MAX3080EMAX3089E
19-1800; Rev 1; 5/06
15kV ESD-Protected,Fail-Safe,High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
General Description Features
The MAX3080EMAX3089E are 15kV electrostatic dis-
ESD Protection for RS-485 I/O Pins
charge (ESD)-protected, high-speed transceivers for RS-
15kV, Human Body Model
485/RS-422 communication that contain one driver and
True Fail-Safe Receiver While Maintaining
one receiver. These devices feature fail-safe circuitry,
EIA/TIA-485 Compatibility
which guarantees a logic-high receiver output when the
receiver inputs are open or shorted. This means that the
Enhanced Slew-Rate Limiting Facilitates
receiver output will be a logic high if all transmitters on a
Error-Free Data Transmission
terminated bus are disabled (high impedance). The
(MAX3080EMAX3085E/MAX3089E)
MAX3080E/MAX3081E/MAX3082E feature reduced
1nA Low-Current Shutdown Mode (Except
slew-rate drivers that minimize EMI and reduce reflec-
MAX3081E/MAX3084E/MAX3087E)
tions caused by improperly terminated cables, allowing
error-free data transmission up to 115kbps. The
Pin-Selectable Full/Half-Duplex Operation
MAX3083E/MAX3084E/MAX3085E offer higher driver
(MAX3089E)
output slew-rate limits, allowing transmit speeds up to
Phase Controls to Correct for Twisted-Pair
500kbps. The MAX3086E/MAX3087E/ MAX3088Es dri-
Reversal (MAX3089E)
ver slew rates are not limited, making transmit speeds
up to 10Mbps possible. The MAX3089Es slew rate is
Allow Up to 256 Transceivers on the Bus
selectable between 115kbps, 500kbps, and 10Mbps by
Applications
driving a selector pin with a single three-state driver. All
devices feature enhanced ESD protection. All transmitter
RS-422/RS-485 Communications
outputs and receiver inputs are protected to 15kV
using the Human Body Model. Level Translators
These transceivers typically draw 375A of supply Transceivers for EMI-Sensitive Applications
current when unloaded, or when fully loaded with the dri-
Industrial-Control Local Area Networks
vers disabled.
All devices have a 1/8-unit-load receiver input impedance
Ordering Information
that allows up to 256 transceivers on the bus. The
MAX3082E/MAX3085E/MAX3088E are intended for half- PART TEMP. RANGE PIN-PACKAGE
duplex communications, while the MAX3080E/MAX3081E/
MAX3080ECSD 0C to +70C 14 SO
MAX3083E/MAX3084E/MAX3086E/MAX3087E are
MAX3080ECPD 0C to +70C 14 Plastic DIP
intended for full-duplex communications. The MAX3089E
MAX3080EESD -40C to +85C 14 SO
is selectable between half-duplex and full-duplex opera-
MAX3080EEPD -40C to +85C 14 Plastic DIP
tion. It also features independently programmable
receiver and transmitter output phase via separate pins.
Ordering Information continued at end of data sheet.
Selector Guide
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
MAX3080E Full 0.115 Yes Yes Yes 375 256 14 75180
MAX3081E Full 0.115 Yes No No 375 256 8 75179
MAX3082E Half 0.115 Yes Yes Yes 375 256 8 75176
MAX3083E Full 0.5 Yes Yes Yes 375 256 14 75180
MAX3084E Full 0.5 Yes No No 375 256 8 75179
MAX3085E Half 0.5 Yes Yes Yes 375 256 8 75176
MAX3086E Full 10 No Yes Yes 375 256 14 75180
MAX3087E Full 10 No No No 375 256 8 75179
MAX3088E Half 10 No Yes Yes 375 256 8 75176
MAX3089E Selectable Selectable Selectable Yes Yes 375 256 14 75180*
*Pin compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.15kV ESD-Protected,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_EC_ _ ...................................................0C to +70C
Receiver Input Voltage, Full Duplex (A, B) ..........................25V MAX308_EE_ _ ................................................-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 DE, DI, RE, H/F, TXP, RXP 2.0 V
IH1
Input Low Voltage V DE, DI, RE, H/F, TXP, RXP 0.8 V
IL1
MAX3080EMAX3085E, and MAX3089E 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
DE = GND,
Input Current (A and B) I A
IN4
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
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MAX3080EMAX3089E