MAX3280E Datasheet, PDF (1/11 Pages) Maxim Integrated Products – ±15kV ESD-Protected 52Mbps, 3V to 5.5V, SOT23 RS-485/RS-422 True Fail-Safe Receivers

19-2320; Rev 0; 1/02
±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
o ESD Protection:
±15kV–Human Body Model
±6kV–IEC 1000-4-2, Contact Discharge
±12kV–IEC 1000-4-2, Air-Gap Discharge
o Guaranteed 52Mbps Data Rate
o Guaranteed 15ns Receiver Propagation Delay
o Guaranteed 2ns Receiver Skew
o Guaranteed 8ns Package-to-Package Skew Time
o V_L Pin for Connection to FPGAs/ASICs
o Allow Up to 128 Transceivers on the Bus
(1/4-unit-load)
o Tiny SOT23 Package
o True Fail-Safe Receiver
o -7V to +12V Common-Mode Range
o 3V to 5.5V Power-Supply Range
o Enable (High and Low) Pins for Redundant
Operation
o Three-State Output Stage (MAX3281E/MAX3283E)
o Thermal Protection Against Output Short Circuit
Clock Distribution
Telecom Racks
Base Stations
Industrial Control
Local Area Networks
Applications
Pin Configurations appear at end of data sheet.
Ordering Information
PART
MAX3280EAUK-T
MAX3281EAUT-T
MAX3283EAUT-T
MAX3284EAUT-T
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
Selector Guide
PART
V_L
MAX3280E
—
MAX3281E
—
MAX3283E
—
MAX3284E
✔
Note 1: MAX3284E data rate is dependent on 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
________________________________________________________________ Maxim Integrated Products 1
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1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.