268 4279/ 74279 Quadruple S-R Latch free-air temerature range PARAMETER TEST CONDITIONS ft MIN TYPE MAX | UNIT Vin High-level input voltage 2 Vv Vin Low-level input voltage 0.8 Vv VI Input clamp voitage VOC=MAX, ij) =l8mA 1.5 v Vou High-level output voltage VOC=MIN, Vin= 2V. 2.7 3.4 Vv . . Vu 50.8. LoHs ade A Vor Low-level output voltage we Dav. aa an 0.35 0.5] V " Input current at maximum input Voo=MAX, Vi =v 01 mA voltage lw High-level input current Voc =MAX, Vi =2.7V 20 { 2A ha Low-level input current Voo=MAX, Vr -0.4V -0.4] mA | _SN54L S273 ~- 20 100 los Short-gireuit output current Yoo = MAX SNT4L $279 730 00 mA lee Suppiy current Vec=MAX, See Note 3.8 7) mA tpl Propagation delay ume, low-to- 2 22 high-level output from S input Voom SV. tM. Propagation delay time. hign to- Ta =28C. 13 2! ns low-leve? output from S$ input CL =15pF, Propagation delay time, highi-to- AL = 2k 1PHL . = 15 27 low-level output fron R input 1 Pin Assignment 49 @ 352 35: (Top View) 3R 39 H = higt levet L = low tevel Schottky TTL High-Speed TTL Low-Power Schottky TTL Standard TTL Low-Power TTL Package Package Package Package Package Device Type Device Type Device Type Device Type Device Type C,P {MCF C|P [MCF C|P|MICF C|P|MICF Ci PIMICE Ti SNS4L S279 Jol | wef snsae79 Jp wat i SN74L $279 JpiN i IS N74279 J wyNa FM54is279,- Fwgisz79 | O@ FO FAIRCHILD FO7TALS2 79. FuaLS279 |O4I"| pa FQ} { FC74279.. FCaN279 OG | Pe FC) MOTOROLA SNTAL S279 Pd NS.C. | PHILIPS N74 $279 i N74279 4 $54279 Folea} wir SIGNETICS N74279 FpjBus Weds SIEMENS FUJITSU TAL S279 ma im HITACHI HO74_S$279 Pa HD74279 PC MITSUBISH M74L S279 Pal NEC 74L S279 ca TOSHIBA Electrical Characteristics SN541.S279/SN74LS279 absolute maximum ratings over operating free-air temperature range Supoly vollage. Voc v Operating free-air | SNSaLs See to 1250 . input voltage Vv temperature range [ SN74LS ae 10 WC Function Table I Storaye tammerature range 68 to Ist 279 recommended operating conditions SNS4LS279 SN74U5279 UNIT INPUTS | OUTPUT Min NOM MAK MIN NOM MAK str = a Supply voltage. Voo 45 s 5.5 475 5 5.28 v 5 R High-tevet output current. 1oy 400 400 an HOH Q9 ~ow-level output current. Ig, a a ma tL 4H H Operating free-air temperature. TA, 55 125 a 0 c H ok L A ae . LoL H* electrical characteristics over recommended operating Qg = the level of G before the indicated input conditions were established. *This output level is pseudo stable; that is, it may Not persist when the Sand R inputs return to their inactive (nigh) level. TF or tatches with doubie inputs: H = both inputs high L = one or both inputs tow t For conditions shown as MIN or MAX.use the appropriate value Specified under recommended operating conditions. PAI typical vaives are at Veo=5V,Ta=25'C. @Not more than one output should be shorted at a time, NOTE:iec 1s measured with ali FR inputs greunded all S inputs at 4.5V,and all outputs open.