MAX3238

+3.0V to +5.5V, 1µA, Up to 250kbps, True RS-232 Transceiver with AutoShutdown Plus


Please check latest availability status for a specific part variant.

Description

The MAX3238 true RS-232 transceiver achieves a 1µA supply current with Maxim's revolutionary AutoShutdown Plus™ feature. When the device does not sense a valid signal transition on either the receiver or transmitter inputs within 30sec, the on-board power supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are inactive. The system turns on again when a valid transition is applied to any RS-232 receiver or transmitter input, saving power without changes to the existing BIOS or operating system.

The MAX3238 5-driver/3-receiver complete serial port is a 3V-powered EIA/TIA-232 and V.28/V.24 communications interface intended for notebook or subnotebook computer applications. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. A guaranteed data rate of 250kbps provides compatibility with popular software for communicating with personal computers. The MAX3238 requires only 0.1µF capacitors in 3.3V operation. It is ideal for 3.3V-only systems, mixed 3.3V and 5.0V systems, or 5V-only systems that require true RS-232 performance.

Receiver R1 has an extra, always-active output (in addition to its standard output), which allows external devices, such as a modem, to be monitored without forward biasing the protection diodes in circuitry that may have VCC completely removed.

The MAX3238 is available in a space-saving SSOP package.
MAX3238: Typical Operating Circuit MAX3238: Typical Operating Circuit Enlarge+

Key Features

  • 1µA Supply Current Achieved with AutoShutdown Plus
  • Guaranteed Data Rate: 250kbps
  • 1µA Low-Power Shutdown
  • Receivers Active in AutoShutdown Plus Mode
  • Flow-Through Pinout
  • Meets EIA/TIA-232 Specifications Down to 3.0V
  • Guaranteed 6V/µs Slew Rate
  • Auto shutdown reduces supply current to 1uA

Applications/Uses

  • Battery-Powered Applications
  • Handheld Equipment
  • High-Speed Modems
  • Notebook, Subnotebook, and Palmtop Computers
  • Peripherals
  • Printers

See parametric specs for RS-232 Line Driver/Receivers (136)


Part NumberVSUPPLY
(V)
TxRxData Rate
(kbps)
ICC
(mA)
Internal Charge PumpExt. CapsCap. Value
(µF)
Rx Active in ShutdnPackage/PinsBudgetary
Price
mintypnomSee Notes
MAX3238 
3.3
5
532500.5Yes40.10
SSOP/28
$4.04 @1k

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: MAX3238.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
Status:
Package:
Temperature:

Related Resources


MAX33073E
+3V to +5.5V, Polarity Invert RS-485 Half-Duplex Transceiver with ±65V Fault Protection, ±40V CMR, and ±40kV ESD

  • Integrated Protection for Robust Communication
  • High-Performance Transceiver Enables Flexible Designs

MAX33072E
+3V to +5.5V, Polarity Invert RS-485 Half-Duplex Transceiver with ±65V Fault Protection, ±40V CMR, and ±40kV ESD

  • Integrated Protection for Robust Communication
  • High-Performance Transceiver Enables Flexible Designs

MAX22088
Home Bus System (HBS) Compatible Transceiver

  • High Integration Reduces BOM and Footprint
  • Configurability Enables Flexible Design
  • Integrated Protection for Robust Communication

MAX14829
Low Power IO-Link Device Transceiver with Dual Drivers

  • Low Power Dissipation Reduces the Thermal Footprint for Small Sensors
  • High Configurability and Integration Reduce SKUs
  • Selectable Driver Integrated Protection Enables Robust Communication

MAX33011E
+5V, 5Mbps CAN Transceiver with ±65V Fault Protection, Fault Detection and Reporting, ±25V CMR, and ±40kV ESD Protection

  • Integrated Protection Increases Robustness
  • Family Provides Flexible Design Options
  • Fault Detection and Reporting

MAX33014E
+5V, 5Mbps CAN Transceiver with ±65V Fault Protection, Fault Detection and Reporting, ±25V CMR, and ±40kV ESD Protection

  • Integrated Protection Increases Robustness
  • Family Provides Flexible Design Options
  • Fault Detection and Reporting

MAX33012E
+5V, 5Mbps CAN Transceiver with ±65V Fault Protection, Fault Detection and Reporting, ±25V CMR, and ±40kV ESD Protection

  • Integrated Protection Increases Robustness
  • Family Provides Flexible Design Options
  • Fault Detection and Reporting

MAX33015E
+5V, 5Mbps CAN Transceiver with ±65V Fault Protection, Fault Detection and Reporting, ±25V CMR, and ±40kV ESD Protection

  • Integrated Protection Increases Robustness
  • Family Provides Flexible Design Options
  • Fault Detection and Reporting

MAX22028
Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

  • High-Level Integration Reduces Overall Solution Size
  • Integrated Protection Ensures Robust Communication
  • Enables Flexible System Design

MAX22027F
Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

  • High-Level Integration Reduces Overall Solution Size
  • Integrated Protection Ensures Robust Communication
  • Enables Flexible System Design

MAX22028F
Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

  • High-Level Integration Reduces Overall Solution Size
  • Integrated Protection Ensures Robust Communication
  • Enables Flexible System Design

MAX22025F
Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

  • High-Level Integration Reduces Overall Solution Size
  • Integrated Protection Ensures Robust Communication
  • Enables Flexible System Design

MAX22026
Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

  • High-Level Integration Reduces Overall Solution Size
  • Integrated Protection Ensures Robust Communication
  • Enables Flexible System Design

MAX22027
Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

  • High-Level Integration Reduces Overall Solution Size
  • Integrated Protection Ensures Robust Communication
  • Enables Flexible System Design

MAX22026F
Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

  • High-Level Integration Reduces Overall Solution Size
  • Integrated Protection Ensures Robust Communication
  • Enables Flexible System Design

MAX22025, MAX22025F
Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

  • High-Level Integration Reduces Overall Solution Size
  • Integrated Protection Ensures Robust Communication
  • Enables Flexible System Design

MAX22520
One-Time Programmable (OTP) Industrial Sensor Output Driver

  • High Configurability Supports a Wide Range of Sensor Designs
  • Robust Design for Harsh Industrial Environments
  • Small Form Factor for Compact Designs