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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 Applications/Uses Clock/Data Distribution Industrial Controls Local Area Networks (LANs) Telecom Racks Wireless Base Stations

DataSheet

Parametrics

Quality and Environmental Data

• MAX3281E.pdf

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