158 54138 /74138 3-Line-to-8-L.ine Decoder FAIL typical values are at Vog= SV. Ta =25C Not more than one oulpul should be shorted at a time, and duration of the short-circuit test should not exceed one second {p_H=propagation delay time, |cw-to-high-level output 'PHL propagation delay ume, h gh-to-low-level output Schottky TTL High-Speed TTL Low-Power Schottky TTL Standard TTL Low-Power TTL. _- oo _ a ee eee == Package Package Package Package . Package Device Type + =1-7_] Device Type Device Type 1 Device Type =7--1--4 Device Type - - c| P| MIcFI c| P| m|cF C| P{MicF c| P[MIcr| -c|P|MIcF] Tl SN54S138 ba Wil J] SNsausi3g0 Jy we _ | _ | . ~ SN74S138 JANG) SN74L S138 JfNi ti : | | 7Fwgasize | 0@ Fusaisi3a Faisi3s | OG: , ' _ FAIRCHILD rasise Fem] OD oT TTY reraisige, roaisise fe] Pa ' = _ a pep 4.4 MOTOROLA SN 74L 5138 Pon i DM7A4L $138 Ms . ~ | _ i ato. | NS.C. DM?4S 138 Loe 1 DMdaL S138 up Lo ; + + ; [ . | | a | PHILIPS NTS 138 yt 7 [NTL S138 ep , TT Tt SIGNETICS $545 138 FudBu we | _ : i | . TC _ | N74S 138 FufBe N74L $138 Aus | T SIEMENS | - . J - - }-~L~. oe } _ va -. FUJITSU 74 $138 Mi) | HITACHI [ T HDT4L $138 Pa T i MTSUBISH| M74S 138 Pa ~ M74L $138 Pa ~T en TC Te NEC TALS 138 i 1 Ts T T TT TOSHIBA |- ++ Tt ; To Ee Electrical Characteristics SN54LS138/SN74LS138 Pin Assignment. (Top View) absolute maximum ratings over operating a DATAOUTPUTS free-air temperature range Yoo yo YY? 3 YA YS YO Supply voltage. Voog - - Vv Operating free-a SNSALS ~SS'C to 125C 9 ingut voltage Ww temperature range | SN7ALS { dCto 76C L [ Storage temperature range | - 68C to 150C recommended operarating conditions SN5S4LS 138 positive logic: T Supply voltage, Voc _ 7 see function table High-level outp:.t current. Ioy L Low-level output current, IoL Ce Operating free-air temperature, T,, 55 125 | 0 70] C electrical characteristics over recommended operating SELEGT ENABLE free-air temperature range 7 Function Table PARAMETER * TEST CONDITIONS tf MIN TYP MAX | UNIT S138 LS138 Vin High-level input voltage 2 v [ Yu Low-level input voltage oa{ Vv INPUTS ouTPUTS < Input clamp voltage Vou MIN, = 18mA 15] Vv ee SELECT y High-level output vol Voc=MIN, Vi 2V, | SNS | 2.5 34 y 5 I 2) C : A YO Yi 2 Y3 Y4 YS Y6 Y? igh-level output voltage OH @ 9 Vit=0.8V,IOH- 400A} SN7ALS | 2.7 3.4 L M[ Xx xX) H HOH HOH HOH OH Voo=MIN, Vyj=2V, x |x % xX |]H H H H H H HH VoL Cow-level output voltage 0.35 0.5 v H L Cok i Lo oR OH HH HHH Vi =0.8V. Igp = 8MA \ Input current at maximum Vec=MAX. Vy-av oil mA 4 L pu Lo H)H L HH HH HOH input voltage ce My yy H blob oH LL] H H LH HH H H 1m High-level input current Voc =MAX, Wy=2.7V 20 | A Hq Ly) tH HY) H HOH LOH HOH H aL Low-level input current Vog=MAX, V/=0.4v 0.4] mA H Uy H LL | KH HH H LH HOH 19S Short-cwreutoutput current | Vog=MAX 20 100, mA H LPH G Hy H HOH HH t HOH loo. Supply cuwrnt Voc= MAX, Outputs enabied 6a 0) ma H LYRA WH LH H KH OH HOH LOH and open H tL }H oH HH H H HH HAL 1PLH 13 20 ns * G2-G2A+G2B 'PHt | frum Binary select 27 4l H=high level. ( =low level, X - irrelevant 'PLH | to Any output Voc 5V, 1827 : : [ 37) 8 Diagram PHL Tae 2 39 Functional Block g . 18 eu CL =I15pF, s = PHL! trom Enable Rue 2ks: 'PLH | Sy out 7 26] a tpn |" y outou 2 |B ENABLE INPUTS sot L, i { + inf DATA ; 4 } 4] OUTPUTS 1 4 i i Ue 1 +- aA LE a4 Y Det 4 we SELECT 2s > _ CRITE Ly g INPUTS 8 +: {> : i L. : Y? 0 fe hd *$138LS138 DECODER DEMULTIPLEXER t For conditions shown as MIN or MAX, use the appropriate value specitied under recommended operating conditions for the applicable device type