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.

	Connection Diagram click for larger image

Datasheets

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

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS485M/NOPB DS485M RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 515 DIGI-KEY Worldwide 1615 FARNELL Europe and Asia 929 MOUSER Worldwide 1138 NEWARK Americas 47 RS COMPONENTS Worldwide 45 TAYLOR Americas 5824	$0.79 each at 1K+ pcs	rail of 95
DS485MX/NOPB DS485MX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 2500 DIGI-KEY Worldwide 0 MOUSER Worldwide 2500	$0.79 each at 1K+ pcs	reel of 2500
DS485N/NOPB DS485N RoHS Status	MDIP	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 210 DIGI-KEY Worldwide 13326 FARNELL Europe and Asia 1052 MOUSER Worldwide 237 RS COMPONENTS Worldwide 15	$0.92 each at 1K+ pcs	rail of 40
DS485TM/NOPB DS485TM RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1425 AVNET-EM Worldwide 421 DIGI-KEY Worldwide 326 MOUSER Worldwide 419 NEWARK Americas 94 RS COMPONENTS Worldwide 10 TAYLOR Americas 1425	$0.79 each at 1K+ pcs	rail of 95
DS485TMX/NOPB DS485TMX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 10000 AVNET-EM Worldwide 15890 DIGI-KEY Worldwide 0 MOUSER Worldwide 2370 TAYLOR Americas 10000	$0.79 each at 1K+ pcs	reel of 2500

Obsolete Versions

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

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for DS485.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for DS485 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
DS485M/NOPB DS485M	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT DS485 M
DS485MX/NOPB DS485MX	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT DS485 M
DS485N/NOPB DS485N	508.252 510.002	MDIP	8	1 1	NA NA	Detail	Download	N/A	NSUZXYTTE# DS485 N
DS485TM/NOPB DS485TM	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT DS485 TM
DS485TMX/NOPB DS485TMX	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT DS485 TM

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for DS485.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for DS485 is located at RoHS Status.

CAD Symbols and Models Download DS485 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DS485M	LMDMOS	0	18295	0	0	2650000	2	751944735
DS485MX	LMDMOS	0	18295	0	0	2650000	2	751944735
DS485N	LMDMOS	0	18295	0	0	2650000	2	751944735
DS485TM	LMDMOS	0	18295	0	0	2650000	2	751944735
DS485TMX	LMDMOS	0	18295	0	0	2650000	2	751944735

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.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for DS485.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for DS485 is located at RoHS Status.

Obsolete Versions

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