Datasheet
0.8
V
IN
= 12V
MAX3480A/MAX3480B
Complete, Isolated, 3.3V
RS-485/RS-422 Data Interface
_______________________________________________________________________________________ 3
DI
´
= V
CC
CONDITIONS
1.0
ISO I
IN
V
CM
= 0V
V0.4V
OL
Receiver Output/Receiver Output
Low Voltage
mA
70∆V
TH
Input Current (A, B)
UNITSMIN TYP MAXSYMBOLPARAMETER
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= V
CC1
= V
CC2
= V
CC4
= V
CC5
= 3.0V to 3.6V, FS = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
V
CC
= V
CC1
= V
CC2
= V
CC4
= V
CC5
= 3.3V and T
A
= +25°C.) (Notes 1, 2, 3)
Receiver Input Hysteresis
V
OUT
= 3.6V, DI
´
= 0V
µA250I
OH
Receiver Output/Receiver Output
High Current
-7V ≤ V
O
≤ 12V (Note 4) mA100ISO I
OSD
Driver Short-Circuit Current
DE
´
= 0V,
V
CC
= 0V or 3.6V
mV
SWITCHING CHARACTERISTICS—MAX3480A
(V
CC
= V
CC1
= V
CC2
= V
CC4
=V
CC5
= 3.0V to 3.6V, FS = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
V
CC
= V
CC1
= V
CC2
= V
CC4
= V
CC5
= 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 (Note 5)
t
SKEW 25 90 ns
Driver Rise or Fall Time
t
R
, t
F 15 40 ns
Driver Enable to Output High
t
ZH 0.2 1.5 µs
Driver Enable to Output Low
t
ZL 0.2 1.5 µs
Driver Disable Time from High
t
HZ 0.3 1.5 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
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 0.3 1.5 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
Figures 4, 8; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF
Maximum Data Rate
f
MAX 2.5 Mbps
t
PLH,
t
PHL < 50% of data period
t
PHL
t
PHL 100 275
100 225
-7V ≤ V
CM
≤ 12V
0.25
R
IN
kΩReceiver Input Resistance
-7V ≤ V
CM
≤ 12V -0.2 0.2V
TH
VReceiver Differential Threshold
MAX3480B 48
12
-0.2
-0.8
V
IN
= 12V
V
IN
= -7V
V
IN
= 12V
V
IN
= -7V
MAX3480B
MAX3480A
MAX3480A