Datasheet

+3.3V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
MAX3070E/MAX3073E/MAX3076E
Pin Description (continued)
PIN
MAX3070E
MAX3073E
MAX3076E
MAX3071E
MAX3074E
MAX3077E
MAX3072E
MAX3075E
MAX3078E
MAX3079E
FULL-DUPLEX
DEVICES
HALF-
DUPLEX
DEVICES
FULL-
DUPLE
X MODE
HALF-
DUPLE
X MODE
NAME FUNCTION
12 8 — 12 — A Noninverting Receiver Input
— — — — 12 A Receiver Input Resistors*
— — 6 — — A
Noninverting Receiver Input and Noninverting Driver
Output
— — — 13 13 RXP
Receiver Phase. Connect RXP to GND or leave
unconnected for normal transmitter phase/polarity.
Connect to V
CC
to invert receiver phase/polarity.
14 1 8 14 14 V
CC
Positive Supply V
CC
= 3.3V ±10%. Bypass V
CC
to GND
with a 0.1μF capacitor.
1, 8, 13 — — — — N.C.
No Connect. Not internally connected. Can be
connected to GND.
* MAX3079E only. In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) still have a
1/8-unit load, but are not connected to the receiver.
TRANSMITTING
INPUTS OUTPUTS
RE DE DI Z Y
X1101
X1010
0 0 X High-Z High-Z
1 0 X Shutdown
RECEIVING
INPUTS OUTPUT
RE DE A, B RO
0X≥ -50mV 1
0X≤ -200mV 0
0X
Open/
shorted
1
1 1 X High-Z
1 0 X Shutdown
MAX3071E/MAX3074E/MAX3077E
TRANSMITTING
INPUT OUTPUTS
DI Z Y
101
010
RECEIVING
INPUTS OUTPUT
A, B RO
≥ -50mV 1
≤ -200mV 0
Open/shorted 1
Function Tables
MAX3070E–MAX3079E
Maxim Integrated
13