIDE SOIC
Pin Description
PIN
NAME REFERENCE
FUNCTION
1
VDDA
GNDA
UART/Logic-Side Power Input. Bypass VDDA to GNDA with both 0.1µF and 1µF
capacitors as close to the device as possible.
2, 8
GNDA
-
UART/Logic-Side Ground. GNDA is the ground reference for digital signals.
Receiver Data Output. Drive RE low to enable RXD. With RE low, RXD is high when (VA –
3
RXD
GNDA VB) > -10mV and is low when (VA – VB) < -200mV. RXD is high when VDDB is less than
VUVLOB. RXD is high impedance when RE is high.
Receiver Output Enable. Driver RE low or connect to GNDA to enable RXD. Drive RE high
4
RE
GNDA to disable RXD. RXD is high-impedance when RE is high. RE has an internal 4.5µA pull-
down to GNDA.
Driver Output Enable. Drive DE high to enable bus driver outputs Y and Z. Drive DE low or
5
DE
GNDA connect to GNDA to disable Y and Z. Y and Z are high impedance when DE is low. DE has
an internal 4.5µA pull-down to GNDA.
Driver Input. With DE high, a low on TXD forces the noninverting output (Y) low and the
6
TXD
GNDA inverting output (Z) high. Similarly, a high on TXD forces the noninverting output high and
the inverting output low. TXD has an internal 4.5µA pull-up to VDDA.
7
SBA
GNDA
Side B Active Indicator Output. SBA asserts low when side B is powered and working. SBA
has an internal 5kΩ pull-up resistor to V_DDA.
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