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ST485E Datasheet(PDF) 3 Page - STMicroelectronics

Part No. ST485E
Description  ±5KV ESD PROTECTED, LOW POWER RS-485/RS-422 TRANSCEIVER
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST485E Datasheet(HTML) 3 Page - STMicroelectronics

 
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ST485E
3/13
ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS
DC ELECTRICAL CHARACTERISTICS
(VCC =5V ± 5%, TA =TMIN to TMAX , unless otherwise specified. Typical values are referred to TA = 25°C)
(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 VDE =0V
Note 3: Applies to peak current. See typical Operating Characteristics.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
ESD
ESD Protection Voltage
Human Body Model
±15
KV
ESD
ESD Protection Voltage
IEC-1000-4-2
±8KV
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VOD1
Differential Driver Output
(No Load)
5V
VOD2
Differential Driver Output
(With Load)
RL =27Ω (RS-485) (See Fig. 1)
RL =50Ω (RS-422) (See Fig. 1)
1.5
5
5
V
V
∆V
OD
Change in Magnitude of
Driver Differential Output
Voltage for Complementary
Output States
RL =27Ω or 50Ω (See Fig. 1)
0.2
V
VOC
Driver Common-Mode
Output Voltage
RL =27Ω or 50Ω (See Fig. 1)
3
V
∆V
OC
Change in Magnitude of
Driver Common-Mode
Output Voltage for
Complementary Output
States
RL =27Ω or 50Ω (See Fig. 1)
0.2
V
VIH
Input High Voltage
RE, DE, DI
2.0
V
VIL
Input Low Voltage
RE, DE, DI
0.8
V
IIN1
Input Current
RE, DE, DI
± 2
µA
IIN2
Input Current (A, B)
VCM = 0V or 5.25V
VDE =0V
VIN = 12V
VIN = -7V
1
-0.8
mA
mA
VTH
Receiver Differential
Threshold Voltage
VCM = -7 to 12V
-0.2
0.2
V
∆V
TH
Receiver Input Hysteresis
VCM =0V
70
mV
VOH
Receiver Output High
Voltage
IO = -4mA
VID = 200mV
3.5
V
VOL
Receiver Output Low
Voltage
IO =4mA
VID = -200mV
0.4
V
IOZR
3-State (High Impedance)
Output Current at Receiver
VO = 0.4 to 2.4V
± 1
µA
RIN
Receiver Input Resistance
VCM = -7 to 12V
24
K
ICC
No Load Supply Current
(Note 2)
VRE =0V orVCC
VDE =VCC
VDE =0V
400
300
900
500
µA
µA
IOSD1
Driver Short-Circuit Current,
VO=High
VO = -7 to 12V (Note 3)
35
250
mA
IOSD2
Driver Short-Circuit Current,
VO=Low
VO = -7 to 12V (Note 3)
35
250
mA
IOSR
Receiver Short-Circuit
Current
VO =0V toVCC
795
mA


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