DS485 - Low-Power RS-485/RS-422 Multipoint Transceiver
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

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

General Description


The DS485 is a low-power transceiver for RS-485 and RS-422 communication. More...


 

ParametersValues
Function Transceiver
Channels 1 Channels
Max Data Rate 2.5 Mbps
SupplyVoltage 5 Volt
Process CMOS
Special Features Low Power
Temperature Min -40 deg C
Temperature Max 85 deg C
JTAG1149.1 No
Drivers 1
Receivers 1

Connection Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
DS485 Low Power RS-485/RS-422 Multipoint Transceiver 550
Kbytes
19-Nov-04 Download
DS485 Low Power RS-485/RS-422 Multipoint Transceiver (Japanese)
267 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
DS485MSOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.90rail
of
95
NSZXTT
DS485
M
6 weeks3000
DS485TMSOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.91rail
of
95
NSZXTT
DS485
TM
6 weeks1000
DS485MXSOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
 
Buy Now
1K+$0.90reel
of
2500
NSZXTT
DS485
M
6 weeks10000
DS485TMXSOIC NARROW8NOPB
STD
1
1
260
235
RoHS Download Full productionN/A
 
Buy Now
1K+$0.91reel
of
2500
NSZXTT
DS485
TM
6 weeks7500
DS485NMDIP8NOPB1NARoHS Download Full productionN/A
 
Buy Now
1K+$1.06rail
of
40
NSUZXYTTE#
DS485
N
16 weeks7500

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
DS485TN
LTC485
LINEAR TECHNOLOGY
16 Nov 2008

General 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.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
DS485MLMDMOS0177100024700002700869244
DS485MXLMDMOS0177100024700002700869244
DS485NLMDMOS0177100024700002700869244
DS485TMLMDMOS0177100024700002700869244
DS485TMXLMDMOS0177100024700002700869244
DS485TNLMDMOS0177100024700002700869244

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.


[Information as of 8-Nov-2009]