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SNB, SNB DIFFERENTIAL BUS TRANSCEIVERS
SLLSD JULY REVISED APRIL
DDDDDDDDDDDDD
Bidirectional Transceivers Meet or Exceed the Requirements of ANSI Standards TIA/EIAB
and TIA/EIAA and ITU Recommendations V. and X. Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments State Driver and Receiver Outputs Individual Driver
and Receiver Enables Wide Positive and Negative Input/Output Bus Voltage Ranges Driver
Output Capability . . . mA Max Thermal Shutdown Protection Driver Positive and Negative
Current Limiting Receiver Input Impedance . . . k Min Receiver Input Sensitivity . . . mV
Receiver Input Hysteresis . . . mV Typ Operate From Single V Supply
SNB . . . D OR P PACKAGE SNB . . . D, P, OR PS PACKAGE TOP VIEW
R RE DE D
VCC B A GND
description/ordering information
The SNB and SNB 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/EIAB and TIA/EIAA and ITU
Recommendations V. and X.. The SNB and SNB 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 activehigh and activelow 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 . These ports feature wide positive and negative commonmode voltage
ranges, making the device suitable for partyline applications. ORDERING INFORMATION
TA PDIP P C to C SOIC D SOP PS PDIP P C to C SOIC D PACKAGE Tube of Tube of Reel
of Reel of Tube of Tube of Reel of ORDERABLE PART NUMBER SNBP SNBD SNBDR
SNBPSR SNBP SNBD SNBDR TOPSIDE MARKING SNBP B AB SNBP B
Package drawings, standard packing quantities, thermal data, symbolization, and PCB
design guidelines are available at www.ti.com/sc/package.
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.
Copyright , Texas Instruments Incorporated
On products compliant to MILPRF, all parameters are tested unless otherwise noted. On all
other products, production processing does not necessarily include testing of all parameters.
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.
POST OFFICE BOX
DALLAS, TEXAS
The driver features positive and negative current limiting and thermal shutdown for
protection from linefault conditions. Thermal shutdown is designed to occur at a junction
temperature of approximately C. Z high impedance off logic diagram positive logic DE D RE
R A B Bus POST OFFICE BOX DALLAS. V lt VID lt . X irrelevant. Function Tables DRIVER
INPUT D H L X ENABLE DE H H L RECEIVER DIFFERENTIAL INPUTS AB VID . V VID .
and a typical input hysteresis of mV. an input sensitivity of mV. L low level.SNB. V . SNB
DIFFERENTIAL BUS TRANSCEIVERS SLLSD JULY REVISED APRIL description/ordering
information continued The driver is designed for up to mA of sink or source current. V X
Open ENABLE RE L L L H L OUTPUT R H L Z OUTPUTS A H L Z B L H Z H high level. The
receiver features a minimum input impedance of k. indeterminate. TEXAS . The SNB and
SNB can be used in transmissionline applications employing the SN and SN quadruple
differential line drivers and SN and SN quadruple differential line receivers.
. . . . . . . . . . . . . . . . . VI . . . . . . . . . . . . . . . . . . . . . . . TEXAS . . . . . . . . . . . . . . . . . . . . . . . .
V to V Enable input voltage. . . . . . . . . . . are with respect to network ground terminal. . . . . . .
. . . . . . . . . . . . . .SNB. . . . . The maximum allowable power dissipation at any allowable
ambient temperature is PD TJmax TA/JA. . . . . . . . These are stress ratings only. . . . . JA
see Notes and D package . . . . . . . V Package thermal impedance. . . . . . . . . . . . Operating
at the absolute maximum TJ of C can affect reliability. . . . . . . . . . . . . . C to C Stresses
beyond those listed under absolute maximum ratings may cause permanent damage to the
device. . . . . . All voltage values. . . SNB DIFFERENTIAL BUS TRANSCEIVERS SLLSD
JULY REVISED APRIL schematics of inputs and outputs EQUIVALENT OF EACH INPUT
VCC Req . . . . . . k NOM NOM NOM TYPICAL OF A AND B I/O PORTS VCC TYPICAL OF
RECEIVER OUTPUT VCC NOM Input Output GND Driver input Req k NOM Enable inputs
Req k NOM Req Equivalent Resistor Input/Output Port absolute maximum ratings over
operating freeair temperature range unless otherwise noted Supply voltage. . . . . . . . . . . . . . .
. . . . . . . . . . and TA. . . VCC see Note . . . . . . . . . . . . . . except differential input/output bus
voltage. . . . . . C/W PS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . Exposure to absolutemaximumrated conditions for extended periods
may affect device reliability. . . . . Maximum power dissipation is a function of TJmax. . . V
Voltage range at any bus terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . mm /
inch from case for seconds . . . and functional operation of the device at these or any other
conditions beyond those indicated under recommended operating conditions is not implied. .
. . . . . . . TJ . . . . . . . . . Tstg . . NOTES . . . . . . . C/W Operating virtual junction temperature.
C Lead temperature . . . . . C Storage temperature range. . . . C/W P package . . . . . . . . . . . .
POST OFFICE BOX DALLAS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JA. . . . . . . The
package thermal impedance is calculated in accordance with JESD . . . . . . . . . .
DE. TEXAS . POST OFFICE BOX DALLAS. TYP MAX . with respect to the inverting
terminal B. SNB DIFFERENTIAL BUS TRANSCEIVERS SLLSD JULY REVISED APRIL
recommended operating conditions MIN VCC VI or VIC VIH VIL VID IOH IOL TA Supply
voltage Voltage at any bus terminal separately or common mode Highlevel input voltage
Lowlevel input voltage Differential input voltage see Note Highlevel High level output current
Lowlevel Low level output current Operating free air temperature freeair Driver Receiver
Driver Receiver SNB SNB D. UNIT V V V V V mA A mA C NOTE Differential input/output bus
voltage is measured at the noninverting terminal A. . and RE .SNB. DE. and RE D.
respectively. refer to ANSI Standard TIA/EIAA for exact conditions.. V VO V VO VO VCC
VO V No load Outputs enabled Outputs disabled See Figure See Figure See Figure VO V
VO V See Figure See Figure MIN . VOD and VOC are the changes in magnitude of VOD and
VOC. TYP MAX . Test Termination Measurement .SNB. . . Output disabled. / VOD or . .
switching characteristics. that occur when the input is changed from a high level to a low
level. V VI . SNB DIFFERENTIAL BUS TRANSCEIVERS SLLSD JULY REVISED APRIL
DRIVER SECTION electrical characteristics over recommended ranges of supply voltage
and operating freeair temperature unless otherwise noted PARAMETER VIK VO VOD VOD
VOD VOD VOC VOC IO IIH IIL Input clamp voltage Output voltage Differential output voltage
g Differential output voltage Differential output voltage Change in magnitude g g of
differential output voltage Commonmode Common mode output voltage Change in
magnitude g g of commonmodeoutput voltage Output current Highlevel input current
Lowlevel input current TEST CONDITIONS II mA IO IO RL . The TIA/EIAB limit does not
apply for a combined driver and receiver terminal. See Figure See Figure See Figure See
Figure See Figure See Figure MIN TYP MAX UNIT ns ns ns ns ns ns POST OFFICE BOX
DALLAS. RL . . RL or . See Note VI . RL . The minimum VOD with a load is either / VOD or
V. . VCC V. See Note RL or . See ANSI Standard TIA/EIAA. whichever is greater. This
applies for both power on and off. TA C unless otherwise noted PARAMETER tdOD ttOD
tPZH tPZL tPHZ tPLZ Differentialoutput delay time Differentialoutput transition time Output
enable time to high level Output enable time to low level Output disable time from high level
Output disable time from low level TEST CONDITIONS RL . mA mA V V V V mA A A . UNIT
V V V V IOS Shortcircuit Short circuit output current ICC Supply current total package The
poweroff measurement in ANSI Standard TIA/EIAB applies to disabled outputs only and is
not applied to combined inputs and outputs. NOTES . RL . TEXAS . . RL or . . Figure . All
typical values are at VCC V and TA C.
Vob Vo Vt RL TIA/EIAA Voa. Vob Vo Vt RL Vt test termination measurement Vt Vt Vos Vos
Vos RECEIVER SECTION electrical characteristics over recommended ranges of
commonmode input voltage. . . V to . . SNB DIFFERENTIAL BUS TRANSCEIVERS SLLSD
JULY REVISED APRIL SYMBOL EQUIVALENTS DATASHEET PARAMETER VO VOD
VOD VOD VOD VOC VOC IOS IO Vt Vt Vos Vos Vos Isa. VO . supply voltage.SNB. . A. V
Other input V. V VIL . TEST CONDITIONS IO . See Figure VO . The algebraic convention.
NOTE This applies for both power on and power off. in which the less positive more negative
limit is designated minimum. See Figure VID mV. . V VI V VI V VI V IOH . Iib TIA/EIAB Voa.
Ixb Iia. V. Isb Ixa. VO . TA C. IOL mA. See Note VIH . and operating freeair temperature
unless otherwise noted PARAMETER VIT VIT Vhys VIK VOH VOL IOZ II IIH IIL rI IOS ICC
Positivegoing input threshold voltage Negativegoing input threshold voltage Input hysteresis
voltage VIT VIT Enable Input clamp voltage Highlevel High level output voltage Lowlevel Low
level output voltage Highimpedancestate output current Line input current Highlevel enable
input current Lowlevel enable input current Input resistance Shortcircuit output current
Supply current total package No load Outputs enabled Outputs disabled II mA VID mV. TYP
MAX . . . . TEXAS . mA IO mA MIN . V. UNIT V V mV V V V A mA A A k mA mA All typical
values are at VCC V. POST OFFICE BOX DALLAS. Refer to EIA Standard TIA/EIAA for
exact conditions. is used in this data sheet for commonmode input voltage and threshold
voltage levels only.
V V tdOD tdOD . CL includes probe and jig capacitance. V ttOD Generator see Note B V RL
ttOD TEST CIRCUIT VOLTAGE WAVEFORMS NOTES A. TEXAS . Driver VOD and VOC
Figure . Driver Test Circuit and Voltage Waveforms POST OFFICE BOX DALLAS. ZO . V . tf
ns. CL pF. See Figure V See Figure See Figure MIN TYP MAX UNIT ns ns ns PARAMETER
MEASUREMENT INFORMATION RL VOD RL VOC VID VOH VOL IOL IOH Figure . high. V
. TA C PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay time.to highlevel
output Propagation delay time. SNB DIFFERENTIAL BUS TRANSCEIVERS SLLSD JULY
REVISED APRIL switching characteristics. Figure . The input pulse is supplied by a
generator having the following characteristics PRR MHz.to lowlevel output Output enable
time to high level Output enable time to low level Output disable time from high level Output
disable time from low level TEST CONDITIONS VID to V. duty cycle.SNB. VCC V. low. B.
Receiver VOH and VOL V Input CL pF see Note A Output Output . tr ns.
ZO . tr ns. TEXAS . CL includes probe and jig capacitance. The input pulse is supplied by a
generator having the following characteristics PRR MHz. V VOH Voff V Input . ZO . Figure
.SNB. tr ns. tf ns. duty cycle. V V S V or V CL pF see Note A Generator see Note B Output .
Figure . V NOTES A. V VOL TEST CIRCUIT VOLTAGE WAVEFORMS V Input . Driver Test
Circuit and Voltage Waveforms V Input Generator see Note B . SNB DIFFERENTIAL BUS
TRANSCEIVERS SLLSD JULY REVISED APRIL PARAMETER MEASUREMENT
INFORMATION Output S V or V CL pF see Note A Generator see Note B RL tPZH Output .
B. V Output CL pF see Note A tPLH Output tPHL VOH . duty cycle. V . V . The input pulse is
supplied by a generator having the following characteristics PRR MHz. V . The input pulse is
supplied by a generator having the following characteristics PRR MHz. CL includes probe
and jig capacitance. V VOL TEST CIRCUIT VOLTAGE WAVEFORMS . V . Receiver Test
Circuit and Voltage Waveforms POST OFFICE BOX DALLAS. Figure . ZO . CL includes
probe and jig capacitance. V tPHZ VOLTAGE WAVEFORMS . Driver Test Circuit and
Voltage Waveforms V RL Output tPZL tPLZ V . tf ns. B. tr ns. B. tf ns. V V V NOTES A. duty
cycle. V V V TEST CIRCUIT NOTES A.
V S Closed S Closed V . V CL pF see Note A S k S V k N or Equivalent Generator see Note
B S TEST CIRCUIT V Input . The input pulse is supplied by a generator having the following
characteristics PRR MHz. V Output . V VOL NOTES A. V S Open S Closed Input V . SNB
DIFFERENTIAL BUS TRANSCEIVERS SLLSD JULY REVISED APRIL PARAMETER
MEASUREMENT INFORMATION . Receiver Test Circuit and Voltage Waveforms POST
OFFICE BOX DALLAS. V V tPZH VOH Output . V S Closed S Closed Input . CL includes
probe and jig capacitance. Figure . V S to . tr ns. tf ns. V VOL tPZL V Input .SNB. V . TEXAS
. V S to . V V S to . V V Output . V tPLZ S to . ZO . V V S Closed S Open . B. V VOLTAGE
WAVEFORMS VOH Output . V V tPHZ . duty cycle.
IOH HighLevel Output Current mA VCC V TA C VOL LowLevel Output Voltage V . . . IO
Output Current mA Figure POST OFFICE BOX DALLAS. LOWLEVEL OUTPUT VOLTAGE
vs LOWLEVEL OUTPUT CURRENT VCC V TA C IOL LowLevel Output Current mA Figure
DRIVER Figure DIFFERENTIAL OUTPUT VOLTAGE vs OUTPUT CURRENT VCC V TA C
VOD VOD Differential Output Voltage V .SNB. . . TEXAS . . . . . SNB DIFFERENTIAL BUS
TRANSCEIVERS SLLSD JULY REVISED APRIL TYPICAL CHARACTERISTICS DRIVER
DRIVER HIGHLEVEL OUTPUT VOLTAGE vs HIGHLEVEL OUTPUT CURRENT VOH VOH
HighLevel Output Voltage V . . . .
V VCC . . SNB DIFFERENTIAL BUS TRANSCEIVERS SLLSD JULY REVISED APRIL
TYPICAL CHARACTERISTICS RECEIVER RECEIVER HIGHLEVEL OUTPUT VOLTAGE
vs HIGHLEVEL OUTPUT CURRENT . TEXAS . . VOL VOL LowLevel Output Voltage V VOL
VOL LowLevel Output Voltage V VCC V TA C . . . . . . . IOL LowLevel Output Current mA TA
FreeAir Temperature C Figure Figure POST OFFICE BOX DALLAS. .SNB. VOH VOH
HighLevel Output Voltage V . . IOH HighLevel Output Current mA VCC . . . LOWLEVEL
OUTPUT VOLTAGE vs FREEAIR TEMPERATURE VCC V VID mV IOL mA . . V TA C
HIGHLEVEL OUTPUT VOLTAGE vs FREEAIR TEMPERATURE . VCC V VID mV IOH A TA
FreeAir Temperature C Only the C to C portion of the curve applies to the SNB. Figure
RECEIVER Figure RECEIVER LOWLEVEL OUTPUT VOLTAGE vs LOWLEVEL OUTPUT
CURRENT . . V VCC V VOH VOH HighLevel Output Voltage V VID . . .
Stub lengths off the main line should be kept as short as possible. V VO VO Output Voltage
V VCC . VI Enable Voltage V Figure Figure APPLICATION INFORMATION SNB SNB RT RT
SNB SNB Up to Transceivers NOTE A The line should be terminated at both ends in its
characteristic impedance RT ZO. V Load k to GND TA C OUTPUT VOLTAGE vs ENABLE
VOLTAGE VCC . . . . . Figure . Typical Application Circuit POST OFFICE BOX DALLAS. V
VID . TEXAS . VI Enable Voltage V .SNB. SNB DIFFERENTIAL BUS TRANSCEIVERS
SLLSD JULY REVISED APRIL TYPICAL CHARACTERISTICS RECEIVER RECEIVER
OUTPUT VOLTAGE vs ENABLE VOLTAGE VID . V VCC V VCC . V . V Load k to VCC TA C
VCC V VO VO Output Voltage V VCC .
OBSOLETE TI has discontinued the production of the device.ti.com Oct PACKAGING
INFORMATION Orderable Device SNBD SNBDE SNBDG SNBDR SNBDRE SNBDRG
SNBP SNBPE SNBD SNBDE SNBDG SNBDR SNBDRE SNBDRG SNBP SNBPE SNBPSR
SNBPSRG Status ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE
ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE
Package Type SOIC SOIC SOIC SOIC SOIC SOIC PDIP PDIP SOIC SOIC SOIC SOIC
SOIC SOIC PDIP PDIP SO SO Package Drawing D D D D D D P P D D D D D D P P PS PS
Pins Package Eco Plan Qty Green RoHS amp no Sb/Br Green RoHS amp no Sb/Br Green
RoHS amp no Sb/Br Lead/Ball Finish CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU
CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU
CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU
MSL Peak Temp LevelCYEAR LevelCYEAR LevelCUNLIM LevelCYEAR LevelCYEAR
LevelCUNLIM LevelNCNCNC LevelNCNCNC LevelCYEAR LevelCYEAR LevelCYEAR
LevelCYEAR LevelCYEAR LevelCYEAR LevelNCNCNC LevelNCNCNC LevelCUNLIM
LevelCUNLIM Green RoHS amp no Sb/Br Green RoHS amp no Sb/Br Green RoHS amp no
Sb/Br PbFree RoHS PbFree RoHS Green RoHS amp no Sb/Br Green RoHS amp no Sb/Br
Green RoHS amp no Sb/Br Green RoHS amp no Sb/Br Green RoHS amp no Sb/Br Green
RoHS amp no Sb/Br PbFree RoHS PbFree RoHS Green RoHS amp no Sb/Br Green RoHS
amp no Sb/Br 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. by weight in homogeneous materials. Green RoHS amp no Sb/Br TI defines
quotGreenquot to mean PbFree RoHS compatible.ti. Eco Plan . Device is in production to
support existing customers. TBD The PbFree/Green conversion plan has not been defined.
TI PbFree products are suitable for use in specified leadfree processes. and a lifetimebuy
period is in effect. but TI does not recommend using this part in a new design. Where
designed to be soldered at high temperatures.PACKAGE OPTION ADDENDUM www.
PbFree RoHS TIs terms quotLeadFreequot or quotPbFreequot mean semiconductor
products that are compatible with the current RoHS requirements for all substances.
PREVIEW Device has been announced but is not in production. NRND Not recommended
for new designs.The planned ecofriendly classification PbFree RoHS or Green RoHS amp no
Sb/Br . and free of Bromine Br and Antimony Sb based flame AddendumPage . Samples
may or may not be available.please check http//www.com/productcontent for the latest
availability information and additional product content details. including the requirement that
lead not exceed .
Efforts are underway to better integrate information from third parties. and thus CAS
numbers and other limited information may not be available for release. and makes no
representation or warranty as to the accuracy of such information. Peak Temp.PACKAGE
OPTION ADDENDUM www.com Oct retardants Br or Sb do not exceed . TI bases its
knowledge and belief on information provided by third parties. . TI and TI suppliers consider
certain information to be proprietary.ti.The Moisture Sensitivity Level rating according to the
JEDEC industry standard classifications. AddendumPage . In no event shall TIs liability
arising out of such information exceed the total purchase price of the TI parts at issue in this
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Important Information and DisclaimerThe information provided on this page represents TIs
knowledge and belief as of the date that it is provided. and peak solder temperature. by
weight in homogeneous material MSL.
. PLASTIC DUALINLINE . MAX /D / NOTES A. . . . NOM Gage Plane . C. . . . . .ti. . . . Falls
within JEDEC MS For the latest package information. go to http//www. . This drawing is
subject to change without notice. All linear dimensions are in inches millimeters.
.MECHANICAL DATA MPDIA JANUARY REVISED JUNE P RPDIPT . . . TEXAS . MIN . . .
.com/sc/docs/package/pkginfo. . . . MAX Seating Plane . . . . . B. M .htm POST OFFICE BOX
DALLAS. MIN . MAX .
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