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參數(shù)資料
| 型號(hào)： | 8487EIB |
| 廠商： | Intersil Corporation |
| 元件分類： | RS-485 |
| 英文描述： | 【15kV ESD Protected, 1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers |
| 中文描述： | 【15kV的ESD保護(hù)，1 / 8單位負(fù)載，5V，低功耗，高速或擺率限制，RS-485/RS-422收發(fā)器 |
| 文件頁數(shù)： | 6/14頁 |
| 文件大小： | 527K |
| 代理商： | 8487EIB |
6
FN6051.6
Receiver Enable from Shutdown to
Output High
t
ZH(SHDN)
C
L
= 15pF, SW = GND, (Figure 5, Notes 7, 9)
Full
-
800
2500
ns
Receiver Enable from Shutdown to
Output Low
t
ZL(SHDN)
C
L
= 15pF, SW = V
CC
, (Figure 5, Notes 7, 9)
Full
-
800
2500
ns
SWITCHING CHARACTERISTICS (ISL81487L)
Driver Input to Output Delay
t
PLH
, t
PHL
t
SKEW
t
R
, t
F
R
DIFF
= 54
, C
L
= 100pF, (Figure 2)
R
DIFF
= 54
, C
L
= 100pF, (Figure 2)
R
DIFF
= 54
, C
L
= 100pF, (Figure 2)
Full
150
650
1200
ns
Driver Output Skew
Full
-
160
600
ns
Driver Differential Rise or Fall Time
Full
250
900
1200
ns
Driver Enable to Output High
t
ZH
C
L
= 100pF, SW = GND, (Figure 3, Note 5)
Full
100
1000
1500
ns
Driver Enable to Output Low
t
ZL
C
L
= 100pF, SW = V
CC
, (Figure 3, Note 5)
Full
100
1000
1500
ns
Driver Disable from Output High
t
HZ
t
LZ
C
L
= 15pF, SW = GND, (Figure 3)
C
L
= 15pF, SW = V
CC
, (Figure 3)
(Figure 4)
Full
150
750
1500
ns
Driver Disable from Output Low
Full
150
750
1500
ns
Receiver Input to Output Delay
t
PLH
, t
PHL
t
SKD
Full
30
175
250
ns
Receiver Skew | t
PLH
- t
PHL
|
(Figure 4)
25
-
13
-
ns
Receiver Enable to Output High
t
ZH
C
L
= 15pF, SW = GND, (Figure 5, Note 6)
Full
-
10
50
ns
Receiver Enable to Output Low
t
ZL
C
L
= 15pF, SW = V
CC
, (Figure 5, Note 6)
Full
-
10
50
ns
Receiver Disable from Output High
t
HZ
C
L
= 15pF, SW = GND, (Figure 5)
Full
-
10
50
ns
Receiver Disable from Output Low
t
LZ
f
MAX
t
SHDN
t
ZH(SHDN)
C
L
= 15pF, SW = V
CC
, (Figure 5)
Full
-
10
50
ns
Maximum Data Rate
Full
250
-
-
kbps
Time to Shutdown
(Note 7)
Full
50
140
600
ns
Driver Enable from Shutdown to
Output High
C
L
= 100pF, SW = GND, (Figure 3, Notes 7, 8)
Full
-
1100
2000
ns
Driver Enable from Shutdown to
Output Low
t
ZL(SHDN)
C
L
= 100pF, SW = V
CC
, (Figure 3, Notes 7, 8)
Full
-
1000
2000
ns
Receiver Enable from Shutdown to
Output High
t
ZH(SHDN)
C
L
= 15pF, SW = GND, (Figure 5, Notes 7, 9)
Full
-
900
2000
ns
Receiver Enable from Shutdown to
Output Low
t
ZL(SHDN)
C
L
= 15pF, SW = V
CC
, (Figure 5, Notes 7, 9)
Full
-
900
2000
ns
ESD PERFORMANCE
RS-485 Pins (A/Y, B/Z)
Human Body Model
25
-
±
15
-
kV
All Other Pins
25
-
>
±
7
-
kV
NOTES:
2. Currents into device pins are positive; currents out of device pins are negative. Voltages are referenced to 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. When testing the ISL8487E and ISL81487L, keep RE = 0 to prevent the device from entering SHDN.
6. When testing the ISL8487E and ISL81487L, the RE signal high time must be short enough (typically <200ns) to prevent the device from entering
SHDN.
7. The ISL8487E and ISL81487L are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns, the parts
are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See
“Low-Power Shutdown Mode” section.
8. Keep RE = V
CC
, and set the DE signal low time >600ns to ensure that the device enters SHDN.
9. Set the RE signal high time >600ns to ensure that the device enters SHDN.
10. Devices meeting these limits are denoted as “1/8 unit load (1/8 UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus,
so there can be 256 1/8 UL devices on a bus.
Electrical Specifications
Test Conditions: V
CC
= 4.5V to 5.5V; Unless Otherwise Specified.
Typicals are at V
CC
= 5V, T
A
= 25°C, (Note 2)
(Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
ISL8487E, ISL81487L, ISL81487E
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