ISL81487L Intersil Corporation, ISL81487L Datasheet - Page 6

• Manufacturer Part Number: ISL81487L
• Description: 15kV ESD Protected/ 1/8 Unit Load/ 5V/ Low Power/ High Speed or Slew Rate Limited/ RS-485/RS-422 Transceivers
• Manufacturer: Intersil Corporation

Electrical Specifications
NOTES:
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,
Receiver Enable from Shutdown to
Output High
Receiver Enable from Shutdown to
Output Low
SWITCHING CHARACTERISTICS (ISL81487L)
Driver Input to Output Delay
Driver Output Skew
Driver Differential Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output High
Driver Disable from Output Low
Receiver Input to Output Delay
Receiver Skew | t
Receiver Enable to Output High
Receiver Enable to Output Low
Receiver Disable from Output High
Receiver Disable from Output Low
Maximum Data Rate
Time to Shutdown
Driver Enable from Shutdown to
Output High
Driver Enable from Shutdown to
Output Low
Receiver Enable from Shutdown to
Output High
Receiver Enable from Shutdown to
Output Low
ESD PERFORMANCE
RS-485 Pins (A/Y, B/Z)
All Other Pins
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
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
8. Keep RE = V
9. Set the RE signal high time >600ns to ensure that the device enters SHDN.
SHDN.
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.
so there can be 256 1/8 UL devices on a bus.
PARAMETER
CC
PLH
, and set the DE signal low time >600ns to ensure that the device enters SHDN.
- t
PHL
|
6
Test Conditions: V
Typicals are at V
t
t
t
t
t
t
t
t
SYMBOL
ZH(SHDN)
PLH
PLH
ZH(SHDN)
ZH(SHDN)
ZL(SHDN)
ZL(SHDN)
ZL(SHDN)
t
t
SKEW
t
SHDN
t
f
R
MAX
SKD
t
t
t
t
t
t
t
t
ZH
HZ
ZH
HZ
ZL
LZ
ZL
LZ
, t
, t
, t
PHL
PHL
F
ISL8487E, ISL81487L, ISL81487E
C
C
R
R
R
C
C
C
C
(Figure 4)
(Figure 4)
C
C
C
C
(Note 7)
C
C
C
C
Human Body Model
CC
L
L
DIFF
DIFF
DIFF
L
L
L
L
L
L
L
L
L
L
L
L
CC
= 15pF, SW = GND, (Figure 5, Notes 7, 9)
= 15pF, SW = V
= 100pF, SW = GND, (Figure 3, Note 5)
= 100pF, SW = V
= 15pF, SW = GND, (Figure 3)
= 15pF, SW = V
= 15pF, SW = GND, (Figure 5, Note 6)
= 15pF, SW = V
= 15pF, SW = GND, (Figure 5)
= 15pF, SW = V
= 100pF, SW = GND, (Figure 3, Notes 7, 8)
= 100pF, SW = V
= 15pF, SW = GND, (Figure 5, Notes 7, 9)
= 15pF, SW = V
= 5V, T
= 4.5V to 5.5V; Unless Otherwise Specified.
= 54Ω, C
= 54Ω, C
= 54Ω, C
A
TEST CONDITIONS
= 25
L
L
L
= 100pF, (Figure 2)
= 100pF, (Figure 2)
= 100pF, (Figure 2)
o
CC
CC
CC
CC
CC
C, (Note 2) (Continued)
CC
CC
, (Figure 5, Notes 7, 9)
, (Figure 3)
, (Figure 5, Note 6)
, (Figure 5)
, (Figure 5, Notes 7, 9)
, (Figure 3, Note 5)
, (Figure 3, Notes 7, 8)
TEMP
(
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
o
25
25
25
C)
MIN
150
250
100
100
150
150
250
30
50
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1000
1000
1100
1000
TYP
800
800
650
160
900
750
750
175
140
900
900
±15
>±7
13
10
10
10
10
-
MAX
2500
2500
1200
1200
1500
1500
1500
1500
2000
2000
2000
2000
600
250
600
50
50
50
50
-
-
-
-
UNITS
kbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
kV
kV
ns
ns
ns
ns
ns
ns
ns
ns