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DS36C278TN Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DS36C278TN
Description  Low Power Multipoint EIA-RS-485 Transceiver
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DS36C278TN Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Electrical Characteristics (Notes 3, 4) (Continued)
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
Symbol
Parameter
Conditions
Reference
Min
Typ
Max
Units
RECEIVER CHARACTERISTICS
I
B
Input Balance Test
RS = 500
(422) (Note 10)
±400
mV
V
OH
High Level Output Voltage
I
OH = −4 mA, VID = +0.2V
RO
Figure 11
3.5
4.6
V
V
OL
Low Level Output Voltage
I
OL = +4 mA, VID = −0.2V
0.3
0.5
V
I
OSR
Short Circuit Current
V
O = GND
RO
735
85
mA
I
OZR
TRI-STATE Leakage Current V
O = 0.4V to 2.4V
±1µA
DEVICE CHARACTERISTICS
V
IH
High Level Input Voltage
DE,
RE*,
DI
2.0
V
CC
V
V
IL
Low Level Input Voltage
GND
0.8
V
I
IH
High Level Input Current
V
IH =VCC
2µA
I
IL
Low Level Input Current
V
CC =5V
V
IL =0V
−2
µA
V
CC = +3.0V
−2
µA
I
CC
Power Supply Current
Driver and Receiver ON
V
CC
200
500
µA
I
CCR
(No Load)
Driver OFF, Receiver ON
200
500
µA
I
CCD
Driver ON, Receiver OFF
200
500
µA
I
CCZ
Driver and Receiver OFF
200
500
µA
Switching Characteristics (Notes 4, 9)
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
Symbol
Parameter
Conditions
Reference
Min
Typ
Max
Units
DRIVER CHARACTERISTICS
t
PHLD
Differential Propagation
Delay High to Low
R
L =54
Ω,C
L = 100 pF
Figures 5, 6
10
39
80
ns
t
PLHD
Differential Propagation
Delay Low to High
10
40
80
ns
t
SKD
Differential Skew
|t
PHLD −tPLHD|
0
1
10
ns
t
r
Rise Time
325
50
ns
t
f
Fall Time
325
50
ns
t
PHZ
Disable Time High to Z
C
L =15pF
Figures 7, 8
80
200
ns
t
PLZ
Disable Time Low to Z
RE*=L
Figures 9, 10
80
200
ns
t
PZH
Enable Time Z to High
C
L = 100 pF
Figures 7, 8
50
200
ns
t
PZL
Enable Time Z to Low
RE*=L
Figures 9, 10
65
200
ns
RECEIVER CHARACTERISTICS
t
PHL
Propagation Delay
High to Low
C
L =15pF
Figures 12, 13
30
210
400
ns
t
PLH
Propagation Delay
Low to High
30
190
400
ns
t
SK
Skew, |t
PHL −tPLH|
0
20
50
ns
t
PLZ
Output Disable Time
C
L =15pF
Figures 14, 15, 16
50
150
ns
t
PHZ
55
150
ns
t
PZL
Output Enable Time
40
150
ns
t
PZH
45
150
ns
www.national.com
3


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