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+5V, 1µA, Single RS-232 Transceiver with AutoShutdown

Industry's Smallest, Low-Power Single RS-232 Transceiver

Product Details

Key Features

Parametric specs for RS-232 Line Driver/Receivers
# Rx 1
# Tx 1
VSUPPLY (V) 5
Data Rate (kbps) (min) 250
ICC (mA) (typ) 5
Internal Charge Pump Yes
External Caps 4
Cap. Value (µF) (nom) 0.1
Package/Pins SSOP/16
TSSOP/16
Budgetary
Price (See Notes)
1.86
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Simplified Block Diagram

Technical Docs

Support & Training

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for RS-232 Line Driver/Receivers
# Rx 1
# Tx 1
VSUPPLY (V) 5
Data Rate (kbps) (min) 250
ICC (mA) (typ) 5
Internal Charge Pump Yes
External Caps 4
Cap. Value (µF) (nom) 0.1
Package/Pins SSOP/16
TSSOP/16
Budgetary
Price (See Notes)
1.86

Key Features

  • Single RS-232 Transceiver in a Small 16-Pin TSSOP Package
  • 1µA Supply Current
  • AutoShutdown Saves Power Without Changes to BIOS
  • Guaranteed 250kbps Data Rate

Applications/Uses

  • Industrial Systems
  • Maintenance/Diagnostic Ports
  • Set-Top Boxes
  • Telecommunications

Description

The MAX221 is a +5V-powered, single transmit/receive RS-232 and V.28 communications interface with automatic shutdown/wake-up features and high data rate capabilities.

The MAX221 achieves a low 1µA supply current with Maxim's revolutionary AutoShutdown™ feature. AutoShutdown saves power without changes to the existing BIOS or operating system by entering low-power shutdown mode when the RS-232 cable is disconnected, or when the transmitter of the connected peripheral is off. The MAX221 wakes up and drives the active-low INVALID pin high when an active RS-232 cable is connected, signaling the host that a peripheral is connected to the communications port.

The MAX221 is available in a 16-pin SSOP package as well as a 16-pin TSSOP that uses 50% less board space than a 16-pin SO. For an equivalent RS-232 transceiver with enhanced ±15kV ESD protection, refer to the MAX221E data sheet.

Simplified Block Diagram

MAX221: Typical Operating Circuit MAX221: Typical Operating Circuit Zoom icon

Technical Docs

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.