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MAX3385E
±15kV ESD-Protected, 3.0 to 5.5V, Low-Power, Up to 250kbps, True RS-232 Transceiver


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 192kB)
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Description
The MAX3385E is a 3V-powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model.

The transceiver has 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 MAX3385E has two receivers and two drivers. It features a 1µA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1µA supply current.

The MAX3385E is available in a space-saving SSOP package in either the commercial (0°C to +70°C) or extended-industrial (-40°C to +85°C) temperature range.

Key Features   Applications/Uses
  • ESD Protection for RS-232 I/O Pins
    • ±15kV-Human Body Model
    • ±8kV-IEC 1000-4-2, Contact Discharge
    • ±15kV-IEC 1000-4-2, Air-Gap Discharge
  • Latchup Free
  • 300µA Supply Current
  • 1µA Low-Power Shutdown with Receivers Active
  • 250kbps Guaranteed Data Rate
  • 250µs Time to Exit Shutdown with 3-kilohm Load on V+
  • 6V/µs Guaranteed Slew Rate
  • Meets EIA/TIA-232 Specifications Down to 3.0V

 

Key Specifications:  RS-232 Line Driver/Receivers
Part Number VSUPPLY
(V)
Tx Rx Data Rate
(kbps)
ICC
(mA)
Internal Charge Pump Ext. Caps Cap. Value
(µF)
ESD Protect.
(±kV)
Rx Active in Shutdn Package/Pins Price
min typ nom See Notes
MAX3385E 
3.3
5
2 2 250 0.3 Yes 5 0.1 15 2
SOIC(W)/18
SSOP/20
$2.24 @1k
See All RS-232 Line Driver/Receivers (152)

Diagram
MAX3385E: Typical Operating Circuit
Typical Operating Circuit

Application Notes
  • Application Note 836: Selecting and using RS-232 Interface Parts for Your Power Supply Voltages - MAX3385E

    Design Guides
  • Interface (PDF)

    Reliability Reports
  • Show FIT data for:
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    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-5 of 5

    MAX3385E Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3385ECWN    
    Active SOIC(W);18 pin;125.1 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0181 (PDF)
    Use pkgcode/variation: W18-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3385ECWN-T    
    Active

    Land Pattern: Not Available

    0°C to +70°C See data sheet
    MAX3385ECAP    
    Active SSOP;20 pin;57.9 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3385ECAP-T    
    Active SSOP;20 pin;57.9 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3385EEAP    
    Active SSOP;20 pin;57.9 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-2*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    Notes and Comments
  • ESD Protection for RS-232 I/O pins, latchup free, 1µA low-power shutdown with receivers ActiveMeets EIA/TIA-232 specifications down to 3.0V

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    Document Ref.: 19-1437; Rev 1; 1999-10-01
    This page last modified: 2007-07-20


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