參數(shù)資料
型號(hào)： ISL81485IU-T
廠商： INTERSIL CORP
元件分類： 通用總線功能
英文描述： 5V, 30Mbps, RS-485/RS-422 Transceiver
中文描述： LINE TRANSCEIVER, PDSO8
封裝： PLASTIC, MO-187AA, MSOP-8
文件頁(yè)數(shù)： 4/11頁(yè)
文件大?。?/td> 371K
代理商： ISL81485IU-T
4
Receiver Short-Circuit Current
I
OSR
0V
≤
V
O
≤
V
CC
Full
7
-
85
mA
SWITCHING CHARACTERISTICS
Driver Input to Output Prop Delay
t
PLH
, t
PHL
t
SKEW
t
R
, t
F
t
ZH
t
ZL
t
EN
R
DIFF
= 54
, C
L
= 100pF (Figure 2)
R
DIFF
= 54
, C
L
= 100pF (Figure 2)
R
DIFF
= 54
, C
L
= 100pF (Figure 2)
C
L
= 50pF, SW = GND (Figure 3)
C
L
= 50pF, SW = V
CC
(Figure 3)
(Figure 3)
Full
2
9
15
ns
Driver Prop Delay Skew
Full
-
1
5
ns
Driver Differential Rise or Fall Time
Full
-
5
15
ns
Driver Enable to Output High
Full
-
9
25
ns
Driver Enable to Output Low
Full
-
9
25
ns
Matched Enable Switching
|t
AZH
- t
BZL
| or |t
BZH
- t
AZL
|
Driver Disable from Output High
Full
-
1
3
ns
t
HZ
t
LZ
t
DIS
C
L
= 50pF, SW = GND (Figure 3)
C
L
= 50pF, SW = V
CC
(Figure 3)
(Figure 3)
Full
-
9
25
ns
Driver Disable from Output Low
Full
-
9
25
ns
Matched Disable Switching
|t
AHZ
- t
BLZ
| or |t
BHZ
- t
ALZ
|
Driver Maximum Data Rate
Full
-
2
5
ns
f
MAXD
t
PLH
, t
PHL
|
V
OD
|
≥
1.5V (Figure 4)
(Figure 5)
Full
30
-
-
Mbps
Receiver Input to Output Prop
Delay
Full
8
17
30
ns
Receiver Prop Delay Skew
| t
PLH
- t
PHL
|
Receiver Enable to Output High
t
SKD
(Figure 5)
Full
-
1
5
ns
t
ZH
t
ZL
t
HZ
t
LZ
f
MAXR
C
L
= 15pF, SW = GND (Figure 6)
C
L
= 15pF, SW = V
CC
(Figure 6)
C
L
= 15pF, SW = GND (Figure 6)
C
L
= 15pF, SW = V
CC
(Figure 6)
C
L
= 15pF, V
ID
≥
1.5V, RO t
H
and t
L
≥
20ns
Full
-
7
20
ns
Receiver Enable to Output Low
Full
-
7
20
ns
Receiver Disable from Output High
Full
-
7
20
ns
Receiver Disable from Output Low
Full
-
7
20
ns
Receiver Maximum Data Rate
Full
30
-
-
Mbps
NOTES:
2. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless
otherwise specified.
3. Supply current specification is valid for loaded drivers when DE = 0V.
4. Applies to peak current. See “Typical Performance Curves” for more information.
5. Devices meeting these limits are denoted as “1 unit load (UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus, so a
1UL transceiver permits > 32 devices on the bus.
Test Circuits and Waveforms
FIGURE 1A. V
OD
AND V
OC
FIGURE 1B. V
OD
WITH COMMON MODE LOAD
FIGURE 1. DC DRIVER TEST CIRCUITS
Electrical Specifications
Test Conditions: V
CC
= 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at V
CC
= 5V, T
A
= 25
o
C,
Note 2
(Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(
o
C)
MIN
TYP
MAX
UNITS
D
DE
DI
V
CC
V
OD
V
OC
R
R
Z
Y
D
DE
DI
V
CC
V
OD
375
375
Z
Y
R
D
= 60
V
CM
-7V to +12V
ISL81485
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