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
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.
• Multifunctional Capability • Two Completely Independent 1–of–4 Decoders • Active LOW Mutually Exclusive Outputs • Outputs Source/Sink 24 mA • ′ACT139 Has TTL Compatible Inputs
description The ’AC139 devices are dual 2-line to 4-line decoders/demultiplexers designed for 1.5-V to 5.5-V VCC operation. These devices are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When used with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.
AC Types Feature 1.5-V to 5.5-V Operation and Balanced Noise Immunity at 30% of the Supply Voltage Buffered Inputs Incorporate Two Enable Inputs to Simplify Cascading and/or Data Reception Speed of Bipolar F, AS, and S, With Significantly Reduced Power Consumption Balanced Propagation Delays ±24-mA Output Drive Current – Fanout to 15 F Devices SCR-Latchup-Resistant CMOS Process and Circuit Design Exceeds 2-kV ESD Protection Per MIL-STD-883, Method 3015
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.
• Multifunction Capability • Two Completely Independent 1-of-4 Decoders • Active LOW Mutually Exclusive Outputs • Outputs Source/Sink 24 mA • ′ACT139 Has TTL Compatible Inputs
General Description The AC/ACT139 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 AC/ACT139 can be used as a function generator providing all four minterms of two variables.
Features ■ ICC reduced by 50% ■ Multifunction capability ■ Two completely independent 1-of-4 decoders ■ Active LOW mutually exclusive outputs ■ Outputs source/sink 24 mA ■ ACT139 has TTL-compatible inputs
General Description The AC/ACT139 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 AC/ACT139 can be used as a function generator providing all four minterms of two variables.
Features ■ ICC reduced by 50% ■ Multifunction capability ■ Two completely independent 1-of-4 decoders ■ Active LOW mutually exclusive outputs ■ Outputs source/sink 24 mA ■ ACT139 has TTL-compatible inputs
General Description The AC/ACT139 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 AC/ACT139 can be used as a function generator providing all four minterms of two variables.
Features ■ ICC reduced by 50% ■ Multifunction capability ■ Two completely independent 1-of-4 decoders ■ Active LOW mutually exclusive outputs ■ Outputs source/sink 24 mA ■ ACT139 has TTL-compatible inputs
General Description The AC/ACT139 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 AC/ACT139 can be used as a function generator providing all four minterms of two variables.
Features ■ ICC reduced by 50% ■ Multifunction capability ■ Two completely independent 1-of-4 decoders ■ Active LOW mutually exclusive outputs ■ Outputs source/sink 24 mA ■ ACT139 has TTL-compatible inputs
General Description The AC/ACT139 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 AC/ACT139 can be used as a function generator providing all four minterms of two variables.
Features ■ ICC reduced by 50% ■ Multifunction capability ■ Two completely independent 1-of-4 decoders ■ Active LOW mutually exclusive outputs ■ Outputs source/sink 24 mA ■ ACT139 has TTL-compatible inputs
General Description The AC/ACT139 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 AC/ACT139 can be used as a function generator providing all four minterms of two variables.
Features ■ ICC reduced by 50% ■ Multifunction capability ■ Two completely independent 1-of-4 decoders ■ Active LOW mutually exclusive outputs ■ Outputs source/sink 24 mA ■ ACT139 has TTL-compatible inputs