EVALUATION KIT AVAILABLE
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
General Description
Next Generation Device Features
The MAX3080–MAX3089 high-speed transceivers for
RS-485/RS-422 communication contain one driver and
one receiver. These devices feature fail-safe circuitry,
which guarantees a logic-high receiver output when the
receiver inputs are open or shorted. This means that
the receiver output will be a logic high if all transmitters
on a terminated bus are disabled (high impedance).
The MAX3080/MAX3081/MAX3082 feature reduced
slew-rate drivers that minimize EMI and reduce reflec-
tions caused by improperly terminated cables, allowing
error-free data transmission up to 115kbps. The
MAX3083/MAX3084/MAX3085 offer higher driver out-
put slew-rate limits, allowing transmit speeds up to
500kbps. The MAX3086/MAX3087/MAX3088’s driver
slew rates are not limited, making transmit speeds up
to 10Mbps possible. The MAX3089’s slew rate is
selectable between 115kbps, 500kbps, and 10Mbps
by driving a selector pin with a single three-state driver.
♦ For Fault-Tolerant Applications:
MAX3430: 80V Fault-Protected, Fail-Safe, 1/4-
Unit Load, +3.3V RS-485 Transceiver
♦ For Low-Voltage Applications:
MAX3362: +3.3V, High-Speed, RS-485/RS-422
Transceiver in a SOT23 Package
♦ For Multiple Transceiver Applications:
MAX3030E–MAX3033E: 15kV ESD-Protected,
+3.3V, Quad, RS-422 Transmitters
MAX3040–MAX3045: 10kV ESD-Protected, Quad,
+5V, RS-485/RS-422 Transmitters
Applications
RS-422/RS-485 Communications
Level Translators
These transceivers typically draw 375µA of supply
current when unloaded, or when fully loaded with the
drivers disabled.
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
All devices have a 1/8-unit-load receiver input imped-
ance that allows up to 256 transceivers on the bus. The
MAX3082/MAX3085/MAX3088 are intended for half-
duplex communications, while the MAX3080/MAX3081/
MAX3083/MAX3084/MAX3086/MAX3087 are intended
for full-duplex communications. The MAX3089 is selec-
table between half-duplex and full-duplex operation. It
also features independently programmable receiver
and transmitter output phase via separate pins.
Ordering Information
PART
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
14 SO
MAX3080CSD
MAX3080CPD
MAX3080ESD
MAX3080EPD
14 Plastic DIP
14 SO
14 Plastic DIP
Ordering Information continued at end of data sheet.
Selection Table
Data
Rate
(Mbps)
Slew
Rate
Limited
Low-
Power
Shutdown
Receiver/ Quiescent Transceivers
Industry-
Standard
Pinout
Half/Full
Duplex
Pin
Count
Part
Driver
Current
(µA)
On
Enable
Bus
MAX3080
MAX3081
MAX3082
MAX3083
MAX3084
MAX3085
MAX3086
MAX3087
MAX3088
Full
Full
Half
Full
Full
Half
Full
Full
Half
0.115
0.115
0.115
0.5
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Yes
No
375
375
375
375
375
375
375
375
375
375
256
256
256
256
256
256
256
256
256
256
14
8
75180
75179
75176
75180
75179
75176
75180
75179
75176
75180*
Yes
Yes
No
Yes
Yes
No
8
14
8
0.5
0.5
Yes
Yes
No
Yes
Yes
No
8
10
14
8
10
No
10
No
Yes
Yes
Yes
Yes
8
MAX3089 Selectable Selectable Selectable
14
*Pin-compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.
For pricing, delivery, and ordering information, please contact Maxim Direct
19-1138; Rev 3; 12/05
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.