Datasheet

MAX3440E–MAX3444E
±15kV ESD-Protected, ±60V Fault-Protected,
10Mbps, Fail-Safe RS-485/J1708 Transceivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltages Referenced to GND
V
CC
........................................................................................+7V
FAULT, DE/RE, RE, DE, DE, DI, TXD..........-0.3V to (V
CC
+ 0.3V)
A, B (Note 1) ........................................................................±60V
RO ..............................................................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration (RO, A, B) ...............................Continuous
Continuous Power Dissipation (T
A
= +70°C)
SO (derate 5.9mW/°C above +70°C)...........................471mW
PDIP (derate 9.09mW/°C above +70°C)......................727mW
Operating Temperature Ranges
MAX344_EE_ _ ...............................................-40°C to +85°C
MAX344_EA_ _ .............................................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +4.75V to +5.25V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DRIVER
Figure 1, R
L
= 100 2 V
CC
Differential Driver Output V
OD
Figure 1, R
L
= 54 1.5 V
CC
V
Change in Magnitude of
Differential Output Voltage
V
OD
Figure 1, R
L
= 100 or 54 (Note 2) 0.2 V
Driver Common-Mode
Output Voltage
V
OC
Figure 1, R
L
= 100 or 54 V
CC
/ 2 3 V
Change in Magnitude of
Common-Mode Voltage
V
OC
Figure 1, R
L
= 100 or 54 (Note 2) 0.2 V
DRIVER LOGIC
Driver Input High Voltage V
DIH
2 V
Driver Input Low Voltage V
DIL
0.8 V
Driver Input Current I
DIN
±2 μA
0V  V
OUT
 +12V +350
Driver Short-Circuit Output Current
(Note 3)
I
OSD
-7V  V
OUT
 V
CC
-350
mA
(V
CC
- 1V)  V
OUT
 +12V (Note 3) +25
Driver Short-Circuit Foldback
Output Current
I
OSDF
-7V  V
OUT
 +1V (Note 3) -25
mA
RECEIVER
V
CC
= GND, V
A, B
= 12V 250
V
A, B
= -7V -150
μA
Input Current I
A,B
A, B
V
A, B
= ±60V ±6 mA
Receiver Differential Threshold
Voltage
V
TH
-7V  V
CM
 +12V -200 -50 mV
Receiver Input Hysteresis V
TH
25 mV
Note 1: A, B must be terminated with 54Ω or 100Ω to guarantee ±60V fault protection.