STC3485E Datasheet, PDF (5/11 Pages) List of Unclassifed Manufacturers – 3.3V-Powered, ±15kV ESD-Protected, and Slew-Rate-Limited True RS-485 Transceivers

Pin Description
PIN
NAME
FUNCTION
1
RO Receiver Output. If A > B by -50mV, RO will be high; if A < B by 200mV, RO will be low.
2
Receiver Output Enable. RO is enabled when RE is low; RO is high impedance when RE is high. If RE
/RE
is high and DE is low, the device will enter a low-power shutdown mode.
Driver Output Enable. The driver outputs are enabled by bringing DE high. They are high impedance
3
when DE is low. If /RE is high and DE is low, the device will enter a low-power shutdown mode. If the
DE
driver outputs are enabled, the parts function as line drivers. While they are high impedance, they
function as line receivers if /RE is low.
4
Driver Input. A low on DI forces output B high and output A low. Similarly, a high on DI forces output
DI
B low and output A high.
5
GND Ground
6
A
Noninverting Receiver Input and Noninverting Driver Output
7
B
Inverting Receiver Input and Inverting Driver Output
8
VCC Positive Supply: 3.0V VCC 3.6V
Figure 1. STC3485E Pin Configuration and Typical Operating Circuit
Figure 2. Driver VOD and VOC
Figure 3. Driver VOD with Varying Common-Mode Voltage
Figure 4. Receiver VOH and VOL