3.3V, ±15kV ESD Protected, Two Port, Dual Protocol (RS-232/RS-485) Transceivers

The ISL3332, ISL3333 are two port interface ICs where each port can be independently configured as a single RS-485/422 transceiver, or as a dual (2 Tx, 2 Rx) RS-232 transceiver. With both ports set to the same mode, two RS-485/RS-422 transceivers, or four RS-232 transceivers are available.

If either port is in RS-232 mode, the onboard charge pump generates RS-232 compliant ±5V Tx output levels from a single VCC supply as low as 3.15V. The transceivers are RS-232 compliant, with the Rx inputs handling up to ±25V.

Features

• ±15kV (HBM) ESD Protected Bus Pins (RS-232 or RS-485)

• Operates From a Single 3.3V Supply

• Two Independent Ports, Each User Selectable for RS-232

(2 Transceivers) or RS-485/RS-422 (1 Transceiver)

• True Flow-Through Pinouts Simplify Board Layouts

• Pb-free (RoHS compliant)

• Full Failsafe (Open/Short) Rx in RS-485/422 Mode

• Loopback Mode Facilitates Board Self Test Functions

• User Selectable RS-485 Data Rates (ISL3333 Only)

- Fast Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Mbps

- Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 460kbps

- Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 115kbps

• Fast RS-232 Data Rate . . . . . . . . . . . . . . . Up to 400kbps

• RS-232 Tx and Rx Enable Pins (ISL3333 Only)

• Small Charge Pump Caps . . . . . . . . . . . . . . . . . 4 x 0.1µF

• Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . .35µA

• QFN Package Saves Board Space (ISL3333 Only)

• Logic Supply Pin (VL) Eases Operation in Mixed Supply Systems (ISL3333 Only)

Applications

• Gaming Applications (e.g., Slot Machines)

• Single Board Computers

• Factory Automation

• Security Networks

• Industrial/Process Control Networks

• Level Translators (e.g., RS-232 to RS-422)

• Point of Sale Equipment

• Dual Channel RS-485 Interfaces