DS481TM National Semiconductor, DS481TM Datasheet - Page 3

• Manufacturer Part Number: DS481TM
• Description: IC, TXRX, RS485/422, W/SLEEP, 8SOIC
• Manufacturer: National Semiconductor

Specifications of DS481TM

• Device Type: Line Driver / Receiver
• No. Of Drivers: 1
• Supply Voltage Range: 4.75V To 5.25V
• Driver Case Style: SOIC
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC
• Interface Type: RS422, RS485
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
f
PLHD
PHLD
SKEW
r
f
ZH
ZL
LZ
HZ
PSH
PSL
PLHD
PHLD
SKEW
ZH
ZL
LZ
HZ
PSH
PSL
SLEEP
max
Switching Characteristics
Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified (Notes 5, 9, 10)
Note 3: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.
Note 4: 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
V
Note 5: All typicals are given for: V
Note 6: ∆|V
Note 7: I
Note 8: Supply current specification is valid for loaded transmitters when DE = 0V or enabled (DE = H) with no load.
Note 9: f = 1 MHz, t
Note 10: C
Note 11: f
rate unit interval (1/f
Note 12: For enable from sleep mode delays DE = L and RE (Note 1) = H for greater than 600 ns prior to test (device is in sleep mode).
ID
.
IN2
Driver Differential Propagation Delay — Low to High
Driver Differential Propagation Delay — High to Low
Differential Skew |t
Driver Rise Time
Driver Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output Low
Driver Disable from Output High
Driver Enable from Sleep
Mode to Output High
Driver Enable from Sleep
Mode to Output Low
Receiver Differential Propagation Delay — Low to High
Receiver Differential Propagation Delay — High to Low
Differential Skew |t
Receiver Enable to Output High
Receiver Enable to Output Low
Receiver Disable from Output Low
Receiver Disable from Output High
Receiver Enable from Sleep
Mode to Output High
Receiver Enable from Sleep
Mode to Output Low
Time to Sleep (Device)
Maximum Data Rate
max
L
OD
includes the receiver input current and driver TRI-STATE leakage current.
includes jig and probe capacitance.
is the guaranteed data rate for 50 ft of twisted pair cable. f
| and ∆|V
max
r
and t
). Using a 10% ratio yields f
OC
| are changes in magnitude of V
f
≤ 6 ns, Z
PHLD
PHLD
CC
O
= +5.0V, T
Parameter
= 50Ω.
− t
− t
PLHD
PLHD
A
|
|
= +25˚C.
max
= (0.1)/50 ns = 2.0 Mb/s. Higher data rates may be supported by allowing larger ratios.
OD
and V
OC
max
respectively, that occur when the input changes state.
may be conservatively determined from the ratio of driver transition time (t
3
R
C
C
C
C
C
(Note 12) (Figures 5, 6)
C
(Note 12) (Figures 7, 8)
C
C
C
(Note 12) (Figures 11, 13)
C
(Note 12) (Figures 11, 12)
DE = L and RE (Note 1) = H
(Figure 14)
(Note 11)
L
L
L
L
L
L
L
L
L
L
L
= 54Ω, C
= 100 pF
= 100 pF
= 15 pF
= 15 pF
= 100 pF
= 100 pF
= 15 pF (RO)
= 15 pF
= 15 pF
= 15 pF
Conditions
L
= 100 pF
Min Typ Max
2.0
10
10
70
70
30
30
70
70
50
0
3
3
0
190
210
40
39
25
25
50
65
80
80
98
98
20
45
40
50
55
97
95
1
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200
200
200
200
250
250
400
400
150
150
150
150
250
250
600
80
80
10
50
50
50
r
) to the data
OD1/2/3
Units
Mbps
and
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns