DS96F172M/DS96F174C/DS96F174M EIA-485/EIA-422 Quad Differential Drivers General Description Features The DS96F172 and the DS96F174 are high speed quad differential line drivers designed to meet EIA-485 Standards. The DS96F172 and the DS96F174 offer improved performance due to the use of L-FAST bipolar technology. The use of LFAST technology allows the DS96F172 and DS96F174 to operate at higher speeds while minimizing power consumption. The DS96F172 and the DS96F174 have TRI-STATE ® outputs and are optimized for balanced multipoint data bus transmission at rates up to 15 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. The DS96F172 features an active high and active low Enable, common to all four drivers. The DS96F174 features separate active high Enables for each driver pair. n n n n n n n n n Logic Diagrams n n n n Meets EIA-485 and EIA-422 standards Monotonic differential output switching TRI-STATE outputs Designed for multipoint bus transmission Common mode output voltage range: −7.0V to +12V Operates from single +5.0V supply Reduced power consumption Thermal shutdown protection DS96F172 and DS96F174 are lead and function compatible with the SN75172/174 or the AM26LS31/MC3487 Military temperature range available Qualified for MIL-STD-883C Standard military drawings available (SMD) Available in DIP (J), LCC (E), and Flatpak (W) packages Function Tables (Each Driver) DS96F172 DS96F172 Input 00962514 Enable Outputs A E E Y H H X H L L H X L H H X L H L L X L L H X L H Z Z DS96F174 Z DS96F174 Input 00962515 Enable Outputs A E Y H H H Z L L H L H X L Z Z H = High Level L = Low Level X = Don’t Care Z = High Impedance (Off) TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS009625 www.national.com DS96F172M/DS96F174C/DS96F174M EIA-485/EIA-422 Quad Differential Drivers July 2000 DS96F172M/DS96F174C/DS96F174M Absolute Maximum Ratings COMMERCIAL(Note 2) Recommended Operating Conditions Specifications for the 883 version of this product are listed separately on the following pages. Storage Temperature Range (TSTG) Min Typ Max Units Supply Voltage (VCC) −65˚C to +175˚C Lead Temperature (Soldering, 60 sec.) DS96F174C 300˚C V +12.0 V Output Current HIGH (IOH) −60 mA Output Current LOW (IOL) 60 mA +70 ˚C Output Voltage (VOC) Maximum Package Power Dissipation (Note 1) at 25˚C Ceramic DIP (J) 4.75 5.0 5.25 −7.0 Common Mode 1500 mW Supply Voltage 7.0V Enable Input Voltage 5.5V Operating Temperature (TA) DS96F174C 0 Note 1: Derate “J” package 10 mW/˚C above 25˚C. Electrical Characteristics (Notes 3, 4) Over recommended supply voltage and operating temperature range, unless otherwise specified Symbol Parameter Conditions Min Typ Max Units (Note 2) VIH Input Voltage HIGH VIL Input Voltage LOW 2.0 0.8 TA = −55˚C to +125˚C 0.7 VOH Output Voltage HIGH IOH = −33 mA TA = 0˚C to +70˚C VOL Output Voltage LOW IOL = 33 mA TA = 0˚C to +70˚C VIC Input Clamp Voltage |VOD1| Differential Output Voltage |VOD2| Differential Output Voltage RL = 54Ω, Figure 1 3.0 V V II = −18 mA −1.5 V IO = 0 mA 6.0 V TA = −55˚C RL = 100Ω, Figure 1 1.2 2.0 VOD Differential Output Voltage Figure 2 TA = 0˚C to +70˚C ∆|VOD| Change in Magnitude of Differential RL = 54Ω or 100Ω, −40˚C to +125˚C Output Voltage (Note 5) Figure 1 −55˚C to +125˚C Common Mode Output Voltage (Note 6) Change in Magnitude of Common ∆|VOC| V 2.0 1.5 VOC V TA = 0˚C to +70˚C 2.0 V 2.3 1.0 V ± 0.2 ± 0.4 V RL = 54Ω or 100Ω, Figure 1 3.0 V RL = 54Ω or 100Ω, Figure 1 ± 0.2 V ± 50 ± 50 µA Mode Output Voltage (Note 5) IO Output Current with Power Off VCC = 0V, VO = −7.0V to +12V ± 20 IOZ High Impedance State Output Current IIH Input Current HIGH VI = 2.4V 20 µA IIL Input Current LOW VI = 0.4V −50 µA IOS Short Circuit Output Current VO = −7.0V −250 (Note 7) VO = 0V −150 VO = VCC 150 VO = +12V 250 ICC Supply Current (All Drivers) VO = −7.0V to +12V No Load ICCX www.national.com 2 Outputs Enabled 50 Outputs Disabled 30 µA mA mA Switching Characteristics VCC = 5.0V, TA = 25˚C Symbol Parameter tDD Differential Output Delay Time tTD Differential Output Transition Time tPLH Propagation Delay Time, Conditions RL = 60Ω, Figure 3 RL = 27Ω, Figure 4 Min Typ Max 15 20 Units ns 15 22 ns 12 16 ns 12 16 ns Low-to-High Level Output tPHL Propagation Delay Time, High-to-Low Level Output tZH Output Enable Time to High Level RL = 110Ω, FIgure 4 25 32 ns tZL Output Enable Time to Low Level RL = 110Ω, Figure 6 25 32 ns tHZ Output Disable Time from High Level RL = 110Ω, Figure 5 25 30 ns tLZ Output Disable Time from Low Level RL = 110Ω, Figure 6 20 25 ns tLZL Output Disable Time from Low Level Figure 6 300 RL = 60Ω 1.0 ns with Load Resistor to GND (Note 8) tSKEW Driver Output to Output 4.0 ns 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 DS96F174C. 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 are negative. All voltages are reference 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-422A and EIA-485 standards, 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. Note 8: For more information see Application Bulletin, contact Product Marketing. Order Number: DS96F174CJ DS96F174CN NS Package Number J16A or N16E 3 www.national.com DS96F172M/DS96F174C/DS96F174M COMMERCIAL DS96F172M/DS96F174C/DS96F174M MIL-STD-883C Absolute Maximum Ratings (Note 2) Recommended Operating Conditions For complete Military Specifications, refer to the appropriate SMD or MDS. Min Typ Storage Temperature Range (TSTG) −65˚C to +175˚C Lead Temperature (Soldering, 60 sec.) 300˚C DS96F172M/DS96F174M Maximum Package Power Dissipation (Note 9) at 25˚C Ceramic LCC (E) 2000 mW Ceramic DIP (J) 1800 mW Ceramic Flatpak (W) 1000 mW Supply Voltage 7.0V Enable Input Voltage 5.5V Max Units Supply Voltage (VCC) 5.50 V +12.0 V Output Current HIGH (IOH) −60 mA Output Current LOW (IOL) 60 mA Common Mode 4.50 5.0 −7.0 Output Voltage (VOC) Operating Temperature (TA) DS96F172M/DS96F174M −55 +125 Note 9: Above TA = 25˚C, derate “E” package 13.4, “J” package 12.5, “W” package 7.1 mW/˚C Electrical Characteristics (Notes 3, 4) Over recommended supply voltage and operating temperature range unless otherwise specified Symbol Parameter VIH Input Voltage HIGH VIL Input Voltage LOW Conditions Min Max 2.0 Units V TA = 25˚C 0.8 TA = −55˚C, or +125˚C 0.7 V VIC Input Clamp Voltage II = −18 mA −1.5 V |VOD1| Differential Output Voltage IO = 0 mA 6.0 V |VOD2| Differential Output Voltage RL = 54Ω, VCC = 4.5V TA = −55˚C 1.2 Figure 1 TA = 25˚C, or +125˚C 1.5 RL = 100Ω, VCC = 4.5V, Figure 1 ∆|VOD| V 2.0 ± 0.2 ± 0.4 V 3.0 V RL = 54Ω or 100Ω, VCC = 4.5V, Figure 1 ± 0.2 V ± 50 ± 50 µA Change in Magnitude of Differential RL = 54Ω or 100Ω, TA = 25˚C, or +125˚C Output Voltage (Note 5) VCC = 4.5V, Figure 1 TA = −55˚C VOC Common Mode Output Voltage (Note 6) RL = 54Ω or 100Ω, Figure 1 ∆|VOC| Change in Magnitude of Common V Mode Output Voltage (Note 5) IO Output Current with Power Off VCC = 0V, VO = −7.0V to +12V IOZ High Impedance State Output Current VO = −7.0V to +12V IIH Input Current HIGH VI = 2.4V 20 µA IIL Input Current LOW VI = 0.4V −50 µA IOS Short Circuit Output Current VO = −7.0V −250 (Note 7) VO = 0V −150 VO = VCC 150 VO = +12V ICC Supply Current (All Drivers) mA 250 No Load ICCX www.national.com µA 4 Outputs Enabled 50 Outputs Disabled 30 mA Switching Characteristics VCC = 5.0V Symbol Parameter Conditions TA = 55˚C TA = 125˚C Typ TA = 25˚C Max Max Max 15 22 30 30 Units tDD Differential Output Delay Time tTD Differential Output Transition Time Figure 3 15 22 40 40 ns tPLH Propagation Delay Time, RL = 27Ω, CL = 15 pF, 12 16 25 25 ns Low-to-High Level Output Figure 4 12 16 25 25 ns tPHL RL = 60Ω, CL = 15 pF, Propagation Delay Time, ns High-to-Low Level Output tZH Output Enable Time to High Level RL = 110Ω, Figure 5 25 32 40 40 ns tZL Output Enable Time to Low Level RL = 110Ω, Figure 6 25 35 100 100 ns tHZ Output Disable Time from High Level RL = 110Ω, Figure 5, 25 30 80 80 ns 25 40 40 ns Note 13 tLZ tLZL Output Disable Time from Low Level RL = 110Ω, Figure 6 20 Output Disable Time from Low Level Figure 6 300 RL = 60Ω 1.0 ns with Load Resistor to GND (Note 12) tSKEW Driver Output to Output SMD Numbers: DS96F172MJ/883 5962-9076501MEA DS96F174MJ/883 5962-9076502MEA 4.0 10 10 ns DS96F172ME/883, DS96F174ME/883 NS Package Number E20A DS96F172MW-MIL, DS96F174MW/883 NS Package Number W16A DS96F172ME/883 5962-9076501M2A DS96F174MW/883 5962-9076502MFA DS96F174ME/883 5962-9076502M2A For Complete Military Product Specifications, refer to the appropriate SMD or MDS. Order Number: DS96F172MJ/883, DS96F174MJ/883 NS Package Number J16A Parameter Measurement Information 00962513 00962503 FIGURE 2. Differential Output Voltage with Varying Common Mode Voltage FIGURE 1. Differential and Common Mode Output Voltage 00962505 00962504 FIGURE 3. Differential Output Delay and Transition Times 5 www.national.com DS96F172M/DS96F174C/DS96F174M MIL-STD-883C DS96F172M/DS96F174C/DS96F174M Parameter Measurement Information (Continued) 00962506 00962507 FIGURE 4. Propagation Delay Times 00962509 00962508 FIGURE 5. tZH and tHZ 00962511 00962510 FIGURE 6. tZL, tLZ, tLZL Note 10: The input pulse is supplied by a generator having the following characteristics: f = 1.0 MHz, duty cycle = 50%, tr ≤ 5.0 ns, tf ≤ 5.0 ns, ZO = 50Ω. Note 11: CL includes probe and jig capacitance. Note 12: DS96F172 with active high and active low Enables is shown. DS96F174 has active high Enable only. Note 13: To test the active low Enable E of DS96F172 ground E and apply an inverted waveform to E . DS96F174 has active high Enable only. Note 14: For more information see Application Bulletin, Contact Product Marketing. Note 15: Not tested for DS96F172MW-MIL device. www.national.com 6 DS96F172M/DS96F174C/DS96F174M Typical Application 00962512 The line length should be terminated at both ends in its characteristic impedance. Stub lengths off the main line should be kept as short as possible. Connection Diagrams 16-Lead Ceramic Dual-In-Line Package NS Package Number J16A DS96F174 DS96F172 00962501 00962502 Top View Top View 20-Lead Ceramic Leadless Chip Carrier NS Package Number E20A 00962518 00962519 NC = No connection Top View Top View 7 www.national.com DS96F172M/DS96F174C/DS96F174M Connection Diagrams (Continued) 16-Lead Ceramic Flatpak NS Package Number W16A 00962501 00962502 Top View Top View Order Numbers are located at the end of the respective Electrical Tables. www.national.com 8 DS96F172M/DS96F174C/DS96F174M Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Ceramic Leadless Chip Carrier (E) Order Number DS96F172ME/883, DS96F174ME/883 NS Package Number E20A 16-Lead Ceramic Dual-In-Line Package (J) Order Number DS96F172MJ/883, DS96F174CJ, DS96F174MJ/883 NS Package Number J16A 9 www.national.com DS96F172M/DS96F174C/DS96F174M Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Ceramic Flatpack (W) Order Number DS96F172MW/883, DS96F174MW/883 NS Package Number W16A Molded Dual-In-Line Package (N) Order Number DS96F174CN NS Package Number N16E www.national.com 10 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. 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