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MAX13487E, MAX13488E
Half-Duplex RS-485/RS-422-Compatible Transceiver with AutoDirection Control

Eliminate an Isolated Control Channel with AutoDirection


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 308kB)
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The MAX13487E/MAX13488E +5V, half-duplex, ±15kV ESD-protected RS-485/RS-422-compatible transceivers feature one driver and one receiver. The MAX13487E/MAX13488E include a hot-swap capability to eliminate false transitions on the bus during power-up or live insertion.

The MAX13487E/MAX13488E feature Maxim's proprietary AutoDirection control. This architecture makes the devices ideal for applications, such as isolated RS-485 ports, where the driver input is used in conjunction with the driver-enable signal to drive the differential bus. The MAX13487E features reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free transmission up to 500kbps. The MAX13488E driver slew rate is not limited, allowing transmit speeds up to 16Mbps.

The MAX13487E/MAX13488E feature a 1/4-unit load receiver input impedance, allowing up to 128 transceivers on the bus. These devices are intended for half-duplex communications. All driver outputs are protected to ±15kV ESD using the Human Body Model. The MAX13487E/MAX13488E are available in an 8-pin SO package. The devices operate over the extended -40°C to +85°C temperature range.

An evaluation kit is available:  MAX13487EEVKIT  

Key Features   Applications/Uses
  • +5V Operation
  • AutoDirection Enables Driver Automatically on Transmission
  • Hot-Swappable for Telecom Applications
  • Enhanced Slew-Rate Limiting Facilitates Error-Free Data Transmission (MAX13487E)
  • High-Speed Version (MAX13488E) Allows for Transmission Speeds Up to 16Mbps
  • Extended ESD Protection for RS-485 I/O Pins ±15kV Human Body Model
  • 1/4-Unit Load, Allowing Up to 128 Transceivers on the Bus
  • 8-Pin SO Package

 
  • Automated HVAC Systems
  • Industrial Controls
  • Industrial Motor Drives
  • Isolated RS-485 Interfaces
  • Utility Meters

Key Specifications:  RS-422/485 Line Driver/Receivers
Part Number Tx/Rx Duplex VSUPPLY
(V)
ICC
(mA)
Data Rate
(kbps)
ESD Protect.
(±kV)
Tx EN Rx EN ICC (Shutdn.)
(µA)
Rx/Tx on Bus Package/Pins Price
typ min typ See Notes
MAX13487E  1Tx + 1Rx Half 5 4.5 500 15 No Yes 10 128
SOIC(N)/8
$1.25 @1k
MAX13488E  16000
SOIC(N)/8
$1.25 @1k
See All RS-422/485 Line Driver/Receivers (159)

Diagram
MAX13487E, MAX13488E: Functional Diagram
Functional Diagram

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    Document Ref.: 19-0740; Rev 0; 2007-02-09
    This page last modified: 2009-10-22


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