MAX3388E
2.5V, ±15kV ESD-Protected RS-232 Transceivers for PDAs and Cell Phones
+2.5V RS-232 Transceivers for PDA HotSync
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Overview
Features and Benefits
- 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 300µA Supply Current
- Guaranteed 460kbps Data Rate
- 1µA Low-Power Shutdown
- Integrated Switch for Powering Remote Circuitry
- Flow-Through Pinout
- LOUT Active During Shutdown (MAX3389E)
Product Details
The 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. The MAX3388E/MAX3389E 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-to-device handshaking. During shutdown the logic-level I/O pins are active for the MAX3389E. An internal 62Ω 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 0.1µF 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.
Applications
- Battery-Powered Applications
- Cellular Data Cables
- Handheld Equipment
- PDAs and PDA Cradles
- Peripherals
- Subnotebook and Palmtop Computers
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface3/8/2011
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Oops...Practical ESD Protection vs. Foolhardy Placebos3/2/2011
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Lower the Supply Current in Your RS-232 System12/27/2002
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Analog Devices Leads the Way in ESD Protection10/3/2000
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ESD Protection for I/O Ports3/13/2000
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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