SN75177B, SN75178B DIFFERENTIAL BUS REPEATERS

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1 SN777B, SN778B SLLSC D66, JULY 98 REVISED FEBRUARY 99 Meets EIA Standards RS--A and RS-8 and CCITT Recommendations V. and X.7 Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments -State s Bus Voltage Range... 7 V to V Positive and Negative Current Limiting Driver Capability... 6 ma Max Driver Thermal Shutdown Protection Receiver Impedance... kω Min Receiver Sensitivity... ± mv Receiver Hysteresis... mv Typ Operates From Single -V Supply Low Power Requirements description SN777B...D OR P PACKAGE (TOP VIEW) V CC T GND A B Z Y SN778B...P PACKAGE (TOP VIEW) V CC T GND A B Z Y THE SN777B IS NOT RECOMMDED FOR NEW DESIGN The SN777B and SN778B differential bus repeaters are monolithic integrated devices each designed for one-way data communication on multipoint bus transmission lines. These devices are designed for balanced transmission bus line applications and meet EIA Standard RS--A and RS-8 and CCITT Recommendations V. and X.7. Each device is designed to improve the performance of the data communication over long bus lines. The SN777B and SN778B are identical except for the complementary enable inputs, which allow the devices to be used in pairs for bidirectional communication. The SN777B and SN778B feature positive- and negative-current limiting -state outputs for the receiver and driver. The receiver features high input impedance, input hysteresis for increased noise immunity, and input sensitivity of ± mv over a common-mode input voltage range of 7 V to V. The driver features thermal shutdown for protection from line fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately C. The driver is designed to drive current loads up to 6 ma maximum. The SN777B and SN778B are designed for optimum performance when used on transmission buses employing the SN77 and SN77 differential line drivers, SN77 and SN77 differential line receivers, or SN776B bus transceiver. Function Tables SN777B DIFFERTIAL INPUTS ABLE OUTPUTS A B T Y Z VID. V H H H L. V < VID <. V H??? VID. V H L L H X L Z Z Z SN778B DIFFERTIAL INPUTS ABLE OUTPUTS A B T Y Z VID. V L H H L. V < VID <. V L??? VID. V L L L H X H Z Z Z H = high level, L = low level,? = indeterminate, X = irrelevant, Z = impedance (off) 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 99, Texas Instruments Incorporated POST OFFICE BOX 6 DALLAS, TEXAS 76

2 SN777B, SN778B SLLSC D66, JULY 98 REVISED FEBRUARY 99 logic symbols logic diagrams (positive logic) A B T 8 7 SN777B 6 Y Z A B T 8 7 SN777B Receiver Driver 6 Y Z A B T 8 7 SN778B 6 Y Z A B T 8 7 SN778B Receiver Driver 6 Y Z These symbols are in accordance with ANSI/IEEE Std 9-98 and IEC Publication 67-. schematics of inputs and outputs EQUIVALT OF EACH INPUT TYPICAL OF ALL DRIVER OUTPUTS VCC Req VCC Driver input: Req = kω NOM Enable inputs: Req = 8 kω NOM EQUIVALT OF EACH RECEIVER INPUT VCC GND TYPICAL OF RECEIVER OUTPUT VCC 8 Ω NOM 6.8 kω NOM 96 Ω NOM 96 Ω NOM POST OFFICE BOX 6 DALLAS, TEXAS 76

3 SN777B, SN778B SLLSC D66, JULY 98 REVISED FEBRUARY 99 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, V CC (see Note ) V Voltage range at any bus terminal V to V Differential input voltage (see Note ) ± V Enable input voltage V Continuous total dissipation See Dissipation Rating Table Operating free-air temperature range C to 7 C Storage temperature range C to C Lead temperature,6 mm (/6 inch) from case for seconds C NOTES:. All voltage values, except differential input voltage, are with respect to network ground terminal.. Differential input voltage is measured at the noninverting input with respect to the corresponding inverting input. PACKAGE recommended operating conditions DISSIPATION RATING TABLE TA C POWER RATING DERATING FACTOR ABOVE TA = C TA = 7 C POWER RATING D 7 mw.8 mw/ C 6 mw P mw 8. mw/ C 6 mw MIN NOM MAX UNIT Supply voltage, VCC.7. V High-level input voltage, VIH or V low-level input voltage, VIL or.8 V Common-mode input voltage, VIC 7 V Differential input voltage, VID ± V High-level output current, IOH Low-level output current, IOL Driver 6 ma Receiver µa Driver 6 Receiver 8 Operating free-air temperature, TA 7 C The algebraic convention, where the less-positive (more-negative) limit is designated minimum, is used in this data sheet for common-mode input voltage and threshold voltage. ma POST OFFICE BOX 6 DALLAS, TEXAS 76

4 SN777B, SN778B SLLSC D66, JULY 98 REVISED FEBRUARY 99 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 VO voltage IO = 6 V VOD Differential output voltage IO =. 6 V VOD Differential output voltage RL = Ω, See Figure / VOD or RL = Ω, See Figure.. VOD Differential output voltage See Note. V VOD VOC VOC Change in magnitude of diferential output voltage Common-mode mode output voltage RL = Ω or Ω, See Figure V ±. V Change in magnitude of ±. V common-mode output voltage IO current VCC =, VO = 7 V to V ± µa IOZ High-impedance-state output current VO = 7 V to V ± µa IIH High-level input current VI =. V µa IIL Low-level input current VI =. V µa VO = 7 V IOS Short-circuit output current VO = VCC ma ICC Supply current (total package) No load VO = V s enabled 7 7 s disabled 6 All typical values are at VCC = V 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, whichever is greater. NOTE : See Figure. of EIA Standard RS-8. switching characteristics, V CC = V, T A = C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tdd Differential-output delay time ns RL =Ω Ω, See Figure ttd Differential-output transition time ns tpzh enable time to high level RL = Ω, See Figure 8 ns tpzl enable time to low level RL = Ω, See Figure 6 ns tphz disable time from high level RL = Ω, See Figure ns tplz disable time from low level RL = Ω, See Figure ns V ma POST OFFICE BOX 6 DALLAS, TEXAS 76

5 SN777B, SN778B SYMBOL EQUIVALTS DATA SHEET PARAMETER RS--A RS-8 VO Voa, Vob Voa, Vob VOD Vo Vo VOD Vt (RL = Ω) Vt (RL = Ω) SLLSC D66, JULY 98 REVISED FEBRUARY 99 VOD Vt (Test Termination) Measurement ) VOD Vt Vt Vt Vt VOC VOS VOS VOC VOS VOS VOS VOS IOS Isa, Isb IO Ixa, Ixb Iia,Iib 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 VT+ Positive-going input threshold voltage VO =.7 V, IO =. ma. V VT Negative-going input threshold voltage VO =. V, IO = 8 ma. V Vhys hysteresis (VT+ VT ) mv VIK clamp voltage at II = 8 ma VOH High-level output voltage VID = mv, IOH = µa,.7 V See Figure VOL Low-level output voltage VID = mv, IOL = 8 ma,. V See Figure IOZ High-impedance-state impedance output current VO =. V to. V II Line input current Other input at V, VI = V See Note 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 kω IOS Short-circuit output current 8 ma ICC Supply current (total package) No load s enabled 7 7 s disabled 6 All typical values are at VCC = V, TA = C. The algebraic convention, where 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 : Refer to EIA Standard RS- for exact conditions. switching characteristics, V CC = V, T A = C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tplh Propagation delay time, low-to-high level output VID = to, 9 tphl Propagation delay time, high-to-low level output CL = pf, See Figure 6 tpzh enable time to high level CL = pf, See Figure 7 tpzl enable time to high level tphz disable time from high level CL = pf, See Figure 8 tplz disable time from low level 7 µa ma ma ns ns ns POST OFFICE BOX 6 DALLAS, TEXAS 76

6 SN777B, SN778B SLLSC D66, JULY 98 REVISED FEBRUARY 99 PARAMETER MEASUREMT 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 A) Ω TEST CIRCUIT RL = Ω CL = pf (see Note B) V V tdd tdd. V 9% % % %. V ttd ttd VOLTAGE WAVEFORMS Figure. Driver Differential- Test Circuit and Voltage Waveforms V or V Generator (see Note A) Ω S CL = pf (see Note B) SN778B Enable is Active Low TEST CIRCUIT RL = Ω (SN778B) (SN777B) Figure. Driver Enable and Disable Times tpzh. V tphz V V. V VOLTAGE WAVEFORMS VOH Voff V V or V S V RL = Ω (SN778B) (SN777B) tpzl V V Generator (see Note A) Ω SN778B Enable is Active Low CL = pf (see Note B). V tplz V. V VOL TEST CIRCUIT VOLTAGE WAVEFORMS Figure. Driver Enable and Disable Times NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR MHz, % duty cycle, tr 6 ns, tf 6 ns, ZO = Ω. B. CL includes probe and jig capacitance. 6 POST OFFICE BOX 6 DALLAS, TEXAS 76

7 SN777B, SN778B Generator (see Note A) Ω PARAMETER MEASUREMT INFORMATION TEST CIRCUIT CL = pf (see Note B) SLLSC D66, JULY 98 REVISED FEBRUARY 99 tplh Figure 6. Receiver Propagation Delay Times. V VOLTAGE WAVEFORMS. V V V tphl VOH VOL S kω S V CL = pf (see Note B) kω (see Note C) Generator (see Note A) Ω S TEST CIRCUIT (SN777B) (SN778B) tpzh V S to S Open S Closed V Á (SN777B) Á (SN778B) tpzl V S to S Closed S Open V (SN777B) (SN778B) VOH V V S to S Closed S Closed V Á (SN777B) (SN778B). V VOL V S to S Closed S Closed V tphz tplz. V VOH. V. V. V VOL VOLTAGE WAVEFORMS Figure 7. Receiver Enable and Disable Times NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR MHz, % duty cycle, tr 6 ns, tf 6 ns, ZO = Ω. B. CL includes probe and jig capacitance. C. All diodes are N96 or equivalent. POST OFFICE BOX 6 DALLAS, TEXAS 76 7

8 SN777B, SN778B SLLSC D66, JULY 98 REVISED FEBRUARY 99 TYPICAL CHARACTERISTICS. DRIVER HIGH-LEVEL OUTPUT VOLTAGE HIGH-LEVEL OUTPUT CURRT VCC = V TA = C. DRIVER LOW-LEVEL OUTPUT VOLTAGE LOW-LEVEL OUTPUT CURRT VCC = V TA = C High-Level Voltage V V OH.... High-Level Voltage V... Á Á V OH IOH High-Level Current ma IOH Low-Level Current ma Figure 8 Figure 9 Differential Voltage V VOD.... DRIVER DIFFERTIAL OUTPUT VOLTAGE DRIVER OUTPUT CURRT VCC = V TA = C V VO O Voltage V RECEIVER OUTPUT VOLTAGE DIFFERTIAL INPUT VOLTAGE VCC = V VIC = V VT VT+ IO = VIC = V VT VT+ TA = C VIC = V VT VT IO Current ma VID Differential Voltage mv Figure Figure 8 POST OFFICE BOX 6 DALLAS, TEXAS 76

9 SN777B, SN778B TYPICAL CHARACTERISTICS SLLSC D66, JULY 98 REVISED FEBRUARY 99 High-Level Voltage V V OH RECEIVER HIGH-LEVEL OUTPUT VOLTAGE HIGH-LEVEL OUTPUT CURRT VCC =.7 V VCC =. V VCC = V VID =. V TA = C High-Level Voltage V V OH RECEIVER HIGH-LEVEL OUTPUT VOLTAGE FREE-AIR TEMPERATURE VCC = V VID = mv IOH = µa IOH High-Level Current ma 6 TA Free-Air Temperature C 7 8 Figure Figure Low-Level Voltage V V OL RECEIVER LOW-LEVEL OUTPUT VOLTAGE LOW-LEVEL OUTPUT CURRT VCC = V TA = C V OL Low-Level Voltage V RECEIVER LOW-LEVEL OUTPUT VOLTAGE FREE-AIR TEMPERATURE VCC = V VID = mv IOL = 8 ma 6 8 IOL Low-Level Current ma TA Free-Air Temperature C Figure Figure POST OFFICE BOX 6 DALLAS, TEXAS 76 9

10 SN777B, SN778B SLLSC D66, JULY 98 REVISED FEBRUARY 99 APPLICATION INFORMATION Direction / SN779B RT Control RT / SN779B SN777B SN776B SN776B RT RT RT RT SN778B SN776B NOTE: The line should be terminated at both ends in its characteristic impedance. Stub lengths off the main line should be kept as short as possible. Figure 6. Typical Application Circuit POST OFFICE BOX 6 DALLAS, TEXAS 76

11 PACKAGE OPTION ADDDUM -Apr-7 PACKAGING INFORMATION Orderable Device Status () Package Type Package Drawing Pins Package Qty Eco Plan SN778BP ACTIVE PDIP P 8 Pb-Free (RoHS) SN778BPE ACTIVE PDIP P 8 Pb-Free (RoHS) () Lead/Ball Finish (6) MSL Peak Temp () Op Temp ( C) Device Marking (/) CU NIPDAU N / A for Pkg Type to 7 SN778BP CU NIPDAU N / A for Pkg Type to 7 SN778BP Samples () The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. 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. () Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed.% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either ) lead-based flip-chip solder bumps used between the die and package, or ) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed.% by weight in homogeneous material) () MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. () There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. () Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Addendum-Page

12 PACKAGE OPTION ADDDUM -Apr-7 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page

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ua9637ac DUAL DIFFERENTIAL LINE RECEIVER

ua9637ac DUAL DIFFERENTIAL LINE RECEIVER Meets or Exceeds the Requirements of ANSI Standards EIA/TIA-422-B and EIA/TIA-423-B and ITU Recommendations V.10 and V.11 Operates From Single 5-V Power Supply