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MAX3243E

ACTIVE

3- to 5.5-V multichannel 500kbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

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Data sheet

MAX3243E

ACTIVE
Data sheet Order now

Product details

Drivers per package 3 Receivers per package 5 Logic voltage (min) (V) 3.3 Data rate (max) (Mbps) 0.5 Main supply voltage (nom) (V) 3.3, 5 Features Auto-Powerdown ESD HBM (kV) 15 Rating Catalog Operating temperature range (°C) -40 to 85 Vout (typ) (V) 5.4
Drivers per package 3 Receivers per package 5 Logic voltage (min) (V) 3.3 Data rate (max) (Mbps) 0.5 Main supply voltage (nom) (V) 3.3, 5 Features Auto-Powerdown ESD HBM (kV) 15 Rating Catalog Operating temperature range (°C) -40 to 85 Vout (typ) (V) 5.4
SSOP (DB) 28 79.56 mm² (10.2 mm × 7.8 mm) SOIC (DW) 28 184.37 mm² (17.9 mm × 10.3 mm) VQFN (RHB) 32 25 mm² (5 mm × 5 mm) TSSOP (PW) 28 62.08 mm² (9.7 mm × 6.4 mm)
  • Single-chip and single-supply interface for IBM™ PC/AT™ serial port
  • ESD Protection for RS-232 bus pins
    • ±15-kV Human-body model (HBM)
    • ±8-kV IEC61000-4-2, contact discharge
    • ±15-kV IEC61000-4-2, air-gap discharge
  • Meets or exceeds requirements of TIA/EIA-232-F and ITU V.28 standards
  • Operates with 3-V to 5.5-V VCC supply
  • Always-active noninverting receiver output (ROUT2B)
  • Designed to transmit at a data rate up to 500 kbit/s
  • Low standby current: 1 µA typical
  • External capacitors: 4 × 0.1 µF
  • Accepts 5-V logic input with 3.3-V supply
  • Designed to Be interchangeable with maxim MAX3243E
  • Serial-Mouse Driveability
  • Auto-powerdown feature to disable driver outputs when no valid RS-232 signal is sensed
  • Package options include plastic small-outline (DW), shrink small-outline (DB), and thin shrink small-outline (PW) packages
  • Single-chip and single-supply interface for IBM™ PC/AT™ serial port
  • ESD Protection for RS-232 bus pins
    • ±15-kV Human-body model (HBM)
    • ±8-kV IEC61000-4-2, contact discharge
    • ±15-kV IEC61000-4-2, air-gap discharge
  • Meets or exceeds requirements of TIA/EIA-232-F and ITU V.28 standards
  • Operates with 3-V to 5.5-V VCC supply
  • Always-active noninverting receiver output (ROUT2B)
  • Designed to transmit at a data rate up to 500 kbit/s
  • Low standby current: 1 µA typical
  • External capacitors: 4 × 0.1 µF
  • Accepts 5-V logic input with 3.3-V supply
  • Designed to Be interchangeable with maxim MAX3243E
  • Serial-Mouse Driveability
  • Auto-powerdown feature to disable driver outputs when no valid RS-232 signal is sensed
  • Package options include plastic small-outline (DW), shrink small-outline (DB), and thin shrink small-outline (PW) packages

The MAX3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge) protection on serial-port connection pins. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down.

The MAX3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge) protection on serial-port connection pins. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet MAX3243E 3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With ±15-kV IEC ESD Protection datasheet (Rev. E) PDF | HTML Oct 31, 2022
Application note RS-232 Glossary and Selection Guide PDF | HTML May 23, 2023

Design & development

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Simulation model

MAX3243E IBIS Model (Rev. A)

SLLM036 (482 KB) - IBIS model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SSOP (DB) 28 Ultra Librarian
SOIC (DW) 28 Ultra Librarian
VQFN (RHB) 32 Ultra Librarian
TSSOP (PW) 28 Ultra Librarian
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