MAX3243ECAI ±15kV ESD-Protected Integrated Circuit Chip RS-232 Transceivers with AutoShutdown

MAX3243ECAI ±15kV ESD-Protected,RS-232 Transceivers with AutoShutdown

General Description

The MAX3221E/MAX3223E/MAX3243E are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wakeup features, high datarate capabilities, and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 AirGap Discharge, to ±8kV using IEC 1000-4-2 Contact Discharge, and to ±15kV using the Human Body Model. The MAX3221E/MAX3223E/MAX3243E achieve a 1µA supply current with Maxim’s revolutionary AutoShutdown™ feature. They save power without changes to the existing BIOS or operating system by entering low-power shutdown mode when the RS-232 cable is disconnected, or when the transmitters of the connected peripherals are off. The transceivers have a proprietary low-dropout transmitter output stage, delivering true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a +3.3V supply. Each device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels. The MAX3221E contains just one driver and one receiver, making it the smallest single-supply RS-232 transceiver. The MAX3223E has two drivers and two receivers. The MAX3243E is a complete 3-driver/5-receiver serial port ideal for notebook or subnotebook computers. It also includes two noninverting receiver outputs that are always active, allowing external devices to be monitored without forward biasing the protection diodes in circuitry that may be powered down. The MAX3221E, MAX3223E, and MAX3243E are available in space-saving SSOP packages.

Features

ESD Protection for RS-232 I/O Pins: ±15kV—Human Body Model ±8kV—IEC1000-4-2, Contact Discharge ±15kV—IEC1000-4-2, Air-Gap Discharge

Latchup Free

1µA Supply Current

250kbps Guaranteed Data Rate

6V/µs Guaranteed Slew Rate

Meets EIA/TIA-232 Specifications Down to 3.0V  

Smallest Single-Supply RS-232 Transceiver (MAX3221E)

Guaranteed Mouse Driveability (MAX3243E)

Small 0.1µF Capacitors

Ordering Information

Selector Guide

ABSOLUTE MAXIMUM RATINGS

VCC to GND..............................................................-0.3V to +6V

V+ to GND (Note 1)..................................................-0.3V to +7V

V- to GND (Note 1) ...................................................+0.3V to -7V

V+ + |V-| (Note 1) .................................................................+13V

Input Voltages

T_IN, EN, FORCEON, FORCEOFF to GND ............-0.3V to +6V

R_IN to GND ......................................................................±25V

Output Voltages

T_OUT to GND................................................................±13.2V

R_OUT, R2OUTB, INVALID to GND.........-0.3V to (VCC + 0.3V)

Short-Circuit Duration

T_OUT to GND .........................................................Continuous

Continuous Power Dissipation (TA = +70°C)

16-Pin SSOP (derate 7.14mW/°C above +70°C) ...........571mW

20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW

20-Pin SSOP (derate 8.00mW/°C above +70°C) ...........640mW

28-Pin Wide SO (derate 12.50mW/°C above +70°C)............1W

28-Pin SSOP (derate 9.52mW/°C above +70°C)............762mW

Operating Temperature Ranges

MAX32_ _EC_ _ ....................................................0°C to +70°C

MAX32_ _EE_ _..................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

ELECTRICAL CHARACTERISTICS