ISL33354E, ISL33357E
Electrical Specifications Test Conditions: V = 4.5V to 5.5V, C - C = 0.1µF, unless otherwise specified. Typicals are at V = 5V,
CC
1
4
CC
T
= +25°C (Note 10). (Continued) Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
A
TEMP
(°C) (Note 15)
MIN
MAX
(Note 15) UNIT
PARAMETER
SYMBOL
TEST CONDITIONS
TYP
260
Receiver Enable from Shutdown to
Output Low
t
C
C
= 15pF, SW = V (Figure 6)
CC
Full
Full
-
-
700
ns
ZLSHDN
L
L
Receiver Enable from Shutdown to
Output High
t
= 15pF, SW = GND (Figure 6)
260
700
ns
ZHSHDN
NOTES:
10. 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.
11. Supply current specification is valid for loaded RS-485 (port 2) drivers when DE485 = 0V.
12. Applies to peak current. See “Typical Performance Curves” on page 12 for more information.
13. A, B, RxIN defaults to RS-485 mode (>15kΩ) when the device is unpowered (V = 0V), or in SHDN.
CC
14. V ≤ 5.25V.
CC
15. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
Test Circuits and Waveforms
R
DE485
V
CC
Z
Y
DI
R
V
OD
D
D
V
R
OC
FIGURE 2. RS-485 DRIVER V AND V TEST CIRCUIT
OD OC
3V
0V
DI
50%
50%
PHL
t
t
PLH
V
OH
50%
50%
50%
50%
OUT (Y)
OUT (Z)
V
OL
t
t
PHL
PLH
V
OH
C
= 100pF
= 100pF
L
DE485
DI
V
OL
V
CC
t
t
DLH
DHL
Z
Y
R
+V
DIFF
D
OD
90%
10%
90%
10%
DIFF OUT (Y - Z)
0V
0V
C
L
-V
OD
SIGNAL
GENERATOR
t
t
F
R
SKEW = |t
PLH
(Y or Z) - t
PHL
(Z or Y)|
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3A. TEST CIRCUIT
FIGURE 3. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
FN8775.1
October 21, 2016
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