Datasheet

MAX3291/MAX3292
RS-485/RS-422 Transceivers with Preemphasis
for High-Speed, Long-Distance Communication
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(Typical Operating Circuit, V
CC
= +5V ±5%, R
PSET
= 0 (MAX3292), V
CC
= V
CCD
(MAX3292), T
A
= T
MIN
to T
MAX
, unless otherwise
noted. Typical values are at V
CC
= +5V and T
A
= +25°C.) (Note 1)
SWITCHING CHARACTERISTICS
(Typical Operating Circuit, V
CC
= +5V ±5%, R
PSET
= 0 (MAX3292), V
CC
= V
CCD
(MAX3292), T
A
= +25°C, unless otherwise noted.
Typical values are at V
CC
= +5V and T
A
= +25°C.)
-7V ≤ V
CM
≤ +12V
RE = V
CC,
DE = GND, V
Y
= V
Z
= 0 to V
CC
or
floating
RE = GND, DE = V
CC
0 ≤ V
O
≤ V
CC
-7V ≤ V
CM
≤ +12V
0 ≤ V
RO
≤ V
CC
CONDITIONS
mV-200 200V
TH
Receiver Differential
Threshold Voltage
µA0.1 1I
SHDN
Supply Current in Shutdown
Mode
mA2.0 3.0I
CC +
I
CCD
No-Load Supply Current
µA0.1 ±1I
OZR
Three-State Output Current at
Receiver
kΩ48R
IN
Receiver Input Resistance
mA±15 ±95I
OSR
Receiver Output Short-Circuit
Current
UNITSMIN TYP MAXSYMBOLPARAMETER
V
A
= V
B
= 0 mV35∆V
TH
Receiver Input Hysteresis
I
O
= -4mA, V
A
- V
B
= V
TH
V3.5V
OH
Receiver Output High Voltage
I
O
= 4mA, V
A
- V
B
= -V
TH
V0.4V
OL
Receiver Output Low Voltage
DE = GND,
V
CC
= GND or 5.25V
µA
-150
I
A
,
B
250
Input Current (A and B)
V
IN
= +12V
V
IN
= -7V
Driver Differential Output
Rise or Fall Time
Figures 3 and 5, R
DIFF
= 54Ω,
C
L1
= C
L2
= 50pF
ns
44 65t
DPHL
Driver Propagation Delay
CONDITIONS
t
HL
12
Figures 3 and 5, R
DIFF
= 54Ω,
C
L1
= C
L2
= 50pF
ns
t
LH
Differential Driver Output
Skew  t
DPLH
- t
DPHL

Figures 3 and 10, R
DIFF
= 54Ω,
C
L1
= C
L2
= 50pF
ns30t
PTND
Preemphasis Voltage Level to
Normal Voltage Level Delay
t
DSKEW
Figures 3 and 5, R
DIFF
= 54Ω,
C
L1
= C
L2
= 50pF
38ns
Mbps10f
MAX
Maximum Data Rate
41 65t
DPLH
UNITSMIN TYP MAXSYMBOLPARAMETER
RECEIVER
SUPPLY CURRENT
Driver Preemphasis Interval t
PRE
80 100 120
Figures 3 and 10,
R
DIFF
= 54Ω,
C
L1
= C
L2
= 50pF
ns
0.75 1 1.25 µs
MAX3292,
R
PSET
= 523kΩ
MAX3291/MAX3292,
R
PSET
= 0