MC74AC139

MC74AC139, MC74ACT139 Dual 1-of-4 Decoder/Demultiplexer The MC74AC139/74ACT139 is a high−speed, dual 1−of−4 decoder/demultiplexer. The device has two independent decoders, each accepting two inputs and providing four mutually−exclusive active−LOW outputs. Each decoder has an active−LOW Enable input which can be used as a data input for a 4−output demultiplexer. Each half of the MC74AC139/74ACT139 can be used as a function generator providing four minterms of two variables. Features Multifunctional Capability Two Completely Independent 1−of−4 Decoders Active LOW Mutually Exclusive Outputs Outputs Source/Sink 24 mA ′ACT139 Has TTL Compatible Inputs These are Pb−Free Devices VCC Eb A0b A1b O0b O1b O2b O3b 16 15 14 13 12 11 10 9 12345678 Ea A0a A1a O0a O1a O2a O3a GND Figure 1. Pinout: 16−Lead Packages Conductors (Top View) PIN ASSIGNMENT PIN FUNCTION A0, A1 E Address Inputs Enable Inputs O0−O3 Outputs TRUTH TABLE Inputs E A0 A1 O0 HXX LLL LHL LLH LHH H L H H H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Outputs O1 O2 HH HH LH HL HH O3 H H H H L www.onsemi.com 16 1 16 1 MARKING DIAGRAMS 16 SOIC−16 D SUFFIX CASE 751B 1 xxx139G AWLYWW TSSOP−16 DT SUFFIX CASE 948F 16 xxx 139 ALYWG G 1 xxx = AC or ACT A = Assembly Location WL or L = Wafer Lot Y = Year WW or W = Work Week G or G = Pb−Free Package (Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions s...