MAX3430ESA

Product Summary

The MAX3430ESA fault-protected RS-485 transceiver features ±80V protection from overvoltage signal faults on communication bus lines. Each device contains one driver and one receiver, and the output pins can withstand faults, with respect to ground, of up to ±80V. Even if the faults occur when the transceiver is active, shut down, or powered off, the device will not be damaged. The MAX3430ESA operates from a 3.3V supply and features a slew-rate-limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing errorfree data transmission at data rates up to 250kbps. The MAX3430ESA has a 1/4-unit-load receiver input impedance allowing up to 128 transceivers on a single bus and features fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open. Hot-swap circuitry eliminates false transitions on the data cable during circuit initialization or connection to a live backplane. Short-circuit current limiting and thermal-shutdown circuitry protect the driver against excessive power dissipation. The MAX3430ESA is available in 8-pin SO and 8-pin PDIP packages, and is specified over commercial and industrial temperature ranges.

Parametrics

MAX3430ESA absolute maximum ratings: (1)VCC: +5V; (2)RE, DE, DI: -0.3V to (VCC + 0.3V); (3)Driver Output Voltage (A, B): ±80V; (4)Receiver Input Voltage (A, B): ±80V; (5)RO: -0.3V to (VCC + 0.3V); (6)Power Dissipation (TA = +70℃) of 8-Pin SO (derate 5.88mW/℃ above +70℃): 471mW; (7)Power Dissipation (TA = +70℃) of 8-Pin Plastic DIP (derate 9.09mW/℃ above +70℃): 727mW; (8)Operating Temperature Ranges: -40℃ to +85℃; (9)Junction Temperature: +150℃; (10)Storage Temperature Range: -65℃ to +150℃; (11)Lead Temperature (soldering, 10s): +300℃.

Features

MAX3430ESA features: (1)±80V Fault Protection; (2)±12kV ESD Protection; (3)+3.3V Operation; (4)Internal Slew-Rate Limiting; (5)250kbps Data Rate; (6)Allows Up to 128 Transceivers on the Bus; (7)-7V to +12V Common-Mode Input Voltage Range; (8)True Fail-Safe Inputs; (9)Hot-Swap Input Structure on DE; (10)Available in 8-Pin SO and PDIP Packages.

Diagrams