ADM489A

PRODUCTION

5 V, Slew-Rate Limited, Low Power, 250 kbps, Full Duplex EIA RS-485 Transceiver (with DE/RE)

Data Sheet (Rev. B) Product Selection Table

Part Models: 4
1ku List Price: Starting From $1.16

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Overview

Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E)
250 kbps data rate
Single 5 V ± 10% supply
−7 V to +12 V bus common-mode range

Connect up to 32 nodes on the bus
Reduced slew rate for low EM interference
Short-circuit protection
30 μA supply current

The ADM488A and ADM489A are low power, differential line transceivers suitable for communication on multipoint bus transmission lines. They are intended for balanced data transmission and comply with both RS-485 and RS-422 standards of the Electronics Industries Association (EIA). Both products contain a single differential line driver and a single differential line receiver, making them suitable for full-duplex data transfer. The ADM489A contains an additional receiver and driver enable control.

The input impedance is 12 kΩ, allowing 32 transceivers to be connected on the bus. The ADM488A/ADM489A operate from a single 5 V ± 10% power supply.

Excessive power dissipation that is caused by bus contention or output shorting is prevented by a thermal shutdown circuit. This feature forces the driver output into a high impedance state if, during fault conditions, a significant temperature increase is detected in the internal driver circuitry. The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).

The ADM488A/ADM489A are fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

The ADM488A/ADM489A are fully specified over the industrial temperature range and are available in SOIC and MSOP packages.

Applications

Low power RS-485 and RS-422 systems
DTE-DCE interface
Packet switching
Local area networks
Data concentration
Data multiplexers
Integrated services digital network (ISDN)

Part Models: 4
1ku List Price: Starting From $1.16

Documentation

Data Sheet 1

ADM488A/ADM489A: Full-Duplex, Low Power,Slew Rate Limited, EIA RS-485 Transceivers Data Sheet (Rev.B) 10/01/2009

Application Note 1

AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format 02/07/2014

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADM489ABRMZ	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM489ABRMZ-REEL7	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM489ABRZ	14-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM489ABRZ-REEL7	14-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jan 26, 2016 - 15_0176 Assembly Transfer of Select 8/10L MSOP Products to Amkor Philippines
		PCN15_0176_Form Material_Report Detailed Change Description Qualification Results Summary Qualification Results Summary
ADM489ABRMZ	PRODUCTION
ADM489ABRMZ-REEL7	PRODUCTION
May 15, 2012 - 10_0006 Halogen Free Material Change for mini SOIC Products
		PCN10_0006_Form Material_Report Qualification Report Summary Qualification Report Summary
ADM489ABRMZ	PRODUCTION
ADM489ABRMZ-REEL7	PRODUCTION
Mar 25, 2021 - 21_0080 Amkor Philippines as an Alternate Site for SOICN
		PCN21_0080_Form Material_Report Qualification Results Summary Other
ADM489ABRZ	PRODUCTION
ADM489ABRZ-REEL7	PRODUCTION
Oct 5, 2010 - 10_0146 Halogen Free Material Change for 14/16L SOIC_N Products
		PCN10_0146_Form Material_Report AEC-Q100 Reliability Report ADI0012 Reliability Report
ADM489ABRZ	PRODUCTION
ADM489ABRZ-REEL7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Evaluation Kits

Standard RS-485 Full-Duplex (14-lead SOIC) Evaluation Board, EVAL-RS485FDEBZ

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Product Details

The EVAL-RS485FDEBZ allows quick and easy evaluation of full-duplex RS-485 transceivers with standard 14-lead SOIC footprints. The evaluation board allows interfacing via screw terminal block to digital I/O for driver input (DI), receiver output (RO), driver enable (DE) and receiver output (RO). Bus signals A, B, Y and Z (full-duplex bus) can be connected to a bus screw terminal block. Termination resistors are fitted across A and B, as well as Y and Z. These can be connected in half-duplex configuration (A to Y, B to Z), in order to evaluate the RS-485 driver. Footprints are provided for pull-up and pull-down (biasing resistors) on the receiver inputs in order to provide the option to evaluate an RS-485 receiver with this configuration.

Devices for evaluation on the board must be ordered separately.

Resources

UG-543:Evaluation Boards for Full-Duplex and Half-Duplex RS-485 Transceivers (Rev.A)
4/19/2013

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