MAX3281E:±15kV ESD-Protected 52Mbps, 3V to 5.5V, SOT23 RS-485/RS-422 True Fail-Safe Receivers

Industry's First RS-485/RS-422 SOT Receivers

The MAX3280E/MAX3281E/MAX3283E/MAX3284E are single receivers designed for RS-485 and RS-422 communication. These devices guarantee data rates up to 52Mbps, even with a 3V power supply. Excellent propagation delay (15ns max) and package-to-package skew time (8ns max) make these devices ideal for multidrop 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 active-low EN) function and are offered in a 6-pin SOT23 package. The MAX3284E features a voltage logic pin that allows compatibility 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 VL in the range from 1.65V to VCC. The MAX3284E is also offered in a 6-pin SOT23 package.

Key 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
  • VL 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: Typical Operating Circuit
MAX3280E, MAX3281E, MAX3283E, MAX3284E: Typical Operating Circuit
Applications/Uses
  • Clock/Data Distribution
  • Industrial Controls
  • Local Area Networks (LANs)
  • Telecom Racks
  • Wireless Base Stations
DataSheet
titleDownload file
MAX3280E-MAX3284E Data SheetMAX3280E-MAX3284E.pdf
Parametrics
Part NumberTx/RxVSUPPLY
(V)
ICC
(mA)
Data Rate
(kbps)
ESD Protect.
(±kV)
Tx ENRx ENRx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
(°C)
Package/PinsBudgetary
Price
typminSee Notes
MAX3280E1Rx3.3
3.0 to 5.5
5
95200015NoNo128Open or ShortedNo-40 to +125SOT/5$0.63 @1k
MAX3281EYesSOT/6$0.63 @1k
MAX3283EYesSOT/6$0.63 @1k
MAX3284ENoSOT/6$0.61 @1k
Quality and Environmental Data
Related Products
  • MAX3485E:3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited True RS-485/RS-422 Transceivers
  • MAX485E:±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3281EAUTNo Longer AvailableMAX3281EAUT+SOT,;6 pin;9 mm²-40°C to +125°CNo
MAX3281EAUT+ActiveSOT,;6 pin;9 mm²-40°C to +125°CLead Free
MAX3281EAUT+TActiveSOT,;6 pin;9 mm²-40°C to +125°CLead Free
MAX3281EAUT-TNo Longer AvailableMAX3281EAUT+TSOT,;6 pin;9 mm²-40°C to +125°CNo
MAX3280E-MAX3284E.pdf MAX3284E
MAX3281E.pdf MAX3281E
MAX3280E-MAX3284E.pdf MAX3284E