CD74HC191M

Timing:	Synchronous
Base Part Number:	74HC191
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Voltage - Supply:	2V ~ 6V
Trigger Type:	Positive Edge
Count Rate:	35MHz
Series:	74HC
Reset:	--
Number of Bits per Element:	4
Number of Elements:	1
Direction:	Up, Down
Logic Type:	Binary Counter
Part Status:	Active
Packaging:	Tube

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

Introduction

CD74HC191M is an 8-bit up/down synchronous counter/divider which is used in electronic circuits. It is a type of semiconductor that falls under the category of Logic - Counters, Dividers. This device is used to count or divide a signal at frequencies up to 10 MHz. A CD74HC191M can be used for a variety of application fields, for example, for frequency division, digital signal processing, frequency division multiplexing (FDM), phase-locked loops (PLLs), ripple-carry addition/subtraction, and so on.

Application Fields

CD74HC191M can be employed for dividing a high-frequency clock signal into a lower-frequency signal. This is done by counting a given number of input pulses from the clock signal and then producing an output pulse after the full count has been reached. The device can be used for cycling through different frequencies, or when changing the pulse width of a signal. It is also an ideal choice for applications that use a large number of small signals with low switching times. The CD74HC191M can also be employed as a component of a timer circuit or for a wide variety of frequency division tasks.CD74HC191M is also an excellent choice for digital signal processing (DSP) applications, such as those where the signal needs to be divided into multiple, discrete parts. This device can be used to divide a high speed signal into a series of smaller pulses or to generate multiple clock signals. Furthermore, it can be used as a component in frequency division multiplexing (FDM), which is used to multiplex several signals onto one communication line. Furthermore, CD74HC191M can be used for generating fractional divider outputs for applications in phase-locked loops (PLLs).

Working Principle

CD74HC191M has eight data inputs, eight outputs, and a control input. The data inputs, which are labeled A through H, are all “high impedance” inputs, meaning they have very low current flow. The outputs (QA-QH) are all active-low, meaning they are active when the associated inputs are low. The device is powered by either two-level or three-level logic, meaning the inputs and outputs can be either “0” or “1”.The device operates by counting the number of clock pulses that are received through the clock (CLK) input. The counter counts up if the control input (U/D) is high and counts down if the control input (U/D) is low. The device produces one output pulse for each count, meaning that if the control input is high, the outputs go from 00 to 11 to 10 and so on. The device continues to increment the outputs until the count reaches the maximum (FFH) or the minimum (00H). When the count is at either of these extremes, the counter stops, and it can resume again when the control input is changed.

Conclusion

CD74HC191M is a commonly used type of semiconductor which is used in electronic circuits for counting and dividing a signal at frequencies up to 10MHz. This device can be used for a wide variety of applications, including digital signal processing, frequency division multiplexing, phase-locked loops, ripple-carry addition/subtraction, and more. The device has eight data inputs, eight outputs, and a control input. It functions by counting up or down a given number of input pulses from the clock signal. The device produces one output pulse for each count, meaning that if the control input is high, the outputs go from 00 to 11 to 10 and so on.

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

Part Number	Manufacturer	Price	Quantity	Description