|Category||Communication => Transeivers|
|Description||Rs-485/rs-422 Quad Differential Line Drivers|
|Company||National Semiconductor Corporation|
|Datasheet||Download DS96172 datasheet
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 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 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 DS96175, DS96176 AND DS96177.Features
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: 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 respectivelyTRI-STATE is a registered trademark of National Semiconductor Corporation.
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 to +70°C
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 Units mA °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 VO = VCC = 12V ICC Supply Current (All Drivers) No Load Outputs Enabled Output Disabled = 54, Figure µA mA IOH -20 mA IOL = 54, Figure = 100, Figure or 100, Figure Conditions Min 2 0.8 Typ Max Units
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 Enable Time to High Level Output Enable Time to Low LevelOutput 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 to +70°C range for the DS96172/DS96174. All typicals are given for VCC = 5V and = 25°C. Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are referenced to ground unless otherwise specified. Note 5: |VOD| and |VOC| are the changes in magnitude of VOD and VOC respectively, that occur when the input is changed from a high level to a low level. Note 6: In EIA Standards RS-422A and RS-485, VOC, which is the average of the two output voltages with respect to ground, is called output offset voltage, VOS. Note 7: Only one output at a time should be shorted.FIGURE 1. Differential and Common Mode Output Voltage
FIGURE 2. Differential Output Delay and Transition Times
|Some Part number from the same manufacture National Semiconductor Corporation|
|DS96172CN RS-485/RS-422 Quad Differential Line Drivers|
|DS96173 DS96173 - RS-485/RS-422 Quad Differential Line Receivers, Package: Mdip, Pin Nb=16|
|DS96174 DS96174 - RS-485/RS-422 Quad Differential Line Drivers, Package: Mdip, Pin Nb=16|
|DS96175 DS96173 - RS-485/RS-422 Quad Differential Line Receivers, Package: Mdip, Pin Nb=16|
|DS96176 DS96176 - RS-485/RS-422 Differential Bus Transceiver, Package: Mdip, Pin Nb=8|
|DS96177 Rs-485/rs-422 Differential Bus Repeater|
|DS96177CN RS-485/RS-422 Differential Bus Repeater|
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|DS9627 DS9627 - Dual Line Receiver, Package: Cerdip, Pin Nb=16|
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|DS9636A DS9636A - RS-423 Dual Programmable Slew Rate Line Driver, Package: Cerdip, Pin Nb=8|
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|DS9637ACMX DS9637A - Dual Differential Line Receiver, Package: Soic Narrow, Pin Nb=8|
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|DS9638MJ/883 Rs-422 Dual High Speed Differential Line Driver|
|DS9639A Dual Differential Line Receiver|
|DS96F172C Eia-485/eia-422 Quad Differential Drivers|
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