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STC3485E Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers

Part No. STC3485E
Description  3.3V-Powered, ±15kV ESD-Protected, and Slew-Rate-Limited True RS-485 Transceivers
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Maker  ETC1 [List of Unclassifed Manufacturers]
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STC3485E Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers

 
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STC3485E Datasheet Rev.0.1, Dec.2005
Page    of  11
STC International Limited                          http://www.mcu-memory.com
Pin Description
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
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
/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 and DE is low, the device will enter a low-power shutdown mode. If the
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
DI
Driver Input. A low on DI forces output B high and output A low. Similarly, a high on DI forces output
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
RO
Vcc
RE
DE
DI
GND
SO/DIP
Rt
DE
DI
RO
RE
RO
Vcc
RE
DE
DI
GND
STC3485E
Rt
TOP VIEW
DD
CC
CC
CC
DD
375 Ω
375 Ω
CM
-7V to +12V
ID
OV
OL
CL
(+)
OH
OH
(-)


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