MAX14945 Datasheet, PDF (12/21 Pages) Maxim Integrated Products – 2.75kVRMS Isolated 500kbps Half-Duplex RS-485

MAX14945
Pin Configuration
2.75kV_RMS Isolated 500kbps Half-Duplex RS-485/
RS-422 Transceiver with ±30kV ESD Protection
TOP VIEW
VDDA 1
GNDA 2
RXD 3
RE 4
DE 5
TXD 6
SBA 7
GNDA 8
+
MAX14945
WIDE SOIC
16 VDDB
15 GNDB
14 N.C.
13 B
12 A
11 VLDO
10 N.C.
9 GNDB
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 – VB)
3
RXD
GNDA
> -50mV 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. Drive RE low or connect to GNDA to enable RXD. Drive RE high to
4
RE
GNDA
disable RXD. RXD is high-impedance when RE is high. RE has an internal 4.5µA pulldown
to GNDA.
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