Features • 100% RS-485 compliant • Guaranteed RS-485 device interoperation • Low power CMOS design: ICC 500 µA max • Built-in power up/down glitch-free circuitry • Permits live transceiver insertion/displacement • DIP and SOIC packages available • Industrial temperature range: -40°C to +85°C • On-board thermal shutdown circuitry • Prevents damage to the device in the event of excessive power dissipation • Wide common mode range: -7V to +12V • Receiver open input fail-safe • ¼ unit load (DS36C278): >=128 nodes • ½ unit load (DS36C278T): >=64 nodes • ESD (human body model): >=2 kV • Drop in replacement for: • LTC485, MAX485, DS75176, DS3695 Description The DS36C278 is a low power differential bus/line transceiver designed to meet the requirements of RS-485 standard for multipoint data transmission. In addition it is compatible with TIA/EIA-422-B. The CMOS design offers significant power savings over its bipolar and ALS counterparts without sacrificing ruggedness against ESD damage. The device is ideal for use in battery powered or power conscious applications. ICC is specified at 500 µA maximum. The driver and receiver outputs feature TRI-STATE® capability. The driver outputs operate over the entire common mode range of -7V to +12V. Bus contention or fault situations that cause excessive power dissipation within the device are handled by a thermal shutdown circuit, which forces the driver outputs into the high impedance state. The receiver incorporates a fail safe circuit which guarantees a high output state when the inputs are left open. The DS36C278T is fully specified over the industrial temperature range (-40°C to +85°C).

MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Connection Diagram click for larger image

Datasheet

Title		Size	Date	Other Language
	DS36C278 Low Power Multipoint EIA-RS-485 Transceiver	583 Kbytes	11-Nov-04	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1057: Application Note 1057 Ten Ways to Bulletproof RS-485 Interfaces	155 Kbytes	2-Oct-02

More Application Notes

Title		Size	Date	Other Language
	AN-214: Application Note 214 Transmission Line Drivers and Receivers for TIA/EIA Standards RS‐422 and RS‐423	338 Kbytes	4-Oct-04
	AN-967: Application Note 967 LocalTalk Physical Layer Alternatives	58 Kbytes	5-Oct-98
	AN-847: Application Note 847 FAILSAFE Biasing of Differential Buses	89 Kbytes	5-Oct-98	日本語
	AN-454: Application Note 454 Automotive Multiplex Wiring	107 Kbytes	5-Oct-98

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
DS36C278M/NOPB RoHS	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 53 FUTURE Worldwide 1100 NEWARK Americas 85	$1.12 each at 1K+ pcs	rail of 95
DS36C278TM/NOPB DS36C278TM RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 1640 AVNET-EM Worldwide 75 DIGIKEY Worldwide 214 FARNELL Europe and Asia 1008 FUTURE Worldwide 155 NEWARK Americas 211 TAYLOR Americas 1210	$0.95 each at 1K+ pcs	rail of 95
DS36C278MX/NOPB RoHS	SOIC NARROW	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0 FUTURE Worldwide 1100	$1.12 each at 1K+ pcs	reel of 2500
DS36C278TMX/NOPB DS36C278TMX RoHS	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 2500 DIGIKEY Worldwide 0 FUTURE Worldwide 1100	$0.95 each at 1K+ pcs	reel of 2500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
DS36C278N	SP485	SIPEX CORP	03 Mar 2006
DS36C278TN	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)
DS36C278M	LMDMOS	0	17710	0	0	2470000	2	700869244
DS36C278MX	LMDMOS	0	17710	0	0	2470000	2	700869244
DS36C278TM	LMDMOS	0	17710	0	0	2470000	2	700869244
DS36C278TMX	LMDMOS	0	17710	0	0	2470000	2	700869244
DS36C278TN	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
DS36C278N	SP485	SIPEX CORP	03 Mar 2006
DS36C278TN	LTC485	LINEAR TECHNOLOGY	16 Nov 2008