Features • Meets TIA/EIA RS-485 multipoint standard • Guaranteed full load output voltage (V OD3) • Low quiescent current: 200 µA typ • -7V to +12V common-mode input voltage range • TRI-STATE outputs on driver and receiver • AC performance: • Driver transition time: 25 ns typ • Driver propagation delay: 40 ns typ • Driver skew: 1 ns typ • Receiver propagation delay: 200 ns typ • Receiver skew: 20 ns typ • Half-duplex flow through pinout • Operates from a single 5V supply • Allows up to 32 transceivers on the bus • Current-limiting and thermal shutdown for driver overload protection • Industrial temperature range operation • Pin and functional compatible with MAX485 and LTC485 Description The DS485 is a low-power transceiver for RS-485 and RS-422 communication. The device contains one driver and one receiver. The drivers slew rate allows for operation up to 2.5 Mbps (see Applications Information section). The transceiver draws 200 µA of supply current when unloaded or fully loaded with the driver disabled and operates from a single +5V supply. The driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into TRI-STATE® (High Impedance state) under fault conditions. The driver guarantees a minimum of 1.5V differential output voltage with maximum loading across the common mode range (VOD3). The receiver has a failsafe feature that guarantees a logic-high output if the input is open circuit. The DS485 is available in surface mount and DIP packages and is characterized for Industrial and Commercial temperature range operation.

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Datasheet

Title		Size	Date	Other Language
	DS485 Low Power RS-485/RS-422 Multipoint Transceiver	550 Kbytes	19-Nov-04	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1399: Application Note 1399 Enabling Redundancy in Multi-Gigabit Links with DS40MB200 Mux/Buffer	1440 Kbytes	17-Oct-05	日本語 中文
	AN-1398: Application Note 1398 Printed Circuit Board Design Techniques for DS40MB200	1007 Kbytes	21-Oct-05	日本語 中文
	AN-1389: Application Note 1389 Setting Pre-Emphasis Level for DS40MB200 Dual 4Gb/s Mux/Buffer	1646 Kbytes	21-Oct-05	日本語 中文

More Application Notes

Title		Size	Date	Other Language
	AN-514: Application Note 514 Timing Analysis of Synchronous and Asynchronous Buses	153 Kbytes	2-Mar-99	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
DS485M/NOPB RoHS	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 3721 DIGIKEY Worldwide 1546 FARNELL Europe and Asia 2307 FUTURE Worldwide 37 RS COMPONENTS Worldwide 45	$0.90 each at 1K+ pcs	rail of 95
DS485TM/NOPB DS485TM RoHS	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1235 DIGIKEY Worldwide 214 FUTURE Worldwide 1100 NEWARK Americas 259 RS COMPONENTS Worldwide 10	$0.91 each at 1K+ pcs	rail of 95
DS485MX/NOPB DS485MX RoHS	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.90 each at 1K+ pcs	reel of 2500
DS485TMX/NOPB DS485TMX RoHS	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 2500 DIGIKEY Worldwide 0 FUTURE Worldwide 1100	$0.91 each at 1K+ pcs	reel of 2500
DS485N/NOPB RoHS	MDIP	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 513 FARNELL Europe and Asia 156 FUTURE Worldwide 1100 RS COMPONENTS Worldwide 15	$1.06 each at 1K+ pcs	rail of 40

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
DS485TN	LTC485	LINEAR TECHNOLOGY	16 Nov 2008

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DS485M	LMDMOS	0	17710	0	0	2470000	2	700869244
DS485MX	LMDMOS	0	17710	0	0	2470000	2	700869244
DS485N	LMDMOS	0	17710	0	0	2470000	2	700869244
DS485TM	LMDMOS	0	17710	0	0	2470000	2	700869244
DS485TMX	LMDMOS	0	17710	0	0	2470000	2	700869244
DS485TN	LMDMOS	0	17710	0	0	2470000	2	700869244

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
DS485TN	LTC485	LINEAR TECHNOLOGY	16 Nov 2008