346 54478 74478 Programmable Read-Only Memories Os Schottky TTL | _High- Speed TTL Ih Low-Power wer Schottky 7 TTL Standard * TTL Low-Power TTL Package Package . Package |. | Packa __ | Package Device Type |--+ PIM icr Device Type ST MICr| Device Type | C aI see | Device Type C = se Device Type slp! a oe Tl i _ snsasaa ust ft fp el | uh SNTaLsave fs cine 7 7 7 ~ ion FAIRCHILD - mr fe nnn nen nes On TTT -T = pp MOTOROLA |: --- ---- +} }--+- 4-4 -. __ |. 4 t+ 7 { [ Ty | N.S.C a t 4+ -1-.f 4. | | , PHILIPS te] = wee ate ff - SIGNETICS i | a a oop apo eo ST en fot tf SIEMENS Tor mnt eee I - . Tr - _ =a a FUJITSU +4 Pa t To {o ToT HITACHI [oop || t + C 1 Jo {ofp ft ' | MITSUBISHI +4 1 NEC po r TOSHIBA i+} = + Electrical Characteristics SN54LS478/SN74LS478 absolute maximum ratings over operating free-air temperature range temperature range fun PARAMETER _ 1H High level input voltage. Susply voltage [__W_[oftstate peak output voltage | 17.25V lnput_vol V5. Operating tree-ar SNS54LS BEC to 125 nen ON 54LS) select poak input IV | temperature range SN74LS OT to 70T _Ofstat state output voltage 5.5u | Storage temperature range -65C to 150T recommended operating < conditions - MIN NOM MAX UNIT ADH Supply voltage, V Sa Famiy| 45 5 5.5] aoc upply voltage, Family | PPI ge. Vee _ 74 Family | 4.75 5 5.25 ADF 54 Family = aoe High-level oulput current, 1H mA ADO 7 To ADC Low level output current, | * t ADB ver oulp OL 4 Family ne - eect - ADA 54 Family Operating free-au temperature range = 01 nn __ __ La Family | b02 electrical characteristics over recommended operating free-air 503 GND less otherwise noted) TEST CONDITIONS + Voc =MIN. | Pin Assignment *LS478 (Top 2 View) Yec ADt ADJ St $2 $3 s4 008 007 006 905 13 004 @No- more than one output should be ViK pul clamp voltage We _18mA v MIN, Viq =2, Vou High-level output voltage ce We v Vit 0.8V. lo * MAX | eee OO Veg MIN, a ce : 54 Family 05 v Low-level output voltage Vin 2V. v ow-level output vo ___ a Ov , Vii 0.8V | 174 Family O58 _ lon Max Lo . 7 Ott-state output current. {02H 50} uA high-level voltage apoled _ _ _ Ot state output current fozu 50] uA low-level voltage appiied | 4 input current at maymnum i I Vee MAX. Vv) 5.5V 1] ma Input voltage High-level input_current Tog "MAX, Vj >2.7V 25] uA Low-level input current Voc MAX, Vy 0.5V 250 | aA 1 Sho. fi i MAX $4 Famuy [10 100 | - -- = os output current ce 74 Family | 10_ 100 | " | \ s Vee MAX j 54 Famly A uppiy current - ~ m ce y 7 vec fre Family 72100 | switching characteristics over recommended ranges of Ta and Vcc (unless otherwise noted) | ____ oa poo - ta(ad) | ta(S), Access time Access time; tpxz TEST TYPE from | from chip select Disable tim | CONDITIONS _address | (enable time) _ a : MIN TYP MAX MIN TYP ne MIN 7 TYP MAX . oF tor Ls 15a Famiy, & 175 135 J 'a.ad} and fal} 478 i CL SOF for? {. fe 4 ns 74 Famsly. + m2 85 130 55 go | 50 Ts [See fsgure 3 | i = conditions shown as MIN or MAX, use the approprate value specified under recommended operating conditions. TAU typwal values are at Vog -5V. Ta 25 shorted at a time, and duration of the short circuit shouid not exceed one second