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ISL8487E Datasheet(PDF) 6 Page - Intersil Corporation

Part No. ISL8487E
Description  짹15kV ESD Protected, 1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL8487E Datasheet(HTML) 6 Page - Intersil Corporation

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6
FN6051.6
Receiver Enable from Shutdown to
Output High
tZH(SHDN) CL = 15pF, SW = GND, (Figure 5, Notes 7, 9)
Full
-
800
2500
ns
Receiver Enable from Shutdown to
Output Low
tZL(SHDN) CL = 15pF, SW = VCC, (Figure 5, Notes 7, 9)
Full
-
800
2500
ns
SWITCHING CHARACTERISTICS (ISL81487L)
Driver Input to Output Delay
tPLH, tPHL RDIFF = 54Ω, CL = 100pF, (Figure 2)
Full
150
650
1200
ns
Driver Output Skew
tSKEW
RDIFF = 54Ω, CL = 100pF, (Figure 2)
Full
-
160
600
ns
Driver Differential Rise or Fall Time
tR, tF
RDIFF = 54Ω, CL = 100pF, (Figure 2)
Full
250
900
1200
ns
Driver Enable to Output High
tZH
CL = 100pF, SW = GND, (Figure 3, Note 5)
Full
100
1000
1500
ns
Driver Enable to Output Low
tZL
CL = 100pF, SW = VCC, (Figure 3, Note 5)
Full
100
1000
1500
ns
Driver Disable from Output High
tHZ
CL = 15pF, SW = GND, (Figure 3)
Full
150
750
1500
ns
Driver Disable from Output Low
tLZ
CL = 15pF, SW = VCC, (Figure 3)
Full
150
750
1500
ns
Receiver Input to Output Delay
tPLH, tPHL (Figure 4)
Full
30
175
250
ns
Receiver Skew | tPLH - tPHL |tSKD
(Figure 4)
25
-
13
-
ns
Receiver Enable to Output High
tZH
CL = 15pF, SW = GND, (Figure 5, Note 6)
Full
-
10
50
ns
Receiver Enable to Output Low
tZL
CL = 15pF, SW = VCC, (Figure 5, Note 6)
Full
-
10
50
ns
Receiver Disable from Output High
tHZ
CL = 15pF, SW = GND, (Figure 5)
Full
-
10
50
ns
Receiver Disable from Output Low
tLZ
CL = 15pF, SW = VCC, (Figure 5)
Full
-
10
50
ns
Maximum Data Rate
fMAX
Full
250
-
-
kbps
Time to Shutdown
tSHDN
(Note 7)
Full
50
140
600
ns
Driver Enable from Shutdown to
Output High
tZH(SHDN) CL = 100pF, SW = GND, (Figure 3, Notes 7, 8)
Full
-
1100
2000
ns
Driver Enable from Shutdown to
Output Low
tZL(SHDN) CL = 100pF, SW = VCC, (Figure 3, Notes 7, 8)
Full
-
1000
2000
ns
Receiver Enable from Shutdown to
Output High
tZH(SHDN) CL = 15pF, SW = GND, (Figure 5, Notes 7, 9)
Full
-
900
2000
ns
Receiver Enable from Shutdown to
Output Low
tZL(SHDN) CL = 15pF, SW = VCC, (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 = VCC, 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: VCC = 4.5V to 5.5V; Unless Otherwise Specified.
Typicals are at VCC = 5V, TA = 25°C, (Note 2) (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
ISL8487E, ISL81487L, ISL81487E


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