Tl/f/12040 ds36c278 low power multipoint eia-rs-485 transceiver december 1995 ds36c278 low power multipoint eia-rs-485 transceiver general description the ds36c278 is a low power differential bus/line trans- ceiver designed to meet the requirements of rs-485 stan- dard for multipoint data transmissi...
Absolute maximum ratings (note 1) if military/aerospace specified devices are required, please contact the national semiconductor sales office/distributors for availability and specifications. Supply voltage (v cc ) a 12v input voltage (de, re*, & di) b 0.5v to (v cc a 0.5v) common mode (v cm ) driv...
Electrical characteristics (continued) over supply voltage and operating temperature ranges, unless otherwise specified (notes 2 and 3) symbol parameter conditions reference min typ max units i in line input current other input e 0v, ds36c278 v in e a 12v 0 0.19 0.25 ma de e v il , re* e v il , (not...
Switching characteristics (continued) over supply voltage and operating temperature ranges, unless otherwise specified (notes 3 and 8) symbol parameter conditions reference min typ max units receiver characteristics t phl propagation delay c l e 15 pf figures 12, 13 30 210 400 ns high to low t plh p...
Parameter measurement information (continued) tl/f/12040 – 6 figure 6. Driver differential propagation delays and differential rise and fall times tl/f/12040 – 7 figure 7. Tri-state test circuit (t pzh , t phz ) tl/f/12040 – 8 figure 8. Tri-state waveforms (t pzh , t phz ) tl/f/12040 – 9 figure 9. T...
Parameter measurement information (continued) tl/f/12040 – 13 figure 13. Receiver differential propagation delay waveforms tl/f/12040 – 14 figure 14. Receiver tri-state test circuit tl/f/12040 – 15 figure 15. Receiver enable and disable waveforms (t plz , t pzl ) tl/f/12040 – 16 figure 16. Receiver ...
Typical application information tl/f/12040 – 17 figure 17. Typical rs-485 bus interface table i. Device pin descriptions pin no. Name description 1 ro receiver output: when re (receiver enable) is low, the receiver is enabled (on), if do/ri t do*/ri* by 200 mv, ro will be high. If do/ri s do*/ri* by...
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Physical dimensions inches (millimeters) 8-lead (0.150 × wide) molded small outline package, jedec order number ds36c278tm, ds36c278m ns package number m08a http://www.National.Com 9.
Ds36c278 low power multipoint eia-rs-485 transceiver physical dimensions inches (millimeters) (continued) 8-lead (0.300 × wide) molded dual-in-line package order number ds36c278tn, ds36c278n ns package number n08e life support policy national’s products are not authorized for use as critical compone...