Datasheet

ST3485EB, ST3485EC, ST3485EI, ST3485EIY
Pin configuration
DocID9102 Rev 11
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1 Pin configuration
Figure 1: Pin connections
Table 2: Pin description
Pin n°
Symbol
Name and function
1
RO
Receiver output. If A > B by 200 mV, RO will be high; if A < B by 200
mV, RO will be low.
2
RE
Receiver output enable. RO is enabled when RE is low; RO is high
impedance when RE is high. If RE is high and DE is low, the
device will enter a low power shutdown mode.
3
DE
Driver output enable. The driver outputs are enabled by bringing DE
high. They are high impedance when DE is low. If RE is high DE is
low, the device will enter a low-power shutdown mode. If the driver
outputs are enabled, the part functions as line driver, while they are
high impedance, it functions as line receivers if RE is low.
4
DI
Driver input. A low on DI forces output A low and output B high.
Similarly, a high on DI forces output A high and output B low.
5
GND
Ground.
6
A
Non-inverting receiver input and non-inverting driver output.
7
B
Inverting receiver input and inverting driver output.
8
VCC
Supply voltage: V
CC
= 3 V to 3.6 V.
RO
RE
DE
DI
VCC
GND
B
A
1
2
3
4
8
7
6
5