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DS481 Datasheet, PDF (2/10 Pages) National Semiconductor (TI) – Low Power RS-485/RS-422 Multipoint Transceiver with Sleep Mode | |||
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Absolute Maximum Ratings (Note 3)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (VCC)
Enable Input Voltage
(RE (Note 1), DE)
Driver Input Voltage (DI)
Driver Output Voltage (A, B)
+12V
â0.5V to (VCC + 0.5V)
â0.5V to (VCC + 0.5V)
â14V to +14V
Receiver Input Voltage (A, B)
â14V to +14V
Receiver Output Voltage (RO)
â0.5V to (VCC + 0.5V)
Maximum Package Power Dissipation @ +25ËC
M Package
1.19W
N Package
0.74W
Derate M Package 9.5 mW/ËC above +25ËC
Derate N Package 6.0 mW/ËC above +25ËC
Maximum Package Power Dissipation @ +70ËC
M Package
N Package
Storage Temperature Range
Lead Temperature Range
(Soldering, 4 sec.)
ESD (HBM)
0.76W
0.47W
â65ËC to +150ËC
+260ËC
â¥2 kV
Recommended Operating
Conditions
Supply Voltage (VCC)
Operating Free Air
Temperature (TA)
DS481
DS481T
Bus Common Mode Voltage
Min
+4.75
0
â40
â7
Typ
+5.0
+25
+25
Max
+5.25
+70
+85
+12
Units
V
ËC
ËC
V
Electrical Characteristics
Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified (Notes 4, 5)
Symbol
Parameter
Conditions
Pin
Min Typ Max Units
VOD1
VOD2
âVOD
Differential Driver Output Voltage
Differential Driver Output Voltage
with Load
Change in Magnitude of Output
Differential Voltage
(No Load)
RL = 50â¦, (RS422), Figure 1
RL = 27â¦, (RS485), Figure 1
RL = 27⦠or 50⦠(Note 6)
A, B
1.5
5V
2 2.8
V
1.5 2.3 5 V
0.2 |V|
VOD3
VOC
âVOC
Differential Driver Output Voltage â
Full Load with Max VCM
Driver Common-Mode Output Voltage
Change in Magnitude of Common-Mode
Output Voltage
R1 = 54â¦, R2 = 375â¦
VTEST = â7V to +12V, Figure 2
RL = 27⦠or 50â¦, Figure 1
RL = 27⦠or 50â¦, Figure 1
(Note 6)
1.5 2.0 5 V
0
3V
0.2 |V|
VIH
Input High Voltage
VIL
Input Low Voltage
IIN1
Input Current
IIN2
Input Current (Note 7)
DE = 0V, VCC = 0V or 5.25V
VTH
âVTH
VOH
VOL
IOZR
RIN
Receiver Differential Threshold Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
TRI-STATE Output Current at Receiver
Receiver Input Resistance
VIN = 0V or VCC
VIN = +12V
VIN = â7V
VIN = +12V
VIN = â7V
â7V ⤠VCM ⤠+12V
VCM = 0V
IO = â4 mA, VID = 0.2V
IO = 4 mA, VID = â0.2V
0.4V ⤠V O ⤠2.4V
â7V ⤠VIN ⤠+12V
DS481
DS481T
DS481
DS481T
DI, DE, RE 2.0
(Note 1)
V
0.8 V
±2 µA
A, B
0 190 250 µA
0 â100 â200 µA
0 190 500 µA
0 â100 â400 µA
â0.2
0.2 V
70
mV
RO
3.5
V
0.5 V
±1 µA
A, B
48 68
kâ¦
24
ICC
No-Load Supply Current (Note 8)
ICCX
Sleep Mode Supply Current
IOSD1
IOSD2
IOSR
Driver Short Circuit Current, VO = HIGH
Driver Short Circuit Current, VO = LOW
Receiver Short Circuit Current
DE = V CC, RE (Note 1) = 0V or V
CC
DE = 0V, RE (Note 1) = 0V or VCC
DE = GND
RE (Note 1)= VCC (Figure 14)
â7V ⤠VO ⤠+12V
â7V ⤠VO ⤠+12V
VO = GND
V CC
VCC
A, B
RO
200 500 µA
200 500 µA
0.2 10 µA
250 mA
â250 mA
7
85 mA
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