Instruction/ maintenance manual of the product DS36C278 National
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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.
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.
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.
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 .
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.
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.
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.
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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 .
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 Packa.
An important point after buying a device National DS36C278 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought National DS36C278 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data National DS36C278 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, National DS36C278 you will learn all the available features of the product, as well as information on its operation. The information that you get National DS36C278 will certainly help you make a decision on the purchase.
If you already are a holder of National DS36C278, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime National DS36C278.
However, one of the most important roles played by the user manual is to help in solving problems with National DS36C278. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device National DS36C278 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
