MAX3388E:2.5V, ±15kV ESD-Protected RS-232 Transceivers for PDAs and Cell Phones

+2.5V RS-232 Transceivers for PDA HotSync

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.

Key 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 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)
MAX3388E, MAX3389E: Typical Operating Circuit
MAX3388E, MAX3389E: Typical Operating Circuit
Applications/Uses
  • Battery-Powered Applications
  • Cellular Data Cables
  • Handheld Equipment
  • PDAs and PDA Cradles
  • Peripherals
  • Subnotebook and Palmtop Computers
DataSheet
titleDownload file
MAX3388E-MAX3389E Data SheetMAX3388E-MAX3389E.pdf
Parametrics
Part NumberVSUPPLY
(V)
TxRxData Rate
(kbps)
ICC
(mA)
Internal Charge PumpExt. CapsCap. Value
(µF)
ESD Protect.
(±kV)
Package/PinsBudgetary
Price
mintypnomSee Notes
MAX3388E2.5
3
324600.3Yes40.115TSSOP/24$3.43 @1k
MAX3389ETSSOP/24$4.95 @1k
Related Products
  • MAX3386E:3.0V, ±15kV ESD-Protected RS-232 Transceivers for PDAs and Cell Phones
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3388ECUGNo Longer AvailableMAX3388ECUG+TSSOP,;24 pin;52.4 mm²0°C to +70°CNo
MAX3388ECUG+ActiveTSSOP,;24 pin;52.4 mm²0°C to +70°CLead Free
MAX3388ECUG+TActiveTSSOP,;24 pin;52.4 mm²0°C to +70°CLead Free
MAX3388ECUG-TNo Longer AvailableMAX3388ECUG+TTSSOP;24 pin0°C to +70°CSee data sheet
MAX3388EEUGNo Longer AvailableMAX3388EEUG+TSSOP,;24 pin;52.4 mm²-40°C to +85°CNo
MAX3388EEUG+ActiveTSSOP,;24 pin;52.4 mm²-40°C to +85°CLead Free
MAX3388EEUG+TActiveTSSOP,;24 pin;52.4 mm²-40°C to +85°CLead Free
MAX3388EEUG-TNo Longer AvailableMAX3388EEUG+TTSSOP,;24 pin;52.4 mm²-40°C to +85°CNo
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