SN65176BDR

Product Folder Sample & Buy Support & Community Tools & Software Technical Documents SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 SNx5176B Differential Bus Transceivers 1 Features 3 Description • • The SN65176B and SN75176B differential bus transceivers are designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines and meet ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.11 and X.27. 1 • • • • • • • • • • • Bidirectional Transceivers Meet or Exceed the Requirements of ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.11 and X.27 Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments 3-State Driver and Receiver Outputs Individual Driver and Receiver Enables Wide Positive and Negative Input/Output Bus Voltage Ranges ± 60-mA Max Driver Output Capability Thermal Shutdown Protection Driver Positive and Negative Current Limiting 12-kΩ Min Receiver Input Impedance ± 200-mV Receiver Input Sensitivity 50-mV Typ Receiver Input Hysteresis Operate From Single 5-V Supply 2 Applications • • • • • • • • Chemical/Gas Sensors Digital Signage HMI (Human Machine Interfaces) Motor Controls: AC Induction, Brushed and Brushless DC, Low- and High-Voltage, Stepper Motors, and Permanent Magnets TETRA Base Stations Telecom Towers: Remote Electrical Tilt Units (RET) and Tower Mounted Amplifiers (TMA) Weigh Scales Wireless Repeaters The SN65176B and SN75176B devices combine a 3state differential line driver and a differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have activehigh and active-low enables, respectively, that can be connected together externally to function as a direction control. The driver differential outputs and the receiver differential inputs are connected internally to form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus when the driver is disabled or VCC = 0. These ports feature wide positive and negative commonmode voltage ranges, making the device suitable for party-line applications. The driver is designed for up to 60 mA of sink or source current. The driver features positive and negative current limiting and thermal shutdown for protection from line-fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 150°C. The receiver features a minimum input impedance of 12 kΩ, an input sensitivity of ±200 mV, and a typical input hysteresis of 50 mV. Device Information(1) PART NUMBER SNx5176 PACKAGE (PIN) BODY SIZE (NOM) SOIC (8) 4.90 mm × 3.91 mm PDIP (8) 9.81 mm × 6.35 mm SOP (8) 6.20 mm × 5.30 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. 4 Simplified Schematic 3 DE 4 D 2 RE 6 A 1 R 7 Bus B 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 9 Features .................................................................. Applications ........................................................... Description ............................................................. Simplified Schematic............................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 1 2 3 4 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 4 4 4 5 6 6 6 7 Absolute Maximum Ratings ...................................... Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics – Driver ............................. Electrical Characteristics – Receiver ........................ Switching Characteristics – Driver ............................ Switching Characteristics – Receiver........................ Typical Characteristics .............................................. Parameter Measurement Information .................. 9 Detailed Description ............................................ 12 9.1 Overview ................................................................. 12 9.2 Functional Block Diagram ....................................... 12 9.3 Feature Description................................................. 12 9.4 Device Functional Modes........................................ 13 10 Application and Implementation........................ 14 10.1 Application Information.......................................... 14 10.2 Typical Application ............................................... 14 10.3 System Examples ................................................. 15 11 Power Supply Recommendations ..................... 16 12 Layout................................................................... 16 12.1 Layout Guidelines ................................................. 16 12.2 Layout Example .................................................... 16 13 Device and Documentation Support ................. 16 13.1 13.2 13.3 13.4 Related Links ........................................................ Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 16 16 16 16 14 Mechanical, Packaging, and Orderable Information ........................................................... 16 5 Revision History Changes from Revision E (January 2014) to Revision F Page • Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section. ..................................................................................................................... 1 • Moved Typical Characteristics inside of the Specifications section. ...................................................................................... 7 Changes from Revision D (April 2003) to Revision E Page • Updated document to new TI data sheet format - no specification changes. ........................................................................ 1 • Deleted Ordering Information table. ....................................................................................................................................... 1 • Added ESD warning. ............................................................................................................................................................ 16 2 Submit Documentation Feedback Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B SN65176B, SN75176B www.ti.com SLLS101F – JULY 1985 – REVISED JANUARY 2015 6 Pin Configuration and Functions Top View R RE DE D 1 8 2 7 3 6 4 5 VCC B A GND Pin Functions PIN NAME NO. TYPE DESCRIPTION R 1 O Logic Data Output from RS-485 Receiver RE 2 I Receive Enable (active low) DE 3 I Driver Enable (active high) D 4 I Logic Data Input to RS-485 Driver GND 5 — Device Ground Pin A 6 I/O RS-422 or RS-485 Data Line B 7 I/O RS-422 or RS-485 Data Line VCC 8 — Power Input. Connect to 5-V Power Source. Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B Submit Documentation Feedback 3 SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 www.ti.com 7 Specifications 7.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN MAX Supply voltage (2) VCC Voltage range at any bus terminal –10 UNIT 7 V 15 V VI Enable input voltage 5.5 V TJ Operating virtual junction temperature 150 °C Tstg Storage temperature range 150 °C 260 °C –65 Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds (1) (2) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values, except differential input/output bus voltage, are with respect to network ground terminal. 7.2 Recommended Operating Conditions VCC Supply voltage VI or VIC Voltage at any bus terminal (separately or common mode) VIH High-level input voltage D, DE, and RE VIL Low-level input voltage D, DE, and RE VID Differential input voltage (1) IOH High-level output current IOL Low-level output current TA Operating free-air temperature (1) MIN TYP MAX UNIT 4.75 5 5.25 V 12 V -7 2 V 0.8 V ±12 V –60 mA –400 µA Driver Receiver Driver 60 Receiver 8 SN65176B –40 105 SN75176B 0 70 mA °C Differential input/output bus voltage is measured at the non-inverting terminal A, with respect to the inverting terminal B. 7.3 Thermal Information SNx5176 THERMAL METRIC (1) BD BP BPS UNIT 95 °C/W 8 PINS RθJA (1) 4 Junction-to-ambient thermal resistance 97 85 For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953). Submit Documentation Feedback Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B SN65176B, SN75176B www.ti.com SLLS101F – JULY 1985 – REVISED JANUARY 2015 7.4 Electrical Characteristics – Driver over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) TEST CONDITIONS (1) PARAMETER MIN VIK Input clamp voltage II = –18 mA VO Output voltage IO = 0 0 |VOD1| Differential output voltage IO = 0 1.5 RL = 100 Ω, see Figure 10 ½ VOD1 or 2 TYP (2) MAX UNIT –1.5 V 6 V 3.6 6 V 2.5 5 (3) |VOD2| Differential output voltage VOD3 Differential output voltage See ∆|VOD| Change in magnitude of differential output voltage (5) RL = 54 Ω or 100 Ω, see Figure 10 VOC Common-mode output voltage RL = 54 Ω or 100 Ω, see Figure 10 ∆|VOC| Change in magnitude of common-mode output voltage (5) RL = 54 Ω or 100 Ω, see Figure 10 IO Output current Output disabled (6) IIH High-level input current VI = 2.4 V 20 µA IIL Low-level input current VI = 0.4 V –400 µA VO = –7 V –250 VO = 0 –150 IOS Short-circuit output current RL = 54 Ω, see Figure 10 1.5 (4) 1.5 -1 (1) (2) (3) (4) (5) (6) Supply current (total package) No load V ±0.2 V +3 V ±0.2 V 1 VO = –7 V –0.8 250 VO = 12 V ICC 5 VO = 12 V VO = VCC V mA mA 250 Outputs enabled 42 70 Outputs disabled 26 35 mA The power-off measurement in ANSI Standard TIA/EIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs. All typical values are at VCC = 5 V and TA = 25°C. The minimum VOD2 with a 100-Ω load is either ½ VOD1 or 2 V, whichever is greater. See ANSI Standard TIA/EIA-485-A, Figure 3.5, Test Termination Measurement 2. Δ|VOD| and Δ|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. This applies for both power on and off; refer to ANSI Standard TIA/EIA-485-A for exact conditions. The TIA/EIA-422-B limit does not apply for a combined driver and receiver terminal. Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B Submit Documentation Feedback 5 SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 www.ti.com 7.5 Electrical Characteristics – Receiver over recommended ranges of common-mode input voltage, supply voltage, and operating free-air temperature (unless otherwise noted) PARAMETER VIT+ Positive-going input threshold voltage MIN TYP (1) TEST CONDITIONS MAX VO = 2.7 V, IO = –0.4 mA UNIT 0.2 VIT– Negative-going input threshold voltage Vhys Input hysteresis voltage (VIT+ – VIT–) VIK Enable Input clamp voltage II = –18 mA VOH High-level output voltage VID = 200 mV, IOH = –400 µA, see Figure 11 VOL Low-level output voltage VID = –200 mV, IOL = 8 mA, see Figure 11 0.45 V IOZ High-impedance-state output current VO = 0.4 V to 2.4 V ±20 µA II Line input current Other input = 0 V (3) IIH High-level enable input current VIH = 2.7 V 20 µA IIL Low-level enable input current VIL = 0.4 V –100 µA rI Input resistance VI = 12 V IOS Short-circuit output current –85 mA ICC Supply current (total package) (1) (2) (3) VO = 0.5 V, IO = 8 mA –0.2 V (2) V 50 mV –1.5 V VI = 12 V 1 VI = –7 V –0.8 12 mA kΩ –15 No load V 2.7 Outputs enabled 42 55 Outputs disabled 26 35 mA All typical values are at VCC = 5 V, TA = 25°C. The algebraic convention, in which the less positive (more negative) limit is designated minimum, is used in this data sheet for commonmode input voltage and threshold voltage levels only. This applies for both power on and power off. Refer to EIA Standard TIA/EIA-485-A for exact conditions. 7.6 Switching Characteristics – Driver VCC = 5 V, RL = 110 Ω, TA = 25°C (unless otherwise noted) TYP MAX td(OD) Differential-output delay time PARAMETER RL = 54 Ω, see Figure 12 TEST CONDITIONS MIN 15 22 UNIT ns tt(OD) Differential-output transition time RL = 54 Ω, see Figure 12 20 30 ns tPZH Output enable time to high level See Figure 13 85 120 ns tPZL Output enable time to low level See Figure 14 40 60 ns tPHZ Output disable time from high level See Figure 13 150 250 ns tPLZ Output disable time from low level See Figure 14 20 30 ns 7.7 Switching Characteristics – Receiver VCC = 5 V, CL = 15 pF, TA = 25°C PARAMETER TEST CONDITIONS tPLH Propagation delay time, low- to high-level output tPHL Propagation delay time, high- to low-level output tPZH Output enable time to high level tPZL Output enable time to low level tPHZ Output disable time from high level tPLZ Output disable time from low level 6 Submit Documentation Feedback VID = 0 to 3 V, see Figure 15 See Figure 16 See Figure 16 MIN TYP MAX 21 35 23 35 10 20 12 20 20 35 17 25 UNIT ns ns ns Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B SN65176B, SN75176B www.ti.com SLLS101F – JULY 1985 – REVISED JANUARY 2015 7.8 Typical Characteristics 5 VCC = 5 V TA = 25°C 4 3.5 3 2.5 2 1.5 1 4 3.5 3 2.5 2 1.5 1 0.5 0.5 0 0 –20 –40 –60 –80 –100 IOH – High-Level Output Current – mA 0 –120 Figure 1. Driver High-Level Output Voltage vs High-Level Output Current 3.5 120 3 2.5 2 1.5 1 0.5 0 10 20 30 40 50 60 70 80 IO – Output Current – mA 3 2.5 VCC = 5.25 V 2 VCC = 5 V 1.5 VCC = 4.75 V 1 0.5 0 –5 –10 –15 –20 –25 –30 –35 –40 –45 –50 IOH – High-Level Output Current – mA Figure 4. Receiver High-Level Output Voltage vs High-Level Output Current 0.6 VCC = 5 V VID = 200 mV IOH = –440 µA VOL – Low-Level Output Voltage – V VOL 4 4 3.5 0 90 100 5 4.5 VID = 0.2 V TA = 25°C 4.5 VOH – High-Level Output Voltage – V VOH VOD – Differential Output Voltage – V VOD 20 40 60 80 100 IOL – Low-Level Output Current – mA 5 VCC = 5 V TA = 25°C Figure 3. Driver Differential Output Voltage vs Output Current VOH – High-Level Output Voltage – V VOH 0 Figure 2. Driver Low-Level Output Voltage vs Low-Level Output Current 4 0 VCC = 5 V TA = 25°C 4.5 VOL – Low-Level Output Voltage – V VOH – High-Level Output Voltage – V VOH 5 4.5 3.5 3 2.5 2 1.5 1 VCC = 5 V TA = 25°C 0.5 0.4 0.3 0.2 0.1 0.5 0 –40 0 –20 0 20 40 60 80 100 120 0 Only the 0°C to 70°C portion of the curve applies to the SN75176B device. Figure 5. Receiver High-Level Output Voltage vs Free-Air Temperature 5 10 15 20 25 30 IOL – Low-Level Output Current – mA TA – Free-Air Temperature – °C Only the 0°C to 70°C portion of the curve applies to the SN75176B device. Figure 6. Receiver Low-Level Output Voltage vs Low-Level Output Current Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B Submit Documentation Feedback 7 SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 www.ti.com Typical Characteristics (continued) 5 0.5 VCC = 5 V VID = –200 mV IOL = 8 mA 0.4 0.3 0.2 VCC = 5.25 V VCC = 5 V 3 VCC = 4.75 V 2 1 0.1 0 –40 VID = 0.2 V Load = 8 kΩ to GND TA = 25°C 4 VO – Output Voltage – V VO VOL – Low-Level Output Voltage – V VOL 0.6 0 –20 0 20 40 60 80 100 0 120 0.5 1.5 2 2.5 3 Figure 8. Receiver Output Voltage vs Enable Voltage Figure 7. Receiver Low-Level Output Voltage vs Free-Air Temperature 6 VID = –0.2 V Load = 1 kΩ to VCC TA = 25°C VCC = 5.25 V 5 VO – Output Voltage – V VO 1 VI – Enable Voltage – V TA – Free-Air Temperature – °C VCC = 4.75 V VCC = 5 V 4 3 2 1 0 0 0.5 1 1.5 2 2.5 3 VI – Enable Voltage – V Figure 9. Receiver Output Voltage vs Enable Voltage 8 Submit Documentation Feedback Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B SN65176B, SN75176B www.ti.com SLLS101F – JULY 1985 – REVISED JANUARY 2015 8 Parameter Measurement Information RL 2 VOD2 RL 2 VOC Figure 10. Driver VOD and VOC ID VOH VOL +IOL –IOH Figure 11. Receiver VOH and VOL 3V Input Generator (see Note B) RL = 54 Ω CL = 50 pF (see Note A) 1.5 V 0V td(OD) td(OD) Output 50 Ω 1.5 V Output 3V 50% 10% 90% tt(OD) TEST CIRCUIT ≈2.5 V 50% 10% ≈–2.5 V tt(OD) VOLTAGE WAVEFORMS A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR ≤1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω. Figure 12. Driver Test Circuit and Voltage Waveforms Output S1 3V Input 1.5 V 1.5 V 0 V or 3 V 0V CL = 50 pF (see Note A) Generator (see Note B) 0.5 V tPZH RL = 110 Ω VOH Output 50 Ω TEST CIRCUIT 2.3 V tPHZ Voff ≈0 V VOLTAGE WAVEFORMS A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR ≤1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω. Figure 13. Driver Test Circuit and Voltage Waveforms Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B Submit Documentation Feedback 9 SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 www.ti.com Parameter Measurement Information (continued) 5V 3V S1 RL = 110 Ω Input 1.5 V 1.5 V Output 0V 3 V or 0 V CL = 50 pF (see Note A) Generator (see Note B) tPLZ tPZL 5V 0.5 V 50 Ω 2.3 V Output VOL TEST CIRCUIT VOLTAGE WAVEFORMS A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR ≤1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω. Figure 14. Driver Test Circuit and Voltage Waveforms 3V Input Generator (see Note B) 1.5 V 1.5 V Output 51 Ω 1.5 V CL = 15 pF (see Note A) 0V tPLH tPHL VOH Output 0V 1.3 V 1.3 V VOL TEST CIRCUIT VOLTAGE WAVEFORMS A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR ≤1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω. Figure 15. Receiver Test Circuit and Voltage Waveforms 10 Submit Documentation Feedback Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B SN65176B, SN75176B www.ti.com SLLS101F – JULY 1985 – REVISED JANUARY 2015 Parameter Measurement Information (continued) S1 1.5 V 2 kΩ –1.5 V S2 5V CL = 15 pF (see Note A) Generator (see Note B) 1N916 or Equivalent 5 kΩ 50 Ω S3 TEST CIRCUIT 3V Input 3V Input 1.5 V 0V tPZH S1 to 1.5 V S2 Open S3 Closed 1.5 V S1 to –1.5 V 0 V S2 Closed S3 Open tPZL VOH ≈4.5 V 1.5 V Output Output 0V 1.5 V VOL 3V 1.5 V Input 3V S1 to 1.5 V S2 Closed S3 Closed Input S1 to –1.5 V S2 Closed S3 Closed 1.5 V 0V tPHZ 0V tPLZ VOH 0.5 V Output ≈1.3 V Output 0.5 V ≈1.3 V VOL VOLTAGE WAVEFORMS A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR ≤1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω. Figure 16. Receiver Test Circuit and Voltage Waveforms Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B Submit Documentation Feedback 11 SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 www.ti.com 9 Detailed Description 9.1 Overview The SN65176B and SN75176B differential bus transceivers are integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines and meet ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.11 and X.27. The SN65176B and SN75176B devices combine a 3-state differential line driver and a differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, that can be connected together externally to function as a direction control. The driver differential outputs and the receiver differential inputs are connected internally to form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus when the driver is disabled or VCC = 0. These ports feature wide positive and negative common-mode voltage ranges, making the device suitable for party-line applications. The driver is designed for up to 60 mA of sink or source current. The driver features positive and negative current limiting and thermal shutdown for protection from line-fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 150°C. The receiver features a minimum input impedance of 12 kΩ, an input sensitivity of ±200 mV, and a typical input hysteresis of 50 mV. The SN65176B and SN75176B devices can be used in transmission-line applications employing the SN75172 and SN75174 quadruple differential line drivers and SN75173 and SN75175 quadruple differential line receivers. 9.2 Functional Block Diagram 3 DE 4 D 2 RE 6 A 1 7 R Bus B 9.3 Feature Description 9.3.1 Driver The driver converts a TTL logic signal level to RS-422 and RS-485 compliant differential output. The TTL logic input, DE pin, can be used to turn the driver on and off. Table 1. Driver Function Table (1) (1) 12 INPUT D ENABLE DE H H L X DIFFERENTIAL OUTPUTS A B H L H L H L Z Z H = high level, L = low level, X = irrelevant, Z = high impedance (off) Submit Documentation Feedback Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B SN65176B, SN75176B www.ti.com SLLS101F – JULY 1985 – REVISED JANUARY 2015 9.3.2 Receiver The receiver converts a RS-422 or RS-485 differential input voltage to a TTL logic level output. The TTL logic input, RE pin, can be used to turn the receiver logic output on and off. Table 2. Receiver Function Table (1) (1) DIFFERENTIAL INPUTS A–B ENABLE RE OUTPUT R VID ≥ 0.2 V L H –0.2 V < VID < 0.2 V L U VID ≤ –0.2 V L L X H Z Open L U H = high level, L = low level, U = unknown, Z = high impedance (off) 9.4 Device Functional Modes 9.4.1 Device Powered Both the driver and receiver can be individually enabled or disabled in any combination. DE and RE can be connected together for a single port direction control bit. 9.4.2 Device Unpowered The driver differential outputs and the receiver differential inputs are connected internally to form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus when the driver is disabled or VCC = 0. 9.4.3 Symbol Cross Reference Table 3. Symbol Equivalents DATA SHEET PARAMETER TIA/EIA-422-B TIA/EIA-485-A Voa, Vob VO Voa, Vob |VOD1| Vo Vo |VOD2| Vt ®L = 100 Ω) Vt ®L = 54 Ω) Vt (test termination measurement 2) |VOD3| ∆|VOD| | |Vt| – |Vt| | | |Vt – |Vt| | VOC |Vos| |Vos| ∆|VOC| |Vos – Vos| |Vos – Vos| IOS |Isa|, |Isb| IO |Ixa|, |Ixb| Iia, Iib Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B Submit Documentation Feedback 13 SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 www.ti.com 10 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 10.1 Application Information The device can be used in RS-485 and RS-422 physical layer communications. 10.2 Typical Application SN65176B SN75176B SN65176B SN75176B RT RT Up to 32 Transceivers The line should be terminated at both ends in its characteristic impedance ®T = ZO). Stub lengths off the main line should be kept as short as possible. Figure 17. Typical RS-485 Application Circuit 10.2.1 Design Requirements • 5-V power source • RS-485 bus operating at 10 Mbps or less • Connector that ensures the correct polarity for port pins • External fail safe implementation 10.2.2 Detailed Design Procedure • Place the device close to bus connector to keep traces (stub) short to prevent adding reflections to the bus line • If desired, add external fail-safe biasing to ensure +200 mV on the A-B port. 14 Submit Documentation Feedback Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B SN65176B, SN75176B www.ti.com SLLS101F – JULY 1985 – REVISED JANUARY 2015 Typical Application (continued) 10.2.3 Application Curves Figure 18. Eye Diagram for 10-Mbits/s over 100 feet of standard CAT-5E cable 120-Ω Termination at both ends. Scale is 1V per division and 25nS per division 10.3 System Examples EQUIVALENT OF EACH INPUT TYPICAL OF A AND B I/O PORTS TYPICAL OF RECEIVER OUTPUT VCC VCC VCC 85 Ω NOM R(eq) 16.8 kΩ NOM Input 960 Ω NOM 960 Ω NOM Output GND Driver input: R(eq) = 3 kΩ NOM Enable inputs: R(eq )= 8 kΩ NOM R(eq) = Equivalent Resistor Input/Output Port Figure 19. Schematics of Inputs and Outputs Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B Submit Documentation Feedback 15 SN65176B, SN75176B SLLS101F – JULY 1985 – REVISED JANUARY 2015 www.ti.com 11 Power Supply Recommendations Power supply should be 5V with a tolerance less than 10% 12 Layout 12.1 Layout Guidelines Traces from device pins A and B to connector must be short and capable of 250 mA maximum current. 12.2 Layout Example GND TTL Logic 1 R TTL Logic 2 RE 1.5 μF VCC 8 5V B B 7 Connector TTL Logic 3 DE TTL Logic 4 D A 6 GND 5 A GND Layout Diagram 13 Device and Documentation Support 13.1 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 4. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY SN65176B Click here Click here Click here Click here Click here SN75176B Click here Click here Click here Click here Click here 13.2 Trademarks All trademarks are the property of their respective owners. 13.3 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 13.4 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 14 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 16 Submit Documentation Feedback Copyright © 1985–2015, Texas Instruments Incorporated Product Folder Links: SN65176B SN75176B PACKAGE OPTION ADDENDUM www.ti.com 24-Aug-2018 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) SN65176BD ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 105 65176B SN65176BDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 105 65176B SN65176BDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 105 65176B SN65176BDRE4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 105 65176B SN65176BDRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 105 65176B SN65176BP ACTIVE PDIP P 8 50 Green (RoHS & no Sb/Br) CU NIPDAU N / A for Pkg Type -40 to 105 SN65176BP SN75176BD ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 75176B SN75176BDE4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 75176B SN75176BDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 75176B SN75176BDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 75176B SN75176BDRE4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 75176B SN75176BDRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 75176B SN75176BP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type 0 to 70 SN75176BP SN75176BPE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type 0 to 70 SN75176BP SN75176BPSR ACTIVE SO PS 8 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 A176B SN75176BPSRG4 ACTIVE SO PS 8 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 A176B (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 24-Aug-2018 LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of