SN74AHCT139PWR

Series:	74AHCT
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Decoder/Demultiplexer
Circuit:	1 x 2:4
Independent Circuits:	2
Current - Output High, Low:	8mA, 8mA
Voltage Supply Source:	Single Supply
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	16-TSSOP
Base Part Number:	74AHCT139

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Logic - Signal Switches, Multiplexers, Decoders

Signal switches, multiplexers, decoders are essential components of digital electronic systems. They allow the selective activation and deactivation of the signals fed to them. This allows the system to be configured and adjusted to different scenarios, or to process different types of data information. They are amongst the most widely used components in digital systems, and have multiple applications ranging from data processing to communication networks.The SN74AHCT139PWR is a high-speed quadruple bus-select decoder. It is one of many similarly structured switch products available, and as such it serves as an excellent example of the general category of logic-signal switches, multiplexers, decoders. The SN74AHCT139PWR has been designed especially for use in high-speed applications, and is manufactured from an array of complementary high-speed MOS Silicon Gate transistors.This device features four separate address terminals, which allow for selection between four separate output channels. It employs a 3:8 decoder configuration to allow for more flexibility and control over the outputs, and its speed is in the range of 8.0 to 10.0 nanoseconds maximum propagation delay. The outputs remain active in either high- or low-impedance state; thus the SN74AHCT139PWR can be used to drive any logic family.Its application field ranges from address decoding and multiplexing, to communications system to chroma effects, in audio and video signal processing. The SN74AHCT139PWR is also ideal for selecting and routing signals for channels, columns and rows in memory application, and is especially useful for interfacing segments in multiple-nibble-wide memories.The SN74AHCT139PWR is an active high-voltage energized device: when power is applied, the output is active. Alternatively, the chip has an internal signal system designed in to its circuitry which can be enabled to determine the logic signal level at the outputs, which may be a "1" or "0". This feature eliminates the need for external control signals.At the heart of the device lies its design structure. Its internal circuit is based around the traditional 2-stage decoding structure, consisting of input gates, address buffers and decoding blocks. This structure is called a “2-stage address decoder” because it uses two separate stages of logic -- one to decode the signals, and the other to trigger an output based on the results of the decoding stage. This provides the necessary speed and accuracy required in processing multiple signals. The primary benefit of the SN74AHCT139PWR is that it allows for the integrated decoding and processing of signals. This allows for a much more simplified circuit design than would otherwise be possible. The input signals can be received from a variety of sources, and are buffered, filtered and processed within the circuit structure. In essence, the device simplifies the design process and reduces the need for individual discrete and larger components.Moreover, this chip features low power and low noise features, making it an ideal choice for many switching and decoding applications. The power dissipation is about 3.4 mW per output and the current supply is about 10Na. Additionally, its switching noise immunity is increased due to its high-impedance inputs and its isolated output transistors. Overall, the SN74AHCT139PWR is a highly versatile and reliable logic device that has a vast number of applications. Its advantage lies in its ease of use and extremely fast response time, and its ability to reliably process and route signals. Its prominence and success as a digital switch is due to its overall design and construction, and its ability to process multiple signals, offer a range of connection options, and be compatible with most logic families.

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