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Manual National DS36C278

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Summary
  • National DS36C278 - page 1

    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 transmission. In addition it is com- patible with TIA/EIA-42 ...

  • National DS36C278 - page 2

    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 ) Driver Output/Receiver Input g 15V Input Voltage ...

  • National DS36C278 - page 3

    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 ea 12V 0 0.19 0.25 mA DE e V IL ,R E * e V IL , (Note 7) V IN eb 7V 0 b 0.1 b 0.2 mA V CC e 4.75 to 5. ...

  • National DS36C278 - page 4

    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 Propagation Delay 30 190 400 ns Low to High t SK Sk ...

  • National DS36C278 - page 5

    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. TRI-STATE Test Circuit (t PZL ,t PLZ ) TL/F/1 ...

  • National DS36C278 - page 6

    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 Enable and Disable Waveforms (t PHZ ,t PZH ...

  • National DS36C278 - page 7

    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 200 mV, RO will be LOW. Additionally RO w ...

  • National DS36C278 - page 8

    http:/ /www .national.com 8 ...

  • National DS36C278 - page 9

    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 ...

  • National DS36C278 - page 10

    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 COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT ...

Manufacturer National Category Home Security System

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All of them are important, but the most important information from the point of view of use of the device are in the user manual National DS36C278.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals National DS36C278, service manual, brief instructions and user manuals National DS36C278. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product National DS36C278.

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A complete manual for the device National DS36C278, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use National DS36C278 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of National DS36C278.

A complete National manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual National DS36C278 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the National DS36C278, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the National DS36C278, that we can find in the current document
3. Tips how to use the basic functions of the device National DS36C278 - which should help us in our first steps of using National DS36C278
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with National DS36C278
5. FAQ - Frequently Asked Questions
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