EVALUATION KIT AVAILABLE
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
AVAILAB
LE
General Description
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.
These transceivers typically draw 375µA of supply
current when unloaded, or when fully loaded with the
drivers disabled.
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.
Next Generation Device Features
♦
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
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Ordering Information
PART
MAX3080CSD
MAX3080CPD
MAX3080ESD
MAX3080EPD
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
14 Plastic DIP
14 SO
14 Plastic DIP
Functional Diagrams
Ordering Information continued at end of data sheet.
Selection Table
Part
MAX3080
MAX3081
MAX3082
MAX3083
MAX3084
MAX3085
MAX3086
MAX3087
MAX3088
Half/Full
Duplex
Full
Full
Half
Full
Full
Half
Full
Full
Half
Data
Rate
(Mbps)
0.115
0.115
0.115
0.5
0.5
0.5
10
10
10
Slew
Rate
Limited
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Low-
Power
Shutdown
Yes
No
Yes
Yes
No
Yes
Yes
No
Yes
Receiver/
Driver
Enable
Yes
No
Yes
Yes
No
Yes
Yes
No
Yes
Quiescent Transceivers
Current
On
(µA)
Bus
375
375
375
375
375
375
375
375
375
256
256
256
256
256
256
256
256
256
256
Pin
Count
14
8
8
14
8
8
14
8
8
14
Industry-
Standard
Pinout
75180
75179
75176
75180
75179
75176
75180
75179
75176
75180*
MAX3089
Selectable Selectable
Yes
Yes
375
Pin Configurations appear at end of data
Selectable
sheet.
Functional Diagrams continued at end
features implemented using pins 1, 6, 8, and 13.
*Pin-compatible with 75180, with additional
of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1138; Rev 3; 12/05
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
