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ST485ACN Scheda tecnica(PDF) 6 Page - STMicroelectronics

Il numero della parte ST485ACN
Spiegazioni elettronici  Very high speed low power RS-485/RS-422 transceiver
PDF  19 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST485ACN Scheda tecnica(HTML) 6 Page - STMicroelectronics

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Electrical characteristics
ST485A
6/19
4
Electrical characteristics
(VCC = 4.5V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are
referred to TA = 25°C, VCC = 5V) (Note: 1)
4.1
Logic input
(VCC = 4.5V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are
referred to TA = 25°C, VCC = 5V) (Note: 1)
4.2
Transmitter
(VCC = 4.5V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are
referred to TA = 25°C, VCC = 5V) (Note: 1)
Table 5.
DC Electrical characteristics
Symbol
Parameter
Test conditions
Min
Typ
Max
Unit
ISUPPLY VCC Power supply current
No load, VRE=0V or VCC
VDE = VCC
2.3
5
mA
VDE = 0V
2.6
5
mA
CI/O
Input/output capacitance
10
pF
CAB
Driver output capacity
10
pF
Table 6.
Logic input electrical characteristics
Symbol
Parameter
Test conditions
Min
Typ
Max
Unit
VIL
Input logic threshold low
DE, DI, RE
0.8
V
VIH
Input logic threshold high
DE, DI, RE
2
V
IIN1
Logic input current
DE, DI, RE
± 2.0
µA
IIN2
Input current (A, B)
VDE=0V, VCC= 0 or 5.25V
VIN=12V
1
mA
VIN=-7V
-0.8
mA
Table 7.
Transmitter electrical characteristics
Symbol
Parameter
Test conditions
Min
Typ
Max
Unit
VOD1
Differential driver output (No load)
5
V
VOD2
Differential driver output (with load)
RL= 54Ω (RS-422) VCM= -7V to 12V
1.5
2.7
5
V
∆V
OD
Change in magnitude of driver
differential output voltage for
complementary output states
(Note: 1)
RL= 27Ω or 50Ω
00.2
V
VOC
Driver common mode output
voltage
RL= 27Ω or 50Ω
13
V
∆V
OC
Change in magnitude of driver
common mode output voltage
(Note: 1)
RL= 54Ω or 100Ω
00.2
V
IOSD
Driver short circuit output current
VO= -7V to 12V
± 250
mA



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