Datasheet

MAX3480EA/MAX3480EB
±15kV ESD-Protected, Isolated, 3.3V
RS-485/RS-422 Data Interfaces
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= V
CC1
= V
CC2
= V
CC4
= V
CC5
= +3.0V to +3.6V, FS = 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
=
+3.3V and T
A
= +25°C.) (Notes 1, 2)
SWITCHING CHARACTERISTICS—MAX3480EA
(V
CC
= V
CC1
= V
CC2
= V
CC4
=V
CC5
= +3.0V to +3.6V, FS = 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
V
CC
= +3.3V and T
A
= +25°C.)
ns
PARAMETER SYMBOL MIN TYP MAX UNITS

t
PLH
-
t
PHL
Differential
Receiver Skew
Driver Input to Output
Propagation Delay
t
PLH 100 275
ns
Driver Output Skew
t
SKEW 25 100 ns
Driver Rise or Fall Time
t
R
, t
F 15 50 ns
Driver Enable to Output High
t
ZH 0.5 1.8 µs
Driver Enable to Output Low
t
ZL 0.5 1.8 µs
Driver Disable Time from High
t
HZ 0.6 1.8 µs
CONDITIONS
Figures 4, 6; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 5, 7; C
L
= 100pF, S2 closed
Figures 5, 7; C
L
= 100pF, S1 closed
Figures 4, 6; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF (Note 5)
Figures 4, 6; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Figures 5, 7; C
L
= 15pF, S2 closed
Driver Disable Time from Low
t
LZ 0.6 1.8 µsFigures 5, 7; C
L
= 15pF, S1 closed
t
SKD
100 225
Receiver Input to Output
Propagation Delay
t
PLH
ns
Figures 4, 8; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
20 100
Figures 4, 8; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Maximum Data Rate
f
MAX 2.5 Mbps
t
SKEW,
t
SKD ≤ 25% of data period
t
PHL
t
PHL 100 275
120 225
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Driver Common-Mode Output V
OC
R = 27Ω or 50Ω, Figure 4 4 V
V
IN
= +12V 0.25
MAX3480EA
V
IN
= -7V -0.2
V
IN
= +12V 0.25
Input Current (A, B) ISO I
IN
DE´ = 0,
V
CC
= 0 or
+3.6V
MAX3480EB
V
IN
= -7V -0.2
mA
Receiver Input Resistance R
IN
-7V ≤ V
CM
≤ 12V 48 kΩ
Receiver Differential Threshold V
TH
-7V ≤ V
CM
≤ 12V -0.2 +0.2 V
Receiver Input Hysteresis ∆V
TH
V
CM
= 0 70 mV
Receiver Output Low Voltage V
OL
DI´ = V
CC
0.4 V
Receiver Output High Current I
OH
V
OUT
= +3.6V, DI´ = 0 250 µA
Driver Short-Circuit Current ISO I
OSD
-7V ≤ V
O
≤ 12V (Note 5) 100 mA