74156 NSC | Alldatasheet
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| 196 i T-66-21-53 F ° CONNECTION DIAGRAM . PINOUT A ‘ 54/74156 ; 54LS/74LS156 4 G {38} Yee: DUAL 1-OF-4 DECODER/DEMULTIPLEXER tie mee (With Open-Collector Outputs) wit Fae . 6m (3 [#3) Ao j 9 [ia] Be Ou[e] [11] Om Be fF] [7a] Ow ono] {8} Sa LOGIC SYMBOL DESCRIPTION — The “156 contains two decoders with common Address (Ao, Aj) inpuls and separate enable gates. Decoder “a” has an enable gate 4 with one active HIGH and one active LOW inpul, while decoder “b” has two active LOW inputs. If the enable functions are satistied, one output of each 12 193 “ue E decoder will be LOW, as selected by the Address inputs. For functional . description, truth table and logic diagram, please refer to the '155 data sheet. C) u . ORDERING CODE: See Section 9 © WW. * COMMERCIAL GRAGE] —WIITARY GRADE Tpxq |[™oore**,. LI, mm—rey | PKGS Voo = +5.0 V +5%, Voc = +6.0 V +10%, eee) $e j TaA=O°Cto+70°C | Ta=-55°C to +126°C YYVY t t Plastic 7es 6 eon : Sra [+ fowaranwe | [| Ceramic Veo = Pin 16 Sea | « fowmamenee frwowrcna |] SeRt ee cad ec INPUT LOADING/FAN-OUT; See Section 3 for ULL. definitions 54/74 (UL) S4/TALS (ULL) Ao, Ay Address Inputs 1.9/1.0 0.6/0.25 Es, E> Enable Inputs (Active LOW) 1.0/1.0 0,5/0.25 i Es Enable input (Activa HIGH) 1.0/1.0 0,5/0.25 Op —Bs Outputs (Active LOW) oc*no OC'/5.0 (2.5) *OC— Open Collector 1240 €-03 4208 SY F6-/X
. T-66-21-53 196 | Fi DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE [unless otherwise specilied : i [_xm_| Veo=Max; Es. > = GND : kee Power Supply Current F-Ye—] Ao, At, Ea=4.5 V AC CHARACTERISTICS: Vcc = 5.0 V, Ta = 25°C (See Section 3 for waveforms and load configurations) | , SYMBOL Cy =15 pF |C. = 15 pF) UNITS CONDITIONS A, = 400 2 | RL 2kn . a a Propagation Delay 23 . PLU Propagation Delay jj [ec_[ewerer |] | rm onee i | 1241 €-04 4209 S7/56-2 x