19-2320; Rev 1; 3/11
±15kV ESD-Protected 52Mbps, 3V to 5.5V, SOT23
RS-485/RS-422 True Fail-Safe Receivers
General Description
The MAX3280E/MAX3281E/MAX3283E/MAX3284E are
single receivers designed for RS-485 and RS-422 com-
munication. These devices guarantee data rates up to
52Mbps, even with a 3V power supply. Excellent propa-
gation delay (15ns max) and package-to-package
skew time (8ns max) make these devices ideal for mul-
tidrop clock distribution applications.
The MAX3280E/MAX3281E/MAX3283E/MAX3284E
have true fail-safe circuitry, which guarantees a logic-
high receiver output when the receiver inputs are
opened or shorted. The receiver output will be a logic
high if all transmitters on a terminated bus are disabled
(high impedance). These devices feature 1/4-unit-load
receiver input impedance, allowing up to 128 receivers
on the same bus.
The MAX3280E is a single receiver available in a 5-pin
SOT23 package. The MAX3281E/MAX3283E single
receivers have a receiver enable (EN or
EN)
function
and are offered in a 6-pin SOT23 package. The
MAX3284E features a voltage logic pin that allows com-
patibility with low-voltage logic levels, as in digital
FPGAs/ASICs. On the MAX3284E, the voltage threshold
for a logic high is user-defined by setting V
L
in the
range from 1.65V to V
CC
. The MAX3284E is also
offered in a 6-pin SOT23 package.
Features
♦
ESD Protection:
±15kV Human Body Model
±6kV IEC 1000-4-2, Contact Discharge
±12kV IEC 1000-4-2, Air-Gap Discharge
♦
Guaranteed 52Mbps Data Rate
♦
Guaranteed 15ns Receiver Propagation Delay
♦
Guaranteed 2ns Receiver Skew
♦
Guaranteed 8ns Package-to-Package Skew Time
♦
V
L
Pin for Connection to FPGAs/ASICs
♦
Allow Up to 128 Transceivers on the Bus
(1/4-unit-load)
♦
Tiny SOT23 Package
♦
True Fail-Safe Receiver
♦
-7V to +12V Common-Mode Range
♦
3V to 5.5V Power-Supply Range
♦
Enable (High and Low) Pins for Redundant
Operation
♦
Three-State Output Stage (MAX3281E/MAX3283E)
♦
Thermal Protection Against Output Short Circuit
MAX3280E/MAX3281E/MAX3283E/MAX3284E
Applications
Clock Distribution
Telecom Racks
Base Stations
Industrial Control
Local Area Networks
Pin Configurations appear at end of data sheet.
PART
MAX3280EAUK+T
MAX3281EAUT+T
MAX3283EAUT+T
MAX3284EAUT+T
Ordering Information
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
5 SOT23-5
6 SOT23-6
6 SOT23-6
6 SOT23-6
TOP
MARK
ADVM
ABAT
ABAU
ABAV
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Selector Guide
PART
MAX3280E
MAX3281E
MAX3283E
MAX3284E
V
L
—
—
—
✔
ENABLE
—
Active High
Active Low
—
DATA RATE
52Mbps
52Mbps
52Mbps
52Mbps (Note 1)
PACKAGE
5-Pin SOT23
6-Pin SOT23
6-Pin SOT23
6-Pin SOT23
Note 1:
MAX3284E data rate is dependent on V
L
.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
