General Description
The UM3352E series are ±12kV ESD-protected, high-speed transceivers for RS-485 communication that contain one driver and one receiver. The device features fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open, shorted or idle. This means that the receiver output will be logic high if all transmitters on a terminated bus are disabled (high impedance). The UM3352E features reduced slew-rate driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission up to 500kbps. It also features enhanced ESD protection. All transmitter outputs and receiver inputs are protected to ±12kV using IEC61000-4-2, Air-Gap Discharge.

FEATUREs
● ESD Protection for RS-485 I/O Pins
   ±12kV—IEC61000-4-2, Air-Gap Discharge
● True Fail-Safe Receiver while Maintaining
   EIA/TIA-485 Compatibility
● Enhanced Slew-Rate Limiting Facilitates
   Error-Free Data Transmission
● 2nA Low-Current Shutdown Mode
● –7V to +12V Common-Mode Input Voltage
   Range
● Allows up to 256 Transceivers on the Bus
● Thermal Shutdown
● Current-Limiting for Driver Overload
   Protection

APPLICATIONs
● RS-485 Transceivers
● Level Translators
● Industrial-Control Local Area
   Networks
● Transceivers for EMI-Sensitive
   Applications