M74HC139B1R

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The M74HC139B1R is an integrated circuit that can function as a logic switch. These components are widely used in multiplexing and decoding operations in digital electronics. It works by turning on or off one or more output signals based on the inputs provided. This is characterised by the device’s dual 2-line to 4-line decoder/demultiplexer logic function.

This device is packaged in the 14-pin Dual-In-Line Package format, and typically has a VCC range of 2.0 to 6.0 volts. When used in typical digital logic environment, the power source should range from a minimum of 2.7 volts, up to a maximum of 6 volts. Furthermore, when using the device as a decoder, the device logic low output is designed to sink up to 20 milliamps of current at 4.5 Volt.

The M74HC139B1R is designed to receive two binary signals externally encoded according to a 4-bit hexadecimal code, with the ability to generate 4 independent outputs from the 2-input decoder. This encodes a 4-bit quantity into two binary signals, which can be decoded to generate 4 independent outputs which can be used as control signals. The device also includes an active-low enable input which can be used to isolate and enable the device, allowing for flexible control of the signals.

The device also has an internal Schmitt-trigger circuit which allows for greater noise immunity in the input signals and improved noise margins in the output signals. This effect is especially useful for applications where the device is exposed to highly noisy environments. Noise immunity also reduces the overall power consumed in the circuit as the device does not need to process low-level noise signals.

The overall symbol of the M74HC139B1R device is a rectangular box containing the words “Address Decoder” on the top. Inside the box are four connectors, labeled A, B, E and O. A and B are the two binary inputs which are used to encode the 4-bit hexadecimal code. The E connector is used to enable or isolate the device, while the O connector is the output of the decoder.

In practical applications, the M74HC139B1R device is used in a variety of contexts, including address decoding applications. It is also used to reduce the noise sensitivity of the circuits of various implementation such as communications systems, industrial automation, and even in everyday consumer electronics like CD players and remote controllers. When used in such applications, the device’s Schmitt-trigger feature helps to reduce the sensitivity of the circuits to noise, improving system performance and reliability.

The M74HC139B1R is an excellent choice for projects that require a logic switch for multiplexing and decoding of digital signals. The device provides excellent noise immunity and its dual logic function makes it suitable for a wide variety of applications. With its low power consumption, it is an ideal choice for low-power systems. Its small size and ease of use make it a popular choice in many electronics projects.

The specific data is subject to PDF, and the above content is for reference