SN676B, SN776B Bidirectional Transceivers Meet or Exceed the Requirements of ANSI Standards TIA/EIA--B and TIA/EIA-8-A and ITU Recommendations V. and X.7 Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments -State Driver and Receiver s Individual Driver and Receiver Enables Wide Positive and Negative / Bus Voltage Ranges Driver Capability...±6 ma Max Thermal Shutdown Protection Driver Positive and Negative Current Limiting Receiver Impedance... kω Min Receiver Sensitivity...± mv Receiver Hysteresis... mv Typ Operate From Single -V Supply R RE DE D SLLSB JULY 98 REVISED JUNE 999 D OR P PACKAGE (TOP VIEW) 8 7 6 V CC B A GND description The SN676B and SN776B differential bus transceivers are monolithic 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--B and TIA/EIA-8-A and ITU Recommendations V. and X.7. The SN676B and SN776B combine a -state differential line driver and a differential input line receiver, both of which operate from a single -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 V CC =. 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 6 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 C. The receiver features a minimum input impedance of kω, an input sensitivity of ± mv, and a typical input hysteresis of mv. The SN676B and SN776B can be used in transmission-line applications employing the SN77 and SN77 quadruple differential line drivers and SN77 and SN77 quadruple differential line receivers. The SN676B is characterized for operation from C to C and the SN776B is characterized for operation from C to 7 C. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright 999, Texas Instruments Incorporated POST OFFICE BOX 6 DALLAS, TEXAS 76
SN676B, SN776B SLLSB JULY 98 REVISED JUNE 999 Function Tables DRIVER INPUT ENABLE OUTPUTS D DE A B H H H L L H L H X L Z Z RECEIVER DIFFERENTIAL INPUTS ENABLE OUTPUT A B RE R VID. V L H. V < VID <. V L? VID. V L L X H Z Open L? H = high level, L = low level,? = indeterminate, X = irrelevant, Z = high impedance (off) logic symbol logic diagram (positive logic) DE RE D EN EN 6 7 A B DE D RE R 6 7 A B Bus R This symbol is in accordance with ANSI/IEEE Std 9-98 and IEC Publication 67-. POST OFFICE BOX 6 DALLAS, TEXAS 76
SN676B, SN776B SLLSB JULY 98 REVISED JUNE 999 schematics of inputs and outputs EQUIVALENT OF EACH INPUT TYPICAL OF A AND B I/O PORTS TYPICAL OF RECEIVER OUTPUT VCC R(eq) VCC VCC 8 Ω NOM 6.8 kω NOM 96 Ω NOM 96 Ω NOM Driver input: R(eq) = kω NOM Enable inputs: R(eq )= 8 kω NOM R(eq) = equivalent resistor / Port GND absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, V CC (see Note )............................................................. 7 V Voltage range at any bus terminal.................................................... V to V Enable input voltage, V I..................................................................... V Package thermal impedance, θ JA (see Note ): D package................................. 97 C/W P package.................................. C/W Lead temperature,6 mm (/6 inch) from case for seconds............................... 6 C Storage temperature range, T stg................................................... 6 C to C 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. NOTES:. All voltage values, except differential input/output bus voltage, are with respect to network ground terminal.. The package thermal impedance is calculated in accordance with JESD, except for through-hole packages, which use a trace length of zero. recommended operating conditions MIN TYP MAX UNIT Supply voltage, VCC.7. V Voltage at any bus terminal (separately or common mode), VI or VIC High-level input voltage, VIH D, DE, and RE V Low-level input voltage, VIL D, DE, and RE.8 V Differential input voltage, VID (see Note ) ± V High-level output current, IOH Low-level output current, IOL Operating free-air temperature, TA 7 V Driver 6 ma Receiver µa Driver 6 Receiver 8 SN676B SN776B 7 NOTE : Differential-input/output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B. ma C POST OFFICE BOX 6 DALLAS, TEXAS 76
SN676B, SN776B SLLSB JULY 98 REVISED JUNE 999 DRIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIK clamp voltage II = 8 ma. V VO voltage IO = 6 V VOD Differential output voltage IO =..6 6 V VOD Differential output voltage RL = Ω, See Figure / VOD or RL = Ω, See Figure.. V VOD Differential output voltage See Note. V VOD Change in magnitude of differential output ±. V voltage VOC Common-mode mode output voltage RL = Ωor Ω, See Figure VOC IO Change in magnitude of common-mode ±. V output voltage current + disabled, VO = V See Note VO = 7 V.8 IIH High-level input current VI =. V µa IIL Low-level input current VI =. V µa IOS Short-circuit output current ICC Supply current (total package) No load VO = 7 V VO = VO = VCC VO = V s enabled 7 s disabled 6 The power-off measurement in ANSI Standard TIA/EIA--B applies to disabled outputs only and is not applied to combined inputs and outputs. All typical values are at and TA = C. 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. The minimum VOD with a -Ω load is either / VOD or V, whichever is greater. NOTES:. See ANSI Standard TIA/EIA-8-A, Figure., Test Termination Measurement.. This applies for both power on and off; refer to ANSI Standard TIA/EIA-8-A for exact conditions. The TIA/EIA--B limit does not apply for a combined driver and receiver terminal. switching characteristics, V CC = V, R L = kω, T A = C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT td(od) Differential-output delay time ns RL =Ω Ω, See Figure tt(od) Differential-output transition time ns tpzh enable time to high level See Figure 8 ns tpzl enable time to low level See Figure 6 ns tphz disable time from high level See Figure ns tplz disable time from low level See Figure ns V V ma ma ma POST OFFICE BOX 6 DALLAS, TEXAS 76
SN676B, SN776B SYMBOL EQUIVALENTS DATA-SHEET PARAMETER TIA/EIA--B TIA/EIA-8-A VO Voa, Vob Voa, Vob VOD Vo Vo VOD Vt (RL = Ω) Vt (RL = Ω) Vt (Test Termination VOD Measurement ) VOD Vt Vt Vt Vt VOC Vos Vos VOC Vos Vos Vos Vos IOS Isa, Isb IO Ixa, Ixb Iia, Iib SLLSB JULY 98 REVISED JUNE 999 RECEIVER SECTION electrical characteristics over recommended ranges of common-mode input voltage, supply voltage, and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIT + Positive-going input threshold voltage VO =.7 V, IO =. ma. V VIT Negative-going input threshold voltage VO =. V, IO = 8 ma. V Vhys hysteresis voltage (VIT + VIT ) mv VIK Enable clamp voltage II = 8 ma. V VID = mv, VOH High-level output voltage See Figure VID = mv, VOL Low-level output voltage See Figure IOH = µa,, IOL = 8 ma, 7.7 V. V IOZ High-impedance-state output current VO =. V to. V ± µa II Line input current Other input = V, VI = V See Note 6 VI = 7 V.8 IIH High-level enable input current VIH =.7 V µa IIL Low-level enable input current VIL =. V µa ri resistance VI = V kω IOS Short-circuit output current 8 ma ICC Supply current (total package) No load s enabled s disabled 6 All typical values are at, TA = C. The algebraic convention, in which the less positive (more negative) limit is designated minimum, is used in this data sheet for common-mode input voltage and threshold voltage levels only. NOTE 6: This applies for both power on and power off. Refer to EIA Standard TIA/EIA-8-A for exact conditions. ma ma POST OFFICE BOX 6 DALLAS, TEXAS 76
SN676B, SN776B SLLSB JULY 98 REVISED JUNE 999 switching characteristics, V CC = V, C L = pf, T A = C tplh tphl tpzh tpzl tphz tplz PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Propagation delay time, low- to high-level output ns VID = to V, See Figure 6 Propagation delay time, high- to low-level output ns enable time to high level ns See Figure 7 enable time to low level ns disable time from high level ns See Figure 7 disable time from low level 7 ns PARAMETER MEASUREMENT INFORMATION VOD RL RL VOC VID VOL +IOL VOH IOH Figure. Driver V OD and V OC Figure. Receiver V OH and V OL Generator (see Note B) Ω V RL = Ω CL = pf (see Note A). V td(od) % % tt(od) V. V V td(od) 9%. V % %. V tt(od) TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, % duty cycle, tr 6 ns, tf 6 ns, ZO = Ω. Figure. Driver Test Circuit and Voltage Waveforms 6 POST OFFICE BOX 6 DALLAS, TEXAS 76
SN676B, SN776B SLLSB JULY 98 REVISED JUNE 999 V or V Generator (see Note B) Ω S CL = pf (see Note A) RL = Ω tpzh. V. V. V tphz V V. V VOH Voff V TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, % duty cycle, tr 6 ns, tf 6 ns, ZO = Ω. Figure. Driver Test Circuit and Voltage Waveforms V or V Generator (see Note B) Ω S CL = pf (see Note A) V RL = Ω tpzl. V. V. V V V tplz V. V VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, % duty cycle, tr 6 ns, tf 6 ns, ZO = Ω. Figure. Driver Test Circuit and Voltage Waveforms V Generator (see Note B) Ω. V V CL = pf (see Note A) tplh. V. V. V tphl. V V VOH VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, % duty cycle, tr 6 ns, tf 6 ns, ZO = Ω. Figure 6. Receiver Test Circuit and Voltage Waveforms POST OFFICE BOX 6 DALLAS, TEXAS 76 7
SN676B, SN776B SLLSB JULY 98 REVISED JUNE 999 PARAMETER MEASUREMENT INFORMATION. V. V S kω S V CL = pf (see Note A) kω N96 or Equivalent Generator (see Note B) Ω S TEST CIRCUIT tpzh V. V V S to. V S Open S Closed tpzl V. V V S to. V S Closed S Open. V VOH V. V. V VOL. V V S to. V S Closed S Closed V. V V V S to. V S Closed S Closed tphz tplz. V VOH. V. V. V VOL VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, % duty cycle, tr 6 ns, tf 6 ns, ZO = Ω. Figure 7. Receiver Test Circuit and Voltage Waveforms 8 POST OFFICE BOX 6 DALLAS, TEXAS 76
SN676B, SN776B TYPICAL CHARACTERISTICS SLLSB JULY 98 REVISED JUNE 999 VOH V High-Level Voltage V..... DRIVER HIGH-LEVEL OUTPUT VOLTAGE HIGH-LEVEL OUTPUT CURRENT TA = C V OL Low-Level Voltage V..... DRIVER LOW-LEVEL OUTPUT VOLTAGE LOW-LEVEL OUTPUT CURRENT TA = C 6 8 IOH High-Level Current ma 6 8 IOL Low-Level Current ma Figure 8 Figure 9 VOD V Differential Voltage V.... DRIVER DIFFERENTIAL OUTPUT VOLTAGE OUTPUT CURRENT TA = C 6 7 8 IO Current ma 9 Figure POST OFFICE BOX 6 DALLAS, TEXAS 76 9
SN676B, SN776B SLLSB JULY 98 REVISED JUNE 999 TYPICAL CHARACTERISTICS VOH V High-Level Voltage V..... RECEIVER HIGH-LEVEL OUTPUT VOLTAGE HIGH-LEVEL OUTPUT CURRENT VID =. V TA = C VCC =.7 V Figure VCC =. V IOH High-Level Current ma VOH V High-Level Voltage V..... RECEIVER HIGH-LEVEL OUTPUT VOLTAGE FREE-AIR TEMPERATURE VID = mv IOH = µa Only the C to 7 C portion of the curve applies to the SN776B. Figure 6 8 TA Free-Air Temperature C RECEIVER LOW-LEVEL OUTPUT VOLTAGE LOW-LEVEL OUTPUT CURRENT RECEIVER LOW-LEVEL OUTPUT VOLTAGE FREE-AIR TEMPERATURE VOL V Low-Level Voltage V.6..... TA = C VOL V Low-Level Voltage V.6..... VID = mv IOL = 8 ma IOL Low-Level Current ma 6 8 TA Free-Air Temperature C Figure Figure POST OFFICE BOX 6 DALLAS, TEXAS 76
SN676B, SN776B TYPICAL CHARACTERISTICS SLLSB JULY 98 REVISED JUNE 999 VO V O Voltage V RECEIVER OUTPUT VOLTAGE ENABLE VOLTAGE VID =. V Load = 8 kω to GND TA = C VCC =. V VCC =.7 V VO O Voltage V 6 VCC =. V VCC =.7 V RECEIVER OUTPUT VOLTAGE ENABLE VOLTAGE VID =. V Load = kω to VCC TA = C... VI Enable Voltage V.. VI Enable Voltage V. Figure Figure 6 APPLICATION INFORMATION SN676B SN776B SN676B SN776B RT RT Up to Transceivers NOTE A: The line should be terminated at both ends in its characteristic impedance (RT = ZO). Stub lengths off the main line should be kept as short as possible. Figure 7. Typical Application Circuit POST OFFICE BOX 6 DALLAS, TEXAS 76
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of >> Semiconductor Home > Products > Analog & Mixed-Signal > Interface Products > Transmitters and Receivers > SN776B, DIFFERENTIAL BUS TRANSCEIVER Device Status: Active > Description > Features > Datasheets > Pricing/Samples/Availability > Application Notes > Related Documents > Development Tools > Applications Parameter Name SN776B Drivers Per Package Receivers Per Package Driver tpd (ns) Receiver tpd (ns) Supply Voltage(s) (V) ICC (max) (ma) 7 Footprint SN776 Description The SN676B and SN776B differential bus transceivers are monolithic 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-- B and TIA/EIA-8-A and ITU Recommendations V. and X.7. The SN676B and SN776B combine a -state differential line driver and a differential input line receiver, both of which operate from a single -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 V CC =. 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 6 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 C. The receiver features a minimum input impedance of k, an input sensitivity of ± mv, and a typical input hysteresis of mv. The SN676B and SN776B can be used in transmission-line applications employing the SN77 and SN77 quadruple differential line drivers and SN77 and SN77 quadruple differential line receivers.
of The SN676B is characterized for operation from - C to C and the SN776B is characterized for operation from C to 7 C. Features Bidirectional Transceivers Meet or Exceed the Requirements of ANSI Standards TIA/EIA--B and TIA/EIA- 8-A and ITU Recommendations V. and X.7 Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments -State Driver and Receiver s Individual Driver and Receiver Enables Wide Positive and Negative / Bus Voltage Ranges Driver Capability...±6 ma Max Thermal Shutdown Protection Driver Positive and Negative Current Limiting Receiver Impedance... k Min Receiver Sensitivity...± mv Receiver Hysteresis... mv Typ Operate From Single -V Supply To view the following documents, Acrobat Reader.x is required. To download a document to your hard drive, right-click on the link and choose 'Save'. Datasheets Full datasheet in Acrobat PDF: sllsb.pdf (7 KB) Full datasheet in Zipped PostScript: sllsb.psz (66 KB) Pricing/Samples/Availability Orderable Device Package Pins Temp (ºC) Application Reports Status AND 8 OVERVIEW AND SYSTEM CONFIGURATIONS (SLLA7 - Updated: //) ANALOG APPLICATIONS JOURNAL, FEBRUARY (SLYTA - Updated: //) ANALOG APPLICATIONS JOURNAL, NOVEMBER 999 (SLYTA - Updated: //) COMPARING BUS SOLUTIONS (SLLA67 - Updated: /6/) ELECTROSTATIC DISCHARGE APPLICATION NOTE (SSYA8 - Updated: //999) INTERFACE CIRCUITS FOR TIA/EIA-8 (SLLA6 - Updated: /6/) JITTER ANALYSIS (SLLA7 - Updated: //) Price/unit USD (-999) Pack Qty Availability / Samples SN776BD D 8 TO 7 ACTIVE. 7 Check stock or order SN776BDR D 8 TO 7 ACTIVE.8 Check stock or order SN776BP P 8 TO 7 ACTIVE. Check stock or order SN776BPS PS 8 TO 7 ACTIVE Check stock or order
of SKEW DEFINITIONS (SLLA6 - Updated: 8//999) THERMAL CHARACTERISTICS OF LINEAR AND LOGIC PACKAGES USING JEDEC PCB DESIGNS (SZZA7A - Updated: 9//999) Related Documents A STATISTICAL SURVEY OF COMMON-MODE NOISE (SLLA7, KB - Updated: //999) Table Data Updated on: 6// (c) Copyright Texas Instruments Incorporated. All rights reserved. Trademarks, Important Notice!, Privacy Policy