MAX14948 Datasheet, PDF (12/21 Pages) Maxim Integrated Products – 5kVRMS Isolated 500kbps Half-Duplex RS-485

MAX14948
Pin Configuration
5kV_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
+
MAX14948
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 –
3
RXD
GNDA
VB) > -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. 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.
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