MAX3430 Maxim, MAX3430 Datasheet - Page 8

• Manufacturer Part Number: MAX3430
• Description: 80V Fault-Protected / Fail-Safe / 1/4-Unit Load / #.3V RS-485 Transceiver
• Manufacturer: Maxim

±80V Fault-Protected, Fail-Safe,
1/4-Unit Load, +3.3V RS-485 Transceiver
Table 1. Transmitting
X = Don’t care.
8
RE
_______________________________________________________________________________________
X
X
0
1
PIN
1
2
3
4
5
6
7
8
INPUTS
DE
1
1
0
0
NAME
GND
V
RO
RE
DE
DI
A
B
CC
DI
1
0
X
X
Receiver Output
Receiver Output Enable. RO is enabled when RE is low; RO is high impedance when RE is high. The
device enters a low-power shutdown mode if RE is high and DE is low.
Driver Output Enable. Driving DE high enables the driver outputs. Pulling DE low puts the driver
outputs in a high-impedance state. If RE is high and DE is low, the device enters a low-power
shutdown mode. If the driver outputs are enabled, the device functions as a line driver, and when
they are high impedance it functions as a line receiver if RE is low.
Driver Input. A logic low on DI forces output A low and output B high, while a logic high on DI forces
output A high and output B low.
Ground
Noninverting Receiver Input/Driver Output
Inverting Receiver Input/Driver Output
Positive Supply, V
High-Z
High-Z
B
0
1
OUTPUTS
High-Z
High-Z
A
1
0
CC
= +3.3V ±10%. Bypass V
Shutdown
Normal
Normal
Normal
MODE
Table 2. Receiving
X = Don’t care.
RE
0
0
0
1
FUNCTION
CC
to GND with a 0.1µF ceramic capacitor.
INPUTS
DE
0
0
0
0
≤ -200mV
≥ -50mV
(A - B)
Inputs
open
X
Function Tables
Pin Description
OUTPUTS
High-Z
RO
1
0
1
Shutdown
Normal
Normal
Normal
MODE