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DS96172 Dataheets PDF



Part Number DS96172
Manufacturers National Semiconductor
Logo National Semiconductor
Description RS-485/RS-422 Quad Differential Line Drivers
Datasheet DS96172 DatasheetDS96172 Datasheet (PDF)

DS96172/DS96174 RS-485/RS-422 Quad Differential Line Drivers June 1998 DS96172/DS96174 RS-485/RS-422 Quad Differential Line Drivers General Description The DS96172 and DS96174 are high speed quad differential line drivers designed to meet EIA Standard RS-485. The devices have TRI-STATE ® outputs and are optimized for balanced multipoint data bus transmission at rates up to 10 Mbps. The drivers have wide positive and negative common mode range for multipoint applications in noisy environments. .

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DS96172/DS96174 RS-485/RS-422 Quad Differential Line Drivers June 1998 DS96172/DS96174 RS-485/RS-422 Quad Differential Line Drivers General Description The DS96172 and DS96174 are high speed quad differential line drivers designed to meet EIA Standard RS-485. The devices have TRI-STATE ® outputs and are optimized for balanced multipoint data bus transmission at rates up to 10 Mbps. The drivers have wide positive and negative common mode range for multipoint applications in noisy environments. Positive and negative current-limiting is provided which protects the drivers from line fault conditions over a +12V to −7.0V common mode range. A thermal shutdown feature is also provided and occurs at junction temperature of approximately 160˚C. The DS96172 features an active high and active low Enable, common to all four drivers. The DS96174 features separate active high Enables for each driver pair. Compatible RS-485 receivers, transceivers, and repeaters are also offered to provide optimum bus performance. The respective device types are DS96173, DS96175, DS96176 AND DS96177. Features n n n n n n n n n Meets EIA Standard RS-485 and RS-422A Monotonic differential output switching Transmission rate to 10 Mbs TRI-STATE outputs Designed for multipoint bus transmission Common mode output voltage range: −7V to +12V Operates from single +5V supply Thermal shutdown protection DS96172/DS96174 are lead and function compatible with the SN75172/75174 or the AM26LS31/MC3487 respectively Connection Diagrams 16-Lead DIP DS96172 16-Lead DIP DS96174 DS009626-1 DS009626-2 Top View Order Number DS96172CN or DS96174CN See NS Package Number N16E Top View TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1998 National Semiconductor Corporation DS009626 www.national.com Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Molded DIP Operating Temperature Range Lead Temperature Molded DIP (soldering, 10 sec.) Supply Voltage Enable Input Voltage Maximum Power Dissipation (Note 1) −65˚C to +150˚C 0˚C to +70˚C N-Molded Package 1.98W Recommended Operating Conditions Supply Voltage (VCC) Common Mode Output Voltage (VOC) Output Current HIGH (IOH) Output Current LOW (IOL) Operating Temperature (TA) Min 4.75 −7 Typ 5 Max 5.25 +12 −60 60 70 Units V V mA mA ˚C 265˚C 7V 5.5V 25˚C 0 25 Note 1: Derate molded DIP package 16mW/˚C above 25˚C. Electrical Characteristics (Notes 3, 4) over recommended temperature and supply voltage ranges, unless otherwise specified Symbol VIH VIL VOH VOL VIC |VOD1| |VOD2| ∆|VOD| VOC ∆|VOC| IO IOZ IIH IIL IOS Parameter Input Voltage HIGH Input Voltage LOW Output Voltage HIGH Output Voltage LOW Input Clamp Voltage Differential Output Voltage Differential Output Voltage Change in Magnitude of Differential Output Voltage (Note 5) Common Mode Output Voltage (Note 6) Change in Magnitude of Common Mode Output Voltage (Note 5) Output Current with Power Off High Impedance State Output Current Input Current HIGH Input Current LOW Short Circuit Output Current (Note 7) VCC = 0V, VO = −7.0V to 12V VO = −7.0V to 12V VI = 2.7V VI = 0.5V VO = −7.0V VO = 0V VO = VCC VO = 12V ICC Supply Current (All Drivers) No Load Outputs Enabled Output Disabled 50 50 RL = 54Ω, Figure 1 3 V V µA µA µA µA mA IOH = −20 mA IOL = 20 mA II = −18 mA IO = 0 mA RL = 54Ω, Figure 1 RL = 100Ω, Figure 1 RL = 54Ω or 100Ω, Figure 1 1.5 2 2 2.3 3.1 0.8 −1.5 6 Conditions Min 2 0.8 Typ Max Units V V V V V V V V ± 0.2 V ± 0.2 ± 100 ± 200 20 −100 −250 −150 150 250 70 60 ± 50 mA Switching Characteristics VCC = 5V, TA = 25˚C Symbol tDD tTD tPLH tPHL tPZH tPZL www.national.com Parameter Differential Output Delay Time Differential Output Transition Time Propagation Delay Time, Low-to-High Level Output Propagation Delay Time, High-to-Low Level Output Output Enable Time to High Level Output Enable Time to Low Level Conditions RL = 60Ω, Figure 2 RL = 27Ω, Figure 3 Min Typ 15 15 12 12 Max 25 25 20 20 45 45 Units ns ns ns ns ns ns RL = 110Ω, Figure 4 RL = 110Ω, Figure 5 2 30 30 Switching Characteristics VCC = 5V, TA = 25˚C Symbol tPHZ tPLZ Parameter (Continued) Conditions RL = 110Ω, Figure 4 RL = 110Ω, Figure 5 Min Typ 25 30 Max 35 45 Units ns ns Output Disable Time from High Level Output Disable Time from Low Level Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual device operation. Note 3: Unless otherwise specified min/max limits apply across the 0˚C to +70˚C range for the DS96172/DS96174. All typicals are given for VCC = 5V and TA = 25˚C. Note 4: All currents into the device pins are positive; all currents out of the device pins ar.


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