ST485E ST Microelectronics, ST485E Datasheet - Page 3

• Manufacturer Part Number: ST485E
• Description: LOW POWER RS-485/RS-422 TRANSCEIVER
• Manufacturer: ST Microelectronics

ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS
DC ELECTRICAL CHARACTERISTICS
(V
(See Note 1)
Note 1: All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device ground
unless specified.
Note 2: Supply current specification is valid for loaded transmitters when V
Note 3: Applies to peak current. See typical Operating Characteristics.
Symbol
Symbol
I
I
V
V
CC
ESD
ESD
I
V
I
OSD1
OSD2
V
V
V
I
I
R
V
OZR
I
OSR
V
V
V
V
OD1
OD2
IN1
IN2
CC
OC
OH
TH
OL
IH
IN
OD
OC
IL
TH
= 5V 5%, T
ESD Protection Voltage
ESD Protection Voltage
Differential Driver Output
(No Load)
Differential Driver Output
(With Load)
Change in Magnitude of
Driver Differential Output
Voltage for Complementary
Output States
Driver Common-Mode
Output Voltage
Change in Magnitude of
Driver Common-Mode
Output Voltage for
Complementary Output
States
Input High Voltage
Input Low Voltage
Input Current
Input Current (A, B)
Receiver Differential
Threshold Voltage
Receiver Input Hysteresis
Receiver Output High
Voltage
Receiver Output Low
Voltage
3-State (High Impedance)
Output Current at Receiver
Receiver Input Resistance
No Load Supply Current
(Note 2)
Driver Short-Circuit Current,
V
Driver Short-Circuit Current,
V
Receiver Short-Circuit
Current
O
O
=High
=Low
Parameter
Parameter
A
= T
MIN
to T
MAX
Human Body Model
IEC-1000-4-2
R
R
R
R
R
RE, DE, DI
RE, DE, DI
RE, DE, DI
V
V
V
V
V
I
I
V
V
V
V
V
V
V
V
, unless otherwise specified. Typical values are referred to T
O
O
CM
IN
IN
CM
CM
O
CM
RE
DE
DE
O
O
O
L
L
L
L
L
= -4mA
= 4mA
= 27 (RS-485) (See Fig. 1)
= 50 (RS-422) (See Fig. 1)
= 27 or 50 (See Fig. 1)
= 27 or 50 (See Fig. 1)
= 27 or 50 (See Fig. 1)
= 0.4 to 2.4V
= -7 to 12V (Note 3)
= -7 to 12V (Note 3)
= 0V to V
= 12V
= -7V
= 0V or V
= V
= 0V
= 0V or 5.25V
= -7 to 12V
= 0V
= -7 to 12V
CC
Test Conditions
Test Conditions
CC
V
V
CC
ID
ID
= 200mV
= -200mV
DE
V
= 0V
DE
= 0V
Min.
Min.
-0.2
1.5
2.0
3.5
24
35
35
15
7
8
Typ.
Typ.
400
300
70
Max.
Max.
-0.8
900
500
250
250
0.2
0.2
0.8
0.2
0.4
95
5
5
5
3
1
2
1
A
ST485E
= 25°C)
Unit
Unit
mA
mA
mV
mA
mA
mA
K
KV
KV
V
V
V
V
V
V
V
V
V
V
V
A
A
A
A
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