DS75176B/DS75176BT Multipoint RS-485/RS-422 Transceivers General Description Features The DS75176B is a high speed differential TRI-STATE (R) bus/line transceiver designed to meet the requirements of EIA standard RS485 with extended common mode range (+12V to -7V), for multipoint data transmission. In addition, it is compatible with RS-422. The driver and receiver outputs feature TRI-STATE capability, for the driver outputs over the entire common mode range of +12V to -7V. Bus contention or fault situations that cause excessive power dissipation within the device are handled by a thermal shutdown circuit, which forces the driver outputs into the high impedance state. DC specifications are guaranteed over the 0 to 70C temperature and 4.75V to 5.25V supply voltage range. n Meets EIA standard RS485 for multipoint bus transmission and is compatible with RS-422. n Small Outline (SO) Package option available for minimum board space. n 22 ns driver propagation delays. n Single +5V supply. n -7V to +12V bus common mode range permits 7V ground difference between devices on the bus. n Thermal shutdown protection. n High impedance to bus with driver in TRI-STATE or with power off, over the entire common mode range allows the unused devices on the bus to be powered down. n Pin out compatible with DS3695/A and SN75176A/B. n Combined impedance of a driver output and receiver input is less than one RS485 unit load, allowing up to 32 transceivers on the bus. n 70 mV typical receiver hysteresis. Connection and Logic Diagram DS008759-1 Top View Order Number DS75176BN, DS75176BTN, DS75176BM or DS75176BTM See NS Package Number N08E or M08A TRI-STATE (R) is a registered trademark of National Semiconductor Corp. (c) 1999 National Semiconductor Corporation DS008759 www.national.com DS75176B/DS75176BT Multipoint RS-485/RS-422 Transceivers July 1998 Absolute Maximum Ratings (Note 1) Recommended Operating Conditions If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage, VCC Control Input Voltages Driver Input Voltage Driver Output Voltages Receiver Input Voltages (DS75176B) Receiver Output Voltage Continuous Power Dissipation @ 25C for M Package for N Package Storage Temperature Range Lead Temperature (Soldering, 4 seconds) Supply Voltage, VCC Voltage at Any Bus Terminal (Separate or Common Mode) Operating Free Air Temperature TA DS75176B DS75176BT Differential Input Voltage, VID (Note 6) 7V 7V 7V +15V/ -10V +15V/ -10V 5.5V 675 mW (Note 5) 900 mW (Note 4) -65C to +150C Min 4.75 -7 Max 5.25 +12 Units V V 0 -40 +70 +85 C C -12 +12 V 260C Electrical Characteristics (Notes 2, 3) 0C TA 70C, 4.75V < VCC < 5.25V unless otherwise specified Symbol VOD1 Parameter Conditions Differential Driver Output Min Typ IO = 0 Max Units 5 V Voltage (Unloaded) VOD2 (Figure 1) Differential Driver Output R = 50; (RS-422) (Note 7) Voltage (with Load) VOD R = 27; (RS-485) 2 V 1.5 V Change in Magnitude of Driver Differential Output Voltage For 0.2 V 3.0 V 0.2 V Complementary Output States VOC (Figure 1) Driver Common Mode Output R = 27 Voltage |VOC| Change in Magnitude of Driver Common Mode Output Voltage For Complementary Output States VIH Input High Voltage VIL Input Low Voltage DI, DE, RE , E 2 V 0.8 VCL Input Clamp Voltage IIN = -18 mA -1.5 IIL Input Low Current VIL = 0.4V -200 IIH Input High Current VIH = 2.4V 20 A IIN Input VCC = 0V or 5.25V VIN = 12V +1.0 mA Current DE = 0V VIN = -7V -0.8 mA Differential Input Threshold -7V VCM + 12V +0.2 V VTH DO/RI, DO/RI -0.2 A Voltage for Receiver VTH Receiver Input Hysteresis VCM = 0V VOH Receiver Output High Voltage IOH = -400 A VOL Output Low Voltage IOL = 16 mA (Note 7) 0.5 V 20 A 55 mA IOZR RO 70 mV 2.7 V OFF-State (High Impedance) VCC = Max Output Current at Receiver 0.4V VO 2.4V RIN Receiver Input Resistance -7V VCM +12V ICC Supply Current No Load Driver Outputs Enabled (Note 7) Driver Outputs Disabled 35 mA IOSD Driver Short-Circuit VO = -7V (Note 7) -250 mA Output Current VO = +12V (Note 7) +250 mA www.national.com 2 12 k Electrical Characteristics (Notes 2, 3) (Continued) 0C TA 70C, 4.75V < VCC < 5.25V unless otherwise specified Symbol IOSR Parameter Receiver Short-Circuit Conditions VO = 0V Min Typ Max Units -15 -85 mA Output Current Note 1: "Absolute Maximum Ratings" are those beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The tables of "Electrical Characteristics" provide conditions for actual device operation. Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. Note 3: All typicals are given for VCC = 5V and TA = 25C. Note 4: Derate linearly at 5.56 mW/C to 650 mW at 70C. Note 5: Derate linearly 6.11 mW/C to 400 mW at 70C. Note 6: Differential - Input/Output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B. Note 7: All worst case parameters for which note 7 is applied, must be increased by 10% for DS75176BT. The other parameters remain valid for -40C < TA < +85C. Switching Characteristics VCC = 5.0V, TA = 25C Symbol Typ Max Units tPLH Driver Input to Output Parameter RLDIFF = 60 Conditions Min 12 22 ns tPHL Driver Input to Output CL1 = CL2 = 100 pF 17 22 ns tr Driver Rise Time RLDIFF = 60 18 ns tf Driver Fall Time CL1 =CL2 = 100 pF 18 ns tZH Driver Enable to Output High CL = 100 pF (Figure 4 and Figure 6) S1 Open 29 100 ns tZL Driver Enable to Output Low CL = 100 pF (Figure 4 and Figure 6) S2 Open 31 60 ns tLZ Driver Disable Time from Low CL = 15 pF (Figure 4 and Figure 6) S2 Open 13 30 ns tHZ Driver Disable Time from High CL = 15 pF (Figure 4 and Figure 6) S1 Open 19 200 ns tPLH Receiver Input to Output CL = 15 pF (Figure 2 and Figure 7) 30 37 ns tPHL Receiver Input to Output S1 and S2 Closed 32 37 ns tZL Receiver Enable to Output Low CL = 15 pF (Figure 2 and Figure 8) S2 Open 15 20 ns tZH Receiver Enable to Output High CL = 15 pF (Figure 2 and Figure 8) S1 Open 11 20 ns tLZ Receiver Disable from Low CL = 15 pF (Figure 2 and Figure 8) S2 Open 28 32 ns tHZ Receiver Disable from High CL = 15 pF (Figure 2 and Figure 8) S1 Open 13 35 ns (Figure 3 and Figure 5) 3 www.national.com AC Test Circuits DS008759-2 FIGURE 1. DS008759-3 Note: S1 and S2 of load circuit are closed except as otherwise mentioned. FIGURE 2. DS008759-4 FIGURE 3. DS008759-5 Note: Unless otherwise specified the switches are closed. FIGURE 4. Switching Time Waveforms DS008759-6 FIGURE 5. Driver Propagation Delays and Transition Times www.national.com 4 Switching Time Waveforms (Continued) DS008759-7 FIGURE 6. Driver Enable and Disable Times DS008759-8 Note: Differential input voltage may may be realized by grounding RI and pulsing RI between +2.5V and -2.5V FIGURE 7. Receiver Propagation Delays DS008759-9 FIGURE 8. Receiver Enable and Disable Times Function Tables DS75176B Transmitting Inputs Line Outputs RE DE DI Condition DO DO X 1 1 No Fault 0 1 X 1 0 No Fault 1 0 X 0 X X Z Z X 1 X Fault Z Z 5 www.national.com Function Tables (Continued) DS75176B Receiving Inputs Outputs RE DE RI-RI RO 0 0 +0.2V 1 0 0 -0.2V 0 0 0 Inputs Open** 1 1 0 X Z X -- Don't care condition Z -- High impedance state Fault -- Improper line conditons causing excessive power dissipation in the driver, such as shorts or bus contention situations **This is a fail safe condition Typical Application DS008759-11 www.national.com 6 Physical Dimensions inches (millimeters) unless otherwise noted Lit. # 103669 Molded Dual-In-Line Package (N) Order Number DS75176BN or DS75176BTN NS Package Number N08E 7 www.national.com DS75176B/DS75176BT Multipoint RS-485/RS-422 Transceivers LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component is any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness. ure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 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National P/N DS75176B - Multipoint RS-485/RS-422 Transceivers Design file:////roarer/root/data13/imaging/BIT...04/08032000/NATL/08022000/DS75176B.html Purchasing Quality Company Jobs Products > Analog - Interface > Data Transmission Circuits > RS-485 > DS75176B Product Folder DS75176B Multipoint RS-485/RS-422 Transceivers Generic P/N 75176B Contents General Description Features Datasheet Package Availability, Models, Samples & Pricing Application Notes Parametric Table Number of Drivers 1 Number of Receivers 1 Supply Voltage 5V Process Bipolar General Description The DS75176B is a high speed differential TRI-STATE bus/line transceiver designed to meet the requirements of EIA standard RS485 with extended common mode range (+12V to -7V), for multipoint data transmission. In addition, it is compatible with RS-422. The driver and receiver outputs feature TRI-STATE capability, for the driver outputs over the entire common mode range of +12V to -7V. Bus contention or fault situations that cause excessive power dissipation within the device are handled by a thermal shutdown circuit, which forces the driver outputs into the high impedance state. DC specifications are guaranteed over the 0 to 70C temperature and 4.75V to 5.25V supply voltage range. Features 1 of 3 05-Aug-2000 12:43 PM National P/N DS75176B - Multipoint RS-485/RS-422 Transceivers file:////roarer/root/data13/imaging/BIT...04/08032000/NATL/08022000/DS75176B.html Meets EIA standard RS485 for multipoint bus transmission and is compatible with RS-422. Small Outline (SO) Package option available for minimum board space. 22 ns driver propagation delays. Single +5V supply. -7V to +12V bus common mode range permits 7V ground difference between devices on the bus. Thermal shutdown protection. High impedance to bus with driver in TRI-STATE or with power off, over the entire common mode range allows the unused devices on the bus to be powered down. Pin out compatible with DS3695/A and SN75176A/B. Combined impedance of a driver output and receiver input is less than one RS485 unit load, allowing up to 32 transceivers on the bus. 70 mV typical receiver hysteresis. Datasheet Title DS75176B/DS75176BT Multipoint RS-485/RS-422 Transceivers DS75176B/DS75176BT Multipoint RS-485/RS-422 Transceivers (JAPANESE) Size (in Kbytes) 209 Kbytes Date Receive View Online View 4-Mar-99 Online 281 Kbytes Download Download Receive via Email Download Please use Adobe Acrobat to view PDF file(s). If you have trouble printing, see Printing Problems. Package Availability, Models, Samples & Pricing 2 of 3 05-Aug-2000 12:43 PM National P/N DS75176B - Multipoint RS-485/RS-422 Transceivers file:////roarer/root/data13/imaging/BIT...04/08032000/NATL/08022000/DS75176B.html Package Part Number Models Status Budgetary Samples Pricing & Electronic $US Quantity Orders each Std Pack Size Type # pins DS75176BM SOIC NARROW 8 Full production N/A . N/A Order Parts 2500+ $0.4730 tube of 95 DS75176BMX SOIC NARROW 8 Full production N/A . N/A Order Parts 2500+ $0.4730 reel of 2500 8 Full production N/A . N/A Order Parts 2500+ tube [logo]UZ2 $0.4730 of 40 Full production N/A N/A DS75176BN MDIP DS75176B MDA die SPICE IBIS . N/A Application Notes Size (in Kbytes) Title AN-915: Application Note 915 Automotive Physical Layer SAE J1708 66 Kbytes and the DS36277 Date View Online Download Receive via Email 5-Oct-98 View Online Download Receive via Email AN-1057: Application Note 1057 Ten Ways to Bulletproof RS-485 Interfaces 155 Kbytes 5-Oct-98 View Online Download Receive via Email AN-741: Differentiating FDDI Concentrators 276 Kbytes 5-Aug-95 View Online Download Receive via Email Please use Adobe Acrobat to view PDF file(s). If you have trouble printing, see Printing Problems. [Information as of 2-Aug-2000] Quick Search Parametric Search System Diagrams Product Tree Home About Languages . About the Site . 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