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5V, Isolated, RS-232 Driver Receiver

Product Details

Key Features

Applications/Uses

Parametric specs for RS-232 Line Driver/Receivers
# Rx 2
# Tx 2
VSUPPLY (V) 5
Data Rate (kbps) (min) 116
ICC (mA) (typ) 0.1
Internal Charge Pump Yes
Package/Pins PDIP/14
SOIC (N)/14
Budgetary
Price (See Notes)
4.39
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Simplified Block Diagram

Technical Docs

Data Sheet 5V, Isolated, RS-232 Driver Receiver Jul 01, 1989

Support & Training

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Parameters

Parametric specs for RS-232 Line Driver/Receivers
# Rx 2
# Tx 2
VSUPPLY (V) 5
Data Rate (kbps) (min) 116
ICC (mA) (typ) 0.1
Internal Charge Pump Yes
Package/Pins PDIP/14
SOIC (N)/14
Budgetary
Price (See Notes)
4.39

Key Features

  • Isolated Data Interface
  • Single +5V Supply
  • Uses Low Cost Optocouplers
  • 5µW Power Shutdown
  • 2 Transmitters and 2 Receivers

Applications/Uses

  • Bridge Ground Differentials
  • Data Links To Analog Circuits
  • High Noise Data Communications
  • Industrial Communications

Description

The MAX250 and MAX251 chip set form the heart of a complete, electronically isolated, RS-232 dual transmitter/receiver. By combining many functions on two chips, the cost and complexity required for an isolated digital interface is greatly reduced. Four low cost optocouplers, four capacitors, a diode and a small pot-core type transformer are all that are required to complete a 19.2k baud transceiver. Faster data rates are possible by using high speed optocouplers. In addition to the driving and receiving circuitry for the optocouplers, the chip set includes a push-pull transformer driver to supply power to the interface's isolated side.

Other convenient features include single +5V operation, a low power shutdown mode, and output enable control for three-state operation. The MAX250 and MAX251 are supplied in 14 lead DIP, 14 lead small outline and 20 leadless chip carrier packages.

The MAX252 has all the required components for RS-232 communication in a single package.

Simplified Block Diagram

MAX250, MAX251: Pin Configuration MAX250, MAX251: Pin Configuration Zoom icon

Technical Docs

Data Sheet 5V, Isolated, RS-232 Driver Receiver Jul 01, 1989

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .