Datasheet
DS36C279
www.ti.com
SNLS098B –JULY 2000–REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS
(1)(2)
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
Symbol Parameter Conditions Reference Min Typ Max Unit
s
DIFFERENTIAL DRIVER CHARACTERISTICS
V
OD1
Differential Output Voltage I
O
= 0 mA (No Load) (422) 1.5 5.0 V
(485)
V
OD0
Output Voltage I
O
= 0 mA 0 5.0 V
(Output to GND)
V
OD0*
Output Voltage 0 5.0 V
V
OD2
Differential Output Voltage R
L
= 50Ω (422) See 2.0 2.8 V
(Termination Load) Figure 2
R
L
= 27Ω (485) 1.5 2.3 5.0 V
ΔV
OD2
Balance of V
OD2
R
L
= 27Ω or 50Ω See
(3)
(422, 485) −0.2 0.1 +0.2 V
|V
OD2
− V
OD2*
|
V
OD3
Differential Output Voltage R1 = 54Ω, R2 = 375Ω See Figure 3 1.5 2.0 5.0 V
(Full Load) V
TEST
= −7V to +12V
V
OC
Driver Common Mode R
L
= 27Ω (485) See 0 3.0 V
Output Voltage Figure 2
R
L
= 50Ω (422) 0 3.0 V
ΔV
OC
Balance of V
OC
R
L
= 27Ω or See
(3)
−0.2 +0.2 V
|V
OC
− V
OC*
| R
L
= 50Ω (422, 485)
I
OSD
Driver Output Short-Circuit V
O
= +12V (485) See Figure 5 200 +250 mA
Current
V
O
= −7V (485) −190 −250 mA
RECEIVER CHARACTERISTICS
V
TH
Differential Input High V
O
= V
OH
, I
O
= −0.4 mA +0.035 +0.2 V
Threshold Voltage −7V ≤ V
CM
≤ +12V
See
(4)
(422, 485)
V
TL
Differential Input Low V
O
= V
OL
, I
O
= 0.4 mA −0.2 −0.035 V
Threshold Voltage −7V ≤ V
CM
≤ +12V
V
HST
Hysteresis V
CM
= 0V See
(5)
70 mV
R
IN
Input Resistance −7V ≤ V
CM
≤ +12V DS36C279T 24 68 kΩ
DS36C279 48 68 kΩ
I
IN
Line Input Current Other Input = 0V, DS36C279 V
IN
= +12V 0 0.19 0.25 mA
See
(6)
DE = V
IL
, RE* = V
IL
,
V
IN
= −7V 0 −0.1 −0.2 mA
V
CC
= 4.75 to 5.25
DS36C279T V
IN
= +12V 0 0.19 0.5 mA
or 0V
V
IN
= −7V 0 −0.1 −0.4 mA
I
ING
Line Input Current Glitch Other Input = 0V, DS36C279 V
IN
= +12V 0 0.19 0.25 mA
See
(6)
DE = V
IL
, RE* = V
IL
,
V
IN
= −7V 0 −0.1 −0.2 mA
V
CC
= +3.0V or 0V, DS36C279T V
IN
= +12V 0 0.19 0.5 mA
T
A
= 25°C
V
IN
= −7V 0 −0.1 −0.4 mA
I
B
Input Balance Test RS = 500Ω (422) See
(7)
±400 mV
V
OH
High Level Output Voltage I
OH
= −4 mA, V
ID
= +0.2V 3.5 4.6 V
RO
See Figure 12
V
OL
Low Level Output Voltage I
OL
= +4 mA, V
ID
= −0.2V 0.3 0.5 V
I
OSR
Short Circuit Current V
O
= GND RO 7 35 85 mA
I
OZR
TRI-STATE Leakage Current V
O
= 0.4V to 2.4V ±1 μA
(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 V
OD1
and V
OD2
.
(2) All typicals are given for: V
CC
= +5.0V, T
A
= + 25°C.
(3) Delta |V
OD2
| and Delta |V
OC
| are changes in magnitude of V
OD2
and V
OC
, respectively, that occur when input changes state.
(4) Threshold parameter limits specified as an algebraic value rather than by magnitude.
(5) Hysteresis defined as V
HST
= V
TH
− V
TL
.
(6) I
IN
includes the receiver input current and driver TRI-STATE leakage current.
(7) For complete details of test, see RS-485.
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