Active Member
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[China]
Address: Room 36B1-B2, Building C, Electronics Science & Technology Building Shennan Mid-Road, Shenzhen China
Contact name:Sharon Yang
Anterwell Technology Ltd. |
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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
| PARAMETER | SYMBOL | CONDITIONS | MIN TYP MAX | UNITS | |
| DC CHARACTERISTICS (VCC = 3.3V or 5.0V, TA = +25°C) | |||||
| Supply Current, AutoShutdown | FORCEON = GND, FORCEOFF = VCC, all R_IN open | 1.0 10 | µA | ||
| Supply Current, Shutdown | FORCEOFF = GND | 1.0 10 | µA | ||
| Supply Current, AutoShutdown Disabled | FORCEON = FORCEOFF = VCC, no load | 0.3 1 | mA | ||
| LOGIC INPUTS | |||||
| Input Logic Threshold Low | T_IN, EN, FORCEON, FORCEOFF | 0.8 | V | ||
| Input Logic Threshold High | T_IN, EN, FORCEON, RCEON, VCC = 3.3V F | VCC = 3.3V | 2.0 | V | |
| VCC = 5.0V | 2.4 | ||||
| Transmitter Input Hysteresis | 0.5 | V | |||
| Input Leakage Current | T_IN, EN, FORCEON, FORCEOFF | ±0.01 ±1 | µA | ||
| RECEIVER OUTPUTS | |||||
| Output Leakage Current | R_OUT receivers disabled | ±0.05 ±10 | µA | ||
| Output Voltage Low | IOUT = 1.6mA | 0.4 | V | ||
| Output Voltage High | IOUT = -1.0mA | VCC - 0.6 VCC - 0.1 | V | ||
| AUTOSHUTDOWN (FORCEON = GND, FORCEOFF = VCC) | |||||
| Receiver Input Threshold to INVALID Output High | Figure 5a | Positive threshold | 2.7 | ||
| Negative threshold | 2.7 | ||||
| Receiver Input Threshold to INVALID Output Low | |||||
| INVALID Output Voltage Low | IOUT = 1.6mA | 0.4 | V | ||
| INVALID Output Voltage High | IOUT = -1.0mA | VCC - 0.6 | V | ||
