General Description

The MAX3238E/MAX3248E transceivers use Maxim’s revolutionary AutoShutdown Plus™ feature to achieve 10nA supply current. These devices shut down the on board power supply and drivers when they do not sense a valid signal transition on either the receiver or transmitter inputs. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are turned off. The devices turn on again when a valid transition is applied to any RS-232 receiver or transmitter input. AutoShutdown Plus automatically achieves this power savings through its on-board circuitry, as no changes are required to the existing BIOS or operating system.

Features

♦ Enhanced ESD Protection on RS-232 I/O Pins and All Logic Pins

±15kV—Human Body Model

±8kV—IEC 1000-4-2 Contact Discharge

±15kV—IEC 1000-4-2 Air-Gap Discharge

♦ Guaranteed Data Rate: 250kbps

♦ 10nA Low-Power Shutdown with Receivers Active

♦ Schmitt Triggers on All Inputs

♦ Flow-Through Pinout

♦ Meets EIA/TIA-232 Specifications Down to 3.0V

♦ Guaranteed 6V/µs Slew Rate

♦ Low-Level Logic Thresholds (MAX3248E)

♦ RS-232-Compatible Outputs to 2.7V