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| DS485_15 Datasheet, PDF (3/16 Pages) Texas Instruments – Low Power RS-485/RS-422 Multipoint Transceiver | |||
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DS485
www.ti.com
SNLS122C â JULY 1998 â REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS
Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified(1)(2)
Symbol
Parameter
Conditions
Pin Min Typ Max Units
VOD1
VOD2
ÎVOD
Differential Driver Output Voltage
Differential Driver Output Voltage
with Load
Change in Magnitude of Output
Differential Voltage
(No Load)
RL = 50Ω, (RS422), See Figure 2
RL = 27Ω, (RS485), See Figure 2
RL = 27Ω or 50Ω(3)
A, B
5
V
2
2.8
V
1.5 2.3
5
V
0.2
|V|
VOD3
VOC
ÎVOC
Differential Driver Output Voltageâ
Full Load with Max VCM
Driver Common-Mode Output Voltage
Change in Magnitude of Common-Mode
Output Voltage
R1 = 54Ω, R2 = 375Ω
VTEST = â7V to +12V, See Figure 6
RL = 27Ω or 50Ω, See Figure 2
RL = 27Ω or 50Ω, See Figure 2(3)
1.5 2.0
5
V
3
V
0.2
|V|
VIH
VIL
IIN1
IIN2
VTH
ÎVTH
VOH
VOL
IOZR
RIN
ICC
Input High Voltage
Input Low Voltage
Input Current
Input Current(4)
DE = 0V, VCC = 0V or 5.25V
Receiver Differential Threshold Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
TRI-STATE Output Current at Receiver
Receiver Input Resistance
No-Load Supply Current(5)
IOSD1
IOSD2
IOSR
Driver Short Circuit Current, VO = HIGH
Driver Short Circuit Current, VO = LOW
Receiver Short Circuit Current
VIN = 0V or VCC
VIN = +12V
VIN = â7V
â7V ⤠VCM ⤠+12V
VCM = 0V
IO = â4 mA, VID = 0.2V
IO = 4 mA, VID = â0.2V
0.4V ⤠VO ⤠2.4V
â7V ⤠VIN ⤠+12V
DE = VCC, RE* = 0V or VCC
DE = 0V, RE* = 0V or VCC
â7V ⤠VO ⤠+12V
â7V ⤠VO ⤠+12V
0V ⤠VO ⤠VCC
DI,
2.0
DE,
RE*
V
0.8
V
±2
μA
A, B
1.0
mA
â0.8 mA
â0.2
0.2
V
70
mV
RO
3.5
V
0.4
V
±1
μA
A, B
12
kΩ
VCC
200 900
μA
200 500
μA
A, B
35
250 mA
35
250 mA
RO
7
85
mA
(1) Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground
except VOD1/2/3 and VID.
(2) All typicals are given for: VCC = +5.0V, TA = +25°C.
(3) Î|VOD| and Î|VOC| are changes in magnitude of V OD and VOC respectively, that occur when the input changes state.
(4) IIN2 includes the receiver input current and driver TRI-STATE leakage current.
(5) Supply current specification is valid for loaded transmitters when DE = 0V or enabled (DE = H) with no load.
Copyright © 1998â2013, Texas Instruments Incorporated
Product Folder Links: DS485
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