4
SWITCHING CHARACTERISTICS
Driver Input to Output Delay
tPLH, tPHL RDIFF = 54, CL = 100pF, (Figure 2)
Full
15
30
50
ns
Driver Output Skew
tSKEW
RDIFF = 54, CL = 100pF, (Figure 2)
Full
-
1.3
5
ns
Driver Differential Rise or Fall Time
tR, tF
RDIFF = 54, CL = 100pF, (Figure 2)
Full
3
11
25
ns
Driver Enable to Output High
tZH
CL = 100pF, SW = GND, (Figure 3)
Full
-
17
30
ns
Driver Enable to Output Low
tZL
CL = 100pF, SW = VCC, (Figure 3)
Full
-
14
30
ns
Driver Disable from Output High
tHZ
CL = 15pF, SW = GND, (Figure 3)
Full
-
19
30
ns
Driver Disable from Output Low
tLZ
CL = 15pF, SW = VCC, (Figure 3)
Full
-
13
30
ns
Driver Maximum Data Rate
fMAXD
VOD ≥ 1.5V , (Figure 4, Note 6)
Full
20
-
Mbps
Receiver Input to Output Delay
tPLH, tPHL Figure 5
Full
20
40
70
ns
Receiver Skew | tPLH - tPHL |tSKD
Figure 5
Full
-
3
10
ns
Receiver Enable to Output High
tZH
CL = 15pF, SW = GND, (Figure 6)
Full
-
9
25
ns
Receiver Enable to Output Low
tZL
CL = 15pF, SW = VCC, (Figure 6)
Full
-
9
25
ns
Receiver Disable from Output High
tHZ
CL = 15pF, SW = GND, (Figure 6)
Full
-
9
25
ns
Receiver Disable from Output Low
tLZ
CL = 15pF, SW = VCC, (Figure 6)
Full
-
9
25
ns
Receiver Maximum Data Rate
fMAXR
CL = 15pF, VID ≥ 1.5V (Note 6)
Full
20
-
Mbps
ESD PERFORMANCE
RS-485 Pins (A/Y, B/Z)
Human Body Model
25
-
±15
-
kV
All Other Pins
25
-
>
±7-
kV
NOTE:
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 “single unit load (1 UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus.
6. Guaranteed by characterization, but not tested.
Test Circuits and Waveforms
FIGURE 1. DRIVER VOD AND VOC
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified.
Typicals are at VCC = 5V, TA = 25
oC, Note 2 (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(oC)
MIN
TYP
MAX
UNITS
D
DE
DI
VCC
VOD
VOC
R
Z
Y
ISL4485E