5
FN6073.4
July 26, 2007
Receiver Short-Circuit Current I
OSR
0V ≤ V
O
≤ V
CC
Full 7 - 85 mA
SWITCHING CHARACTERISTICS (ISL8488E, ISL8489E)
Driver Input to Output Delay t
PLH
, t
PHL
R
DIFF
= 54Ω, C
L
= 100pF (Figure 2) Full 250 400 2000 ns
Driver Output Skew t
SKEW
R
DIFF
= 54Ω, C
L
= 100pF (Figure 2) Full - 160 800 ns
Driver Differential Rise or Fall Time t
R
, t
F
R
DIFF
= 54Ω, C
L
= 100pF (Figure 2) Full 250 600 2000 ns
Driver Enable to Output High t
ZH
C
L
= 100pF, SW = GND (Figure 3, Note 8) Full 250 1000 2000 ns
Driver Enable to Output Low t
ZL
C
L
= 100pF, SW = V
CC
(Figure 3, Note 8) Full 250 860 2000 ns
Driver Disable from Output High t
HZ
C
L
= 15pF, SW = GND (Figure 3, Note 8) Full 300 660 3000 ns
Driver Disable from Output Low t
LZ
C
L
= 15pF, SW = V
CC
(Figure 3, Note 8) Full 300 640 3000 ns
Receiver Input to Output Delay t
PLH
, t
PHL
(Figure 4) Full 250 500 2000 ns
Receiver Skew | t
PLH
- t
PHL
|t
SKD
(Figure 4) 25 - 60 - ns
Receiver Enable to Output High t
ZH
C
L
= 15pF, SW = GND (Figure 5, Note 8) Full - 10 50 ns
Receiver Enable to Output Low t
ZL
C
L
= 15pF, SW = V
CC
(Figure 5, Note 8) Full - 10 50 ns
Receiver Disable from Output High t
HZ
C
L
= 15pF, SW = GND (Figure 5, Note 8) Full - 10 50 ns
Receiver Disable from Output Low t
LZ
C
L
= 15pF, SW = V
CC
(Figure 5, Note 8) Full - 10 50 ns
Maximum Data Rate f
MAX
Full 250 - - kbps
SWITCHING CHARACTERISTICS (ISL8490E, ISL8491E)
Driver Input to Output Delay t
PLH
, t
PHL
R
DIFF
= 54Ω, C
L
= 100pF (Figure 2) Full 13 24 50 ns
Driver Output Skew t
SKEW
R
DIFF
= 54Ω, C
L
= 100pF (Figure 2) Full - 3 10 ns
Driver Differential Rise or Fall Time t
R
, t
F
R
DIFF
= 54Ω, C
L
= 100pF (Figure 2) Full 5 12 25 ns
Driver Enable to Output High t
ZH
C
L
= 100pF, SW = GND (Figure 3, Note 8) Full - 14 70 ns
Driver Enable to Output Low t
ZL
C
L
= 100pF, SW = V
CC
(Figure 3, Note 8) Full - 14 70 ns
Driver Disable from Output High t
HZ
C
L
= 15pF, SW = GND (Figure 3, Note 8) Full - 44 70 ns
Driver Disable from Output Low t
LZ
C
L
= 15pF, SW = V
CC
(Figure 3, Note 8) Full - 21 70 ns
Receiver Input to Output Delay t
PLH
, t
PHL
(Figure 4) Full 30 90 150 ns
Receiver Skew | t
PLH
- t
PHL
|t
SKD
(Figure 4) 25 - 5 - ns
Receiver Enable to Output High t
ZH
C
L
= 15pF, SW = GND (Figure 5, Note 8) Full - 9 50 ns
Receiver Enable to Output Low t
ZL
C
L
= 15pF, SW = V
CC
(Figure 5, Note 8) Full - 9 50 ns
Receiver Disable from Output High t
HZ
C
L
= 15pF, SW = GND (Figure 5, Note 8) Full - 9 50 ns
Receiver Disable from Output Low t
LZ
C
L
= 15pF, SW = V
CC
(Figure 5, Note 8) Full - 9 50 ns
Maximum Data Rate f
MAX
Full 10 - - Mbps
ESD PERFORMANCE
RS-485 Pins (A, B, Y, Z) Human Body Model 25 - ±15 - kV
All Other Pins 25 - >±7-kV
NOTES:
4. 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.
5. Supply current specification is valid for loaded drivers when DE = 0V.
6. Applies to peak current. See “Typical Performance Curves” on page 9 for more information.
7. Devices meeting these limits are denoted as “single unit load (1 UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus.
8. Not applicable to the ISL8488E, ISL8490E.
9. Parts are 100% tested at +25°C. Over-temperature limits established by characterization and are not production tested.
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 4). (Continued)
PARAMETER SYMBOL TEST CONDITIONS
TEMP
(°C)
MIN
(NOTE 9) TYP
MAX
(NOTE 9) UNITS
ISL8488E, ISL8489E, ISL8490E, ISL8491E
