EVALUATION KIT AVAILABLE
MAX3080MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
General Description Next Generation Device Features
The MAX3080MAX3089 high-speed transceivers for
For Fault-Tolerant Applications:
RS-485/RS-422 communication contain one driver and
MAX3430: 80V Fault-Protected, Fail-Safe, 1/4-
one receiver. These devices feature fail-safe circuitry,
Unit Load, +3.3V RS-485 Transceiver
which guarantees a logic-high receiver output when the
For Low-Voltage Applications:
receiver inputs are open or shorted. This means that
the receiver output will be a logic high if all transmitters
MAX3362: +3.3V, High-Speed, RS-485/RS-422
on a terminated bus are disabled (high impedance).
Transceiver in a SOT23 Package
The MAX3080/MAX3081/MAX3082 feature reduced
For Multiple Transceiver Applications:
slew-rate drivers that minimize EMI and reduce reflec-
MAX3030EMAX3033E: 15kV ESD-Protected,
tions caused by improperly terminated cables, allowing
error-free data transmission up to 115kbps. The +3.3V, Quad, RS-422 Transmitters
MAX3083/MAX3084/MAX3085 offer higher driver out-
MAX3040MAX3045: 10kV ESD-Protected, Quad,
put slew-rate limits, allowing transmit speeds up to
+5V, RS-485/RS-422 Transmitters
500kbps. The MAX3086/MAX3087/MAX3088s driver
slew rates are not limited, making transmit speeds up Applications
to 10Mbps possible. The MAX3089s slew rate is
RS-422/RS-485 Communications
selectable between 115kbps, 500kbps, and 10Mbps
by driving a selector pin with a single three-state driver.
Level Translators
These transceivers typically draw 375A of supply Transceivers for EMI-Sensitive Applications
current when unloaded, or when fully loaded with the
Industrial-Control Local Area Networks
drivers disabled.
All devices have a 1/8-unit-load receiver input imped-
Ordering Information
ance that allows up to 256 transceivers on the bus. The
PART TEMP RANGE PIN-PACKAGE
MAX3082/MAX3085/MAX3088 are intended for half-
duplex communications, while the MAX3080/MAX3081/ MAX3080CSD 0C to +70C 14 SO
MAX3083/MAX3084/MAX3086/MAX3087 are intended
MAX3080CPD 0C to +70C 14 Plastic DIP
for full-duplex communications. The MAX3089 is selec-
MAX3080ESD -40C to +85C 14 SO
table between half-duplex and full-duplex operation. It
MAX3080EPD -40C to +85C 14 Plastic DIP
also features independently programmable receiver
and transmitter output phase via separate pins.
Ordering Information continued at end of data sheet.
Functional Diagrams
Selection Table
Data Slew Low- Receiver/ Quiescent Transceivers Industry-
Half/Full Pin
Part Rate Rate Power Driver Current On Standard
Duplex Count
(Mbps) Limited Shutdown Enable (A) Bus Pinout
MAX3080 Full 0.115 Yes Yes Yes 375 256 14 75180
MAX3081 Full 0.115 Yes No No 375 256 8 75179
MAX3082 Half 0.115 Yes Yes Yes 375 256 8 75176
MAX3083 Full 0.5 Yes Yes Yes 375 256 14 75180
MAX3084 Full 0.5 Yes No No 375 256 8 75179
MAX3085 Half 0.5 Yes Yes Yes 375 256 8 75176
MAX3086 Full 10 No Yes Yes 375 256 14 75180
MAX3087 Full 10 No No No 375 256 8 75179
MAX3088 Half 10 No Yes Yes 375 256 8 75176
MAX3089 Selectable Selectable Selectable Yes Yes 375 256 14 75180*
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
*Pin-compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
19-1138; Rev 3; 12/05
at 1-888-629-4642, or visit Maxims website at www.maxim integrated.com.
AVAILABLEMAX3080MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V ) ............................................................+7V Continuous Power Dissipation
CC
Control Input Voltage (RE, DE)...................-0.3V to (V + 0.3V) 8-Pin Plastic DIP (derate 9.09mW/C above +70C) ...727mW
CC
Special Input Voltage 8-Pin SO (derate 5.88mW/C above +70C)................471mW
(H/F, SRL, TXP, RXP)..................................-0.3V to (V + 0.3V) 14-Pin Plastic DIP (derate 10.0mW/C above +70C) ....800mW
CC
Driver Input Voltage (DI).............................-0.3V to (V + 0.3V) 14-Pin SO (derate 8.33mW/C above +70C)..............667mW
CC
Driver Output Voltage (A, B, Y, Z)........................................13V Operating Temperature Ranges
Receiver Input Voltage (A, B) ..............................................13V MAX308_C_ _ .....................................................0C to +70C
Receiver Input Voltage, Full Duplex (A, B) ..........................25V MAX308_E_ _...................................................-40C to +85C
Receiver Output Voltage (RO)....................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C
CC
Lead Temperature (soldering, 10s) .................................+300C
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.
DC ELECTRICAL CHARACTERISTICS
(V = +5V 5%, T = T to T , unless otherwise noted. Typical values are at V = +5V and T = +25C.) (Note 1)
CC A MIN MAX CC A
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DRIVER
Differential Driver Output
V Figure 5 5 V
OD1
(no load)
Figure 5, R = 50 (RS-422) 2.0
Differential Driver Output V V
OD2
Figure 5, R = 27 (RS-485) 1.5
Change in Magnitude of
Differential Output Voltage V Figure 5, R = 50 or R = 27 0.2 V
OD
(Note 2)
Driver Common-Mode Output
V Figure 5, R = 50 or R = 27 3 V
OC
Voltage
Change In Magnitude of
V Figure 5, R = 50 or R = 27 0.2 V
OC
Common-Mode Voltage (Note 2)
Input High Voltage V 2.0 V
DE, DI, RE, H/F, TXP, RXP
IH1
Input Low Voltage V 0.8 V
DE, DI, RE, H/F, TXP, RXP
IL1
MAX3080MAX3085, and MAX3089 with
DI Input Hysteresis V 100 mV
HYS
SRL = V or unconnected
CC
I DE, DI, RE 2
IN1
SRL Input Current A
I H/F, TXP, RXP, internal pulldown 10 40
IN2
Input High Voltage V SRL V - 0.8 V
IH2 CC
Input Middle Voltage V SRL (Note 3) 0.4V 0.6V V
IM2 CC CC
Input Low Voltage V SRL 0.8 V
IL2
SRL = V 75
CC
SRL Input Current I A
IN3
SRL = GND (Note 3) -75
V = 12V 125
IN
Input Current (A and B) DE = GND,
I A
IN4
Full Duplex V = GND or 5.25V
CC
V = -7V -75
IN
V = 12V 125
IN
Output Leakage (Y and Z) DE = GND,
I A
O
Full Duplex V = GND or 5.25V
CC
V = -7V -100
IN
-7V V V -250
OUT CC
Driver Short-Circuit Output
V 0V V 12V 250 mA
OD1 OUT
Current (Note 4)
0V V V 25
OUT CC
2 Maxim Integrated