SN74HC158PWR

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The SN74HC158PWR is an integrated circuit (IC) chip used in numerous electronic applications. It is a quad 2-to-1 multiplexer with schmitt-trigger inputs and is classified as a logic-signal switch. SN74HC158PWR is a medium-speed, low-power device best suited for applications ranging from medium-high speed logic to low power applications, such as multiplexers, decoders, address selectors or data selectors. In addition, the SN74HC158PWR IC is designed for low-power systems.

The SN74HC158PWR is a CMOS form IC that allows a user to select one of four input signals and to output the result on one line, with the aim being to reduce the number of electronic components used in an application. To that end, this IC is incredibly useful in selecting multiple data input sources. Such sources include modern digital devices such as computers, TVs, DVD players, and recording systems.

The SN74HC158PWR IC works on the principle “TRUE / COMPLEMENTED”, meaning the output will be ” TRUE” if the selected data inputs are all ” TRUE” , and ” COMPLEMENTED” otherwise. Basically the device has four independent 2-input multiplexers, each having two active-low enable inputs and one active-high data select inputs. The four data select inputs (S1, S2, S3, S4) are used to select one of the four data inputs.

The symbol for the SN74HC158PWR is shown in Figure 1. The “Y” symbol represent the output pins, and the “A, B, C, D” and “S1, S2, S3, S4” symbols represent the data input and data select pins, respectively. The “GND” signifies the ground pin and the “VCC” signifies the power/voltage pin.

Figure 1: Symbol of SN74HC158PWR IC

The voltage levels for the SN74HC158PWR feature a wide operating range of 0 – 8V with a supply voltage of 3 – 15V. The device has an operating temperature range of -40°C to 85°C. The device is also equipped with hysteresis which helps to eliminate false triggering. It also provides wide noise immunity. The power consumption of the device is approximately 0.8mA.

The SN74HC158PWR is available in the 8-Pin unit in the orderable part number of 74HC158PWR. The SN74HC158PWR integrated circuit chip is extremely useful and versatile in situations in which a number of data input sources need to be quickly and easily switched or multiplexed.

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