MAX3385E

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

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Status Explanations for product status codes

Active: In Production.

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.
 

Data Sheet

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Key Features

  • 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
 

Applications/Uses

  • Battery-Powered Applications
  • Handheld Equipment
  • Peripherals
  • Printers
   

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
min typ nom
MAX3385E 
3.3
5
2 2 250 0.3 Yes 5 0.1 15 2
SOIC(W)/18
SSOP/20
See All RS-232 Line Driver/Receivers (152)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


Diagram

MAX3385E: Typical Operating Circuit
Typical Operating Circuit

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: 2010-05-06




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