Features: VL Pin for Compatibility with Mixed-Voltage Systems
Additional I/O for Hot-Sync Applications
±15kV ESD Protection on Rx Inputs, Tx Outputs, LIN, and SWIN
Low 300A Supply Current
Guaranteed 460kbps Data Rate
1A Low-Power Shutdown
Integrated Switch for Powering Remote Circuitry
Flow-Through Pinout
LOUT Active During Shutdown (MAX3389E)ApplicationSubnotebook/Palmtop Computers
PDAs and PDA Cradles
Cell Phone Data Cables
Battery-Powered Equipment
Hand-Held Equipment
PeripheralsPinout
SpecificationsVCC to GND...............................................................-0.3V to +6V
VL to GND....................................................-0.3V to (VCC + 0.3V)
V+ to GND ................................................................-0.3V to +7V
V- to GND .................................................................+0.3V to -7V
V+ +V-(Note 1) ..............................................................+13V
Input Voltages
T_IN, SHDN, LIN to GND............................................-0.3V to +6V
R_IN to GND ........................................................................±25V
SWIN to GND...............................................-0.3V to (VCC + 0.3V)
Output Voltages
T_OUT to GND...................................................................±13.2V
R_OUT, SWOUT, LOUT to GND .......................-0.3V to (VL + 0.3V)
Short-Circuit Duration T_OUT to GND.........................Continuous
Continuous Power Dissipation (TA = +70°C)
24-Pin TSSOP (derate 12.2mW/°C above +70°C) ..........975mW
Operating Temperature Ranges
MAX338_ECUG ......................................................0°C to +70°C
MAX338_EEUG....................................................-40°C to +85°C
Junction Temperature.....................................................+150°C
Storage Temperature Range ...........................-65°C to +150°C
Lead Temperature (soldering, 10s) ...............................+300°C
DescriptionThe MAX3388E/MAX3389E are 2.5V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. They have two receivers and three transmitters. All RS-232 inputs and outputs are protected to ±15kV using the IEC 1000-4-2 Air-Gap Discharge method, ±8kV using the IEC 1000-4-2 Contact Discharge method, and ±15kV using the Human Body Model.
In addition to the traditional RS-232 I/O, these devices have dedicated logic-level I/O pins for additional device-todevice handshaking. During shutdown the logic-level I/O pins are active for the MAX3389E. An internal 62 switch is provided to switch power to external circuitry or modules.
A proprietary low-dropout transmitter output stage enables RS-232 compatible performance from a +2.35V to +3.0V supply with a dual charge pump. The charge pump requires only four small 0.1F capacitors for operation from a +2.5V supply. The MAX3388E/MAX3389E are capable of running at data rates up to 460kbps while maintaining RS-232-compatible output levels.
The MAX3388E/MAX3389E have a unique VL pin that allows interoperation in mixed-logic voltage systems. Both input and output logic levels are pin programmable through the VL pin. The MAX3388E/MAX3389E are available in a space-saving TSSOP package.
MAX3389E Data Sheet
