? semiconductor components industries, llc, 2001 october, 2001 rev. 7 1 publication order number: sn74ls670/d sn74ls670 4 x 4 register file with 3-state outputs the ttl/msi sn74ls670 is a high-speed, low-power 4 x 4 register file organized as four words by four bits. separate read and write inputs, both address and enable, allow simultaneous read and write operation. the 3-state outputs make it possible to connect up to 128 outputs to increase the word capacity up to 512 words. any number of these devices can be operated in parallel to generate an n-bit length. ? simultaneous read/write operation ? expandable to 512 words by n-bits ? typical access time to 20 ns ? 3-state outputs for expansion ? typical power dissipation of 125 mw guaranteed operating ranges symbol parameter min typ max unit v cc supply voltage 4.75 5.0 5.25 v t a operating ambient temperature range 0 25 70 c i oh output current high 2.6 ma i ol output current low 24 ma low power schottky soic d suffix case 751b plastic n suffix case 648 16 1 16 1 device package shipping ordering information sn74ls670n 16 pin dip 2000 units/box sn74ls670d soic16 38 units/rail sn74ls670dr2 soic16 2500/tape & reel http://onsemi.com
sn74ls670 http://onsemi.com 2 connection diagram dip (top view) data inputs write address inputs write enable (active low) input read address inputs read enable (active low) input outputs d 1 - d 4 w a , w b e w r a , r b e r q 1 - q 4 0.5 u.l. 0.5 u.l. 1.0 u.l. 0.5 u.l. 1.5 u.l. 65 u.l. 0.25 u.l. 0.25 u.l. 0.5 u.l. 0.25 u.l. 0.75 u.l. 15 u.l. notes: a) 1 ttl unit load (u.l.) = 40 a high/1.6 ma low. high low (note a) loading pin names logic symbol note: the flatpak version has the same pinouts (connection diagram) as the dual inline package. 14 13 12 11 10 9 123456 7 16 15 8 v cc d 2 d 1 w a w b e w q 1 e r q 2 d 3 d 4 r b r a q 4 q 3 gnd v cc = pin 16 gnd = pin 8 14 13 5 4 12 15 1 2 3 11 10 9 7 6 w a w b r a r b e w e r d 1 d 2 d 3 d 4 q 1 q 2 q 3 q 4
sn74ls670 http://onsemi.com 3 logic diagram 14 1 2 67 3 4 5 9 11 12 10 13 15 v cc = pin 16 gnd = pin 8 = pin numbers gd q gd q gd q gd q gd q gd q gd q gd q gd q gd q gd q gd q gd q gd q gd q gd q word 0 word 1 word 2 word 3 d 4 d 3 d 2 d 1 q 4 q 3 q 2 q 1 r a e r r b w a w b e w
sn74ls670 http://onsemi.com 4 dc characteristics over operating temperature range (unless otherwise specified) limits symbol parameter min typ max unit test conditions v ih input high voltage 2.0 v guaranteed input high voltage for all inputs v il input low voltage 0.8 v guaranteed input low voltage for all inputs v ik input clamp diode voltage 0.65 1.5 v v cc = min, i in = 18 ma v oh output high voltage 2.4 3.1 v v cc = min, i oh = max, v in = v ih or v il per truth table v ol out p ut low voltage 0.25 0.4 v i ol = 12 ma v cc = v cc min, v in v il or v ih v ol output low voltage 0.35 0.5 v i ol = 24 ma v in = v il or v ih per truth table i ozh output off current high 20 m a v cc = max, v o = 2.7 v i ozl output off current low 20 m a v cc = max, v o = 0.4 v i ih input high current d, r, w e w e r 20 40 60 m a v cc = max, v in = 2.7 v i ih d, r, w e w e r 0.1 0.2 0.3 ma v cc = max, v in = 7.0 v i il input low current d, r, w e w e r 0.4 0.8 1.2 ma v cc = max, v in = 0.4 v i os short circuit current (note 1) 30 130 ma v cc = max i cc power supply current 50 ma v cc = max note 1: not more than one output should be shorted at a time, nor for more than 1 second.
sn74ls670 http://onsemi.com 5 ac characteristics (t a = 25 c) limits symbol parameter min typ max unit test conditions t plh t phl propagation delay, r a or r b to output 23 25 40 45 ns t plh t phl propagation delay, e w to output 26 28 45 50 ns v cc = 5.0 v, t plh t phl propagation delay, data to output 25 23 45 40 ns v cc = 5 . 0 v , c l = 45 pf t pzh t pzl output enable time 15 22 35 40 ns t plz t phz output disable time 16 30 35 50 ns c l = 5.0 pf ac setup requirements (t a = 25 c) limits symbol parameter min typ max unit test conditions t w pulse width 25 ns t s setup time, (d) 10 ns t s setup time, (w) 15 ns v cc =50v t h hold time, (d) 15 ns v cc = 5.0 v t h hold time, (w) 5.0 ns t rec recovery time 25 ns ac waveforms figure 1. figure 2. figure 3. 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v r a , r b q q d, e w w a , w b d e w t s t h t h t s t w t phl t plh t phl t plh
sn74ls670 http://onsemi.com 6 package dimensions n suffix plastic package case 64808 issue r notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension l to center of leads when formed parallel. 4. dimension b does not include mold flash. 5. rounded corners optional. a b f c s h g d j l m 16 pl seating 18 9 16 k plane t m a m 0.25 (0.010) t dim min max min max millimeters inches a 0.740 0.770 18.80 19.55 b 0.250 0.270 6.35 6.85 c 0.145 0.175 3.69 4.44 d 0.015 0.021 0.39 0.53 f 0.040 0.70 1.02 1.77 g 0.100 bsc 2.54 bsc h 0.050 bsc 1.27 bsc j 0.008 0.015 0.21 0.38 k 0.110 0.130 2.80 3.30 l 0.295 0.305 7.50 7.74 m 0 10 0 10 s 0.020 0.040 0.51 1.01
sn74ls670 http://onsemi.com 7 package dimensions d suffix plastic soic package case 751b05 issue j notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. 18 16 9 seating plane f j m r x 45 g 8 pl p b a m 0.25 (0.010) b s t d k c 16 pl s b m 0.25 (0.010) a s t dim min max min max inches millimeters a 9.80 10.00 0.386 0.393 b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.054 0.068 d 0.35 0.49 0.014 0.019 f 0.40 1.25 0.016 0.049 g 1.27 bsc 0.050 bsc j 0.19 0.25 0.008 0.009 k 0.10 0.25 0.004 0.009 m 0 7 0 7 p 5.80 6.20 0.229 0.244 r 0.25 0.50 0.010 0.019
sn74ls670 http://onsemi.com 8 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. sn74ls670/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com n. american technical support : 8002829855 toll free usa/canada
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