sn55121, sn75121 dual line drivers slls074c september 1973 revised may 1998 1 post office box 655303 ? dallas, texas 75265 designed for digital data transmission over 50- w to 500- w coaxial cable, strip line, or twisted pair high speed t pd = 20 ns maximum at c l = 15 pf ttl compatible with single 5-v supply 2.4-v output at i oh = 75 ma uncommitted emitter-follower output structure for party-line operation short-circuit protection and-or logic configuration designed for use with triple line receivers sn55122, sn75122 designed to be interchangeable with signetics n8t13 description the sn55121 and sn75121 dual line drivers are designed for digital data transmission over lines having impedances from 50 to 500 w . they are also compatible with standard ttl logic and supply-voltage levels. the low-impedance emitter-follower outputs of the sn55121 and sn75121 can drive terminated lines such as coaxial cable or twisted pair. having the outputs uncommitted allows wired-or logic to be performed in party-line applications. output short-circuit protection is provided by an internal clamping network that turns on when the output voltage drops below approximately 1.5 v. all of the inputs are in conventional ttl configuration and the gating can be used during power-up and power-down sequences to ensure that no noise is introduced to the line. the sn55121 is characterized for operation over the full military temperature range of 55 c to 125 c. the sn75121 is characterized for operation from 0 c to 70 c. copyright ? 1998, texas instruments incorporated 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. 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. 3212019 910111213 4 5 6 7 8 18 17 16 15 14 2e 2d nc 2c 2b 1c 1d nc 1e 1f 1b 1a nc 2y 2a 2f 1y gnd nc nc no internal connection 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 1a 1b 1c 1d 1e 1f 1y gnd v cc 2f 2e 2d 2c 2b 2a 2y cc v the sn75121 is not recommended for new designs sn55121 ...j p ackage sn75121 ...d or n p ackage (top view) sn55121 . . . fk package (top view)
sn55121, sn75121 dual line drivers slls074c september 1973 revised may 1998 2 post office box 655303 ? dallas, texas 75265 function table inputs output a b c d e f y h h h h x x h x xxxhh h all other input combinations l h = high level, l = low level, x = irrelevant logic symbol 2 &1 2y 1y 9 7 & 2f 2e 2d 2c 2b 2a 1f 1e 1d 1c 1b 1a 15 14 13 12 11 10 6 5 4 3 2 1 2 this symbol is in accordance with ansi/ieee std 91-1984 and iec publication 617-12. pin numbers shown are for the d, j, and n packages. logic diagram (positive logic) 1 2 3 4 7 1y 10 11 12 13 9 2y 1a 1b 1c 1d 2a 2b 2c 2d 5 6 1e 1f 14 15 2e 2f schematic (each driver) v cc to other line driver 4 k w 4 k w a b c d e f gnd to other line driver 360 w 15 w y all resistor values shown are nominal.
sn55121, sn75121 dual line drivers slls074c september 1973 revised may 1998 3 post office box 655303 ? dallas, texas 75265 absolute maximum ratings over operating free-air temperature (unless otherwise noted) 2 supply voltage, v cc (see note 1) 6 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage 6 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . output voltage 6 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous total power dissipation see dissipation rating table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg 65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . case temperature for 60 seconds: fk package 260 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: j package 300 c . . . . . . . . . . . . . . . . . . . . . lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: d or n package 260 c . . . . . . . . . . . . . . . . 2 stresses beyond those listed under aabsolute maximum ratingso may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated under arecommended operating conditi onso is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. note 1: all voltage values are with respect to both ground terminals connected together. dissipation rating table package t a 25 c power rating derating factor above t a = 25 c t a = 70 c power rating t a = 125 c power rating d 950 mw 7.6 mw/ c 608 mw e fk 3 1375 mw 11.0 mw/ c 880 mw 275 mw j 3 1375 mw 11.0 mw/ c 880 mw 275 mw n 1150 mw 9.2 mw/ c 736 mw e 3 in the fk and j packages, sn55121 chips are either silver glass or alloy mounted. recommended operating conditions sn55121 sn75121 unit min nom max min nom max unit supply voltage, v cc 4.75 5 5.25 4.75 5 5.25 v high-level input voltage, v ih 2 2 v low-level input voltage, v il 0.8 0.8 v high-level output current, i oh 75 75 ma operating free-air temperature, t a 55 125 0 70 c
sn55121, sn75121 dual line drivers slls074c september 1973 revised may 1998 4 post office box 655303 ? dallas, texas 75265 electrical characteristics over recommended ranges of supply voltage and operating free-air temperature range (unless otherwise noted) parameter test conditions min max unit v ik input clamp voltage v cc = 5 v, i i = 12 ma 1.5 v v (br) breakdown voltage v cc = 5 v, i i = 10 ma 5.5 v v oh high-level output voltage v ih = 2 v, i oh = 75 ma, see note 2 2.4 v i oh high-level output current v cc = 5 v, t a = 25 c, v ih = 4.5 v, see note 2 v oh = 2 v, 100 250 ma i ol low-level output current v il = 0.8 v, v ol = 0.4 v, see note 2 800 m a i o(off) off-state output current v cc = 3 v, v o = 3 v 500 m a i ih high-level output current v i = 4.5 v 40 m a i il low-level output current v i = 0.4 v 0.1 1.6 ma i os short-circuit output current 2 v cc = 5 v, t a = 25 c 30 ma i cch supply current, outputs high v cc = 5.25 v, all inputs at 2 v, outputs open 28 ma i ccl supply current, outputs low v cc = 5.25 v, all inputs at 0.8 v, outputs open 60 ma 2 not more than one output should be shorted at a time. note 2: the output voltage and current limits are valid for any appropriate combination of high and low inputs specified by the function table for the desired output. switching characteristics, v cc = 5 v, t a = 25 c parameter test conditions min typ max unit t plh propagation delay time, low-to-high level output r l =37 w c l =15 p f see figure 1 11 20 ns t phl propagation delay time, high-to-low level output r l = 37 w , c l = 15 pf , see fig u re 1 8 20 ns t plh propagation delay time, low-to-high level output r l =37 w c l = 1000 p f see figure 1 22 50 ns t phl propagation delay time, high-to-low level output r l = 37 w , c l = 1000 pf , see fig u re 1 20 50 ns parameter measurement information 5 ns 0 v v oh v ol 3 v 5 ns input 10% 1.5 v 90% t plh output t phl voltage waveforms 1.5 v 1.5 v 10% 1.5 v 90% test circuit output 3 v v cc r l c l (see note b) pulse generator (see note a) notes: a. the pulse generator has the following characteristics: z o 50 w , t w = 200 ns, duty cycle 50%, prr 500 khz. b. c l includes probe and jig capacitance. figure 1. test circuit and voltage waveforms
sn55121, sn75121 dual line drivers slls074c september 1973 revised may 1998 5 post office box 655303 ? dallas, texas 75265 typical characteristics 0 io output current ma v o output voltage v 300 5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 50 100 150 200 250 output current vs output voltage i o v cc = 5 v v ih = 2 v t a = 25 c figure 2
sn55121, sn75121 dual line drivers slls074c september 1973 revised may 1998 6 post office box 655303 ? dallas, texas 75265 application information 75- w coaxial cable 1/3 sn55122 1/3 sn55122 1/3 sn55122 1/2 sn55121 1/2 sn55121 1/2 sn55121 75- w coaxial cable cable 75- w coaxial 1/2 sn55121 75 w 75 w 75 w 75 w figure 3. single-ended party-line circuits
package option addendum www.ti.com 10-jun-2014 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish (6) msl peak temp (3) op temp (c) device marking (4/5) samples sn55121j obsolete cdip j 16 tbd call ti call ti -55 to 125 SN75121D obsolete soic d 16 tbd call ti call ti 0 to 70 sn75121n active pdip n 16 25 pb-free (rohs) cu nipdau n / a for pkg type 0 to 70 sn75121n sn75121nsr active so ns 16 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim 0 to 70 sn75121 snj55121fk obsolete lccc fk 20 tbd call ti call ti -55 to 125 snj55121j obsolete cdip j 16 tbd call ti call ti -55 to 125 (1) 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. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent 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 0.1% 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 1) lead-based flip-chip solder bumps used between the die and package, or 2) 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 0.1% by weight in homogeneous material) (3) msl, peak temp. - the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) 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.
package option addendum www.ti.com 10-jun-2014 addendum-page 2 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. 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. other qualified versions of sn55121, sn75121 : ? catalog: sn75121 ? military: sn55121 note: qualified version definitions: ? catalog - ti's standard catalog product ? military - qml certified for military and defense applications
important notice texas instruments incorporated and its subsidiaries (ti) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per jesd46, latest issue, and to discontinue any product or service per jesd48, latest issue. buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. all semiconductor products (also referred to herein as ? components ? ) are sold subject to ti ? s terms and conditions of sale supplied at the time of order acknowledgment. ti warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in ti ? s terms and conditions of sale of semiconductor products. testing and other quality control techniques are used to the extent ti deems necessary to support this warranty. except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. ti assumes no liability for applications assistance or the design of buyers ? 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s goal is to help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and requirements. nonetheless, such components are subject to these terms. no ti components are authorized for use in fda class iii (or similar life-critical medical equipment) unless authorized officers of the parties have executed a special agreement specifically governing such use. only those ti components which ti has specifically designated as military grade or ? enhanced plastic ? are designed and intended for use in military/aerospace applications or environments. buyer acknowledges and agrees that any military or aerospace use of ti components which have not been so designated is solely at the buyer ' s risk, and that buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use. ti has specifically designated certain components as meeting iso/ts16949 requirements, mainly for automotive use. in any case of use of non-designated products, ti will not be responsible for any failure to meet iso/ts16949. products applications audio www.ti.com/audio automotive and transportation www.ti.com/automotive amplifiers amplifier.ti.com communications and telecom www.ti.com/communications data converters dataconverter.ti.com computers and peripherals www.ti.com/computers dlp ? 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