74ACT139

HD74AC139/HD74ACT139 Dual 1-of-4 Decoder/Demultiplexer Description The HD74AC139/HD74ACT139 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 HD74AC139/HD74ACT139 can be used as a function generator providing all four minterms of two variables. Features • • • • • Multifunction Capability Two Completely Independent 1-of-4 Decoders Active Low Mutually Exclusive Outputs Outputs Source/Sink 24 mA HD74ACT139 has TTL-Compatible Inputs HD74AC139/HD74ACT139 Pin Arrangement Ea 1 A0a 2 A1a 3 O0a 4 O1a 5 O2a 6 O3a 7 GND 8 (Top view) 16 VCC 15 Eb 14 A0b 13 A1b 12 O0b 11 O1b 10 O2b 9 O3b Logic Symbol E A0 A1 E A0 A1 DECODER a DECODER b O0 O1 O2 O3 O0 O1 O2 O3 Pin Names A0, A1 E O0 to O 3 Address Inputs Enable Inputs Outputs 2 HD74AC139/HD74ACT139 Logic Diagram Ea A0a A1a Eb A0b A1b O0a O1a O2a O3a O0b O1b O2b O3b Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Functional Description The HD74AC139/HD74ACT139 is a high-speed dual 1-of-4 decoder/demultiplexer. The device has two independent decoders, each of which accepts two binary weighted inputs (A 0 to A1) and provides four mutually exclusive active-Low outputs ( O0 to O3). Each decoder has an active-Low enable (E). When E is High all outputs are forced High. The enable can be used as the data input for a 4-output demultiplexer application. Each half of the HD74AC139/HD74ACT139 generates all four minterms of two variables. These four minterms are useful in some applications, replacing multiple gate functions as shown in Figure a, and thereby reducing the number of packages required in a logic network. Truth Table Inputs E H L L L L H: L: X: A0 X L H L H High Voltage Level Low Voltage Level Immaterial A1 X L L H H Outputs O0 H L H H H O1 H H L H H O2 H H H L H O3 H H H H L 3 HD74AC139/HD74ACT139 Figure a: Gate Functions (each half) E A0 A1 E A0 A1 E A0 A1 E A0 A1 O3 O2 O1 O0 E A0 A1 E A0 A1 E A0 A1 E A0 A1 O3 O2 O1 O0 DC Characteristics (unless otherwise specified) Item Maximum quiescent supply current Maximum quiescent supply current Maximum ICC/input (HD74ACT139) Symbol I CC I CC I CCT Max 80 8.0 1.5 Unit µA µA mA Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25°C VIN = VCC – 2.1 V, VCC = 5.5 V Ta = Worst case 4 HD74AC139/HD74ACT139 AC Characteristics: HD74AC139 Ta = +25°C CL = 50 pF Item Propagation delay An to On Propagation delay An to On Propagation delay En to On Propagation delay En to On Note: t PHL t PLH t PHL Symbol t PLH VCC (V)*1 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 1. Voltage Range 3.3 is 3.3 V ± 0.3 V Voltage Range 5.0 is 5.0 V ± 0.5 V Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Typ 8.0 6.5 7.0 5.5 9.5 7.0 8.0 6.0 Max 11.5 8.5 10.0 7.5 12.0 8.5 10.0 7.5 Ta = –40°C to +85°C CL = 50 pF Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 13.0 9.5 11.0 8.5 13.0 10.0 11.0 8.5 ns ns ns Unit ns AC Characteristics: HD74ACT139 Ta = +25°C CL = 50 pF Item Propagation delay An to On Propagation delay An to On Propagation delay En to On Propagation delay En to On Note: Symbol t PLH t PHL t PLH t PHL VCC (V)*1 5.0 5.0 5.0 5.0 Min 1.0 1.0 1.0 1.0 Typ 6.0 6.0 7.0 7.0 Max 8.5 9.5 10.0 9.5 Ta = –40°C to +85°C CL = 50 pF Min 1.0 1.0 1.0 1.0 Max 9.5 10.5 11.0 10.5 Unit ns ns ns ns 1. Voltage Range 5.0 is 5.0 V ± 0.5 V Capacitance Item Input capacitance Power dissipation capacitance Symbol CIN CPD Typ 4.5 40.0 Unit pF pF Condition VCC = 5.5 V VCC = 5.0 V 5 19.20 20.00 Max 16 9 7.40 Max 6.30 Unit: mm 1 1.3 1.11 Max 8 0.51 Min 2.54 Min 5.06 Max 7.62 2.54 ± 0.25 0.48 ± 0.10 0.25 – 0.05 0° – 15° Hitachi Code JEDEC EIAJ Weight (reference value) + 0.13 DP-16 Conforms Conforms 1.07 g Unit: mm 10.06 10.5 Max 16 9 5.5 1 *0.22 ± 0.05 0.20 ± 0.04 8 0.80 Max 2.20 Max 0.20 7.80 + 0.30 – 1.15 0° – 8° 0.70 ± 0.20 1.27 *0.42 ± 0.08 0.40 ± 0.06 0.12 M Hitachi Code JEDEC EIAJ Weight (reference value) FP-16DA — Conforms 0.24 g *Dimension including the plating thickness Base material dimension 0.10 ± 0.10 0.15 Unit: mm 9.9 10.3 Max 16 9 3.95 1 1.27 0.635 Max 8 0.11 0.14 + 0.04 – 1.75 Max *0.22 ± 0.03 0.20 ± 0.03 0.10 6.10 + 0.30 – 1.08 0° – 8° 0.67 0.60 + 0.20 – *0.42 ± 0.08 0.40 ± 0.06 0.15 0.25 M *Dimension including the plating thickness Base material dimension Hitachi Code JEDEC EIAJ Weight (reference value) FP-16DN Conforms Conforms 0.15 g Unit: mm 5.00 5.30 Max 16 9 4.40 1 0.08 *0.22 + 0.07 – 8 0.65 1.0 6.40 ± 0.20 0° – 8° 0.50 ± 0.10 0.20 ± 0.06 0.13 M 0.65 Max *0.17 ± 0.05 0.15 ± 0.04 1.10 Max 0.10 0.07 +0.03 –0.04 *Dimension including the plating thickness Base material dimension Hitachi Code JEDEC EIAJ Weight (reference value) TTP-16DA — — 0.05 g Cautions 1. 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