SN74AS867DWRE4

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The SN74AS867DWRE4 is a dual 8-bit programmable divider and counter that implements frequency multiplication, divide-by-N counter, and programmable modulus N dividers from a single device. The SN74AS867DWRE4 is part of the widely used Texas Instruments “74F” family of CMOS logic ICs, widely preferred for its stable performance and affordability. The device is also known as a high-speed universal counter/divider, since it can be used to implement a wide variety of applications, including frequency-division, frequency-multiplication, digital decoupling, and pulse-width modulation. The device features two independently programmable counters, allowing it to perform multiple functions simultaneously.

The SN74AS867DWRE4 is ideal for a number of different applications, including digital decoupling, frequency division, frequency multiplication, timer/counter, pulse-width modulation, and digital error-correction systems. The device is well suited for motor control applications due to its ability to create remain-on or off times of up to 256 cycles. In addition, its high operating speed of up to 74 MHz makes it suitable for high-resolution pulse-width modulation systems. Other applications include RF frequency synthesizers, pitch-correction systems, and AM/FM demodulators.

The device has a wide range of programmable inputs and outputs that enables it to be used for various logic functions. For instance, it can be used to generate a pulse-width modulation signal at a particular frequency from an audio or other input signal. It can also generate a pulse train at a given frequency. The device also features a latch that can be programmed to produce either positive or negative edges. The device also features a power on reset function, which allows the counter to reset itself during power-up.

The SN74AS867DWRE4 is based on a cascaded counter topology, which makes it ideal for applications requiring very high speeds. Each of the two counters is clocked by an external clock, which supplies the synchronisation signal for each counter\'s high speed operations. The device also has asynchronous control lines, which allows the counters to be configured to operate independently.

The SN74AS867DWRE4 features a wide range of programmable features, including a programmable divide-by-N counter, programmable arithmetic unit, programmable modulus N dividers, and programmable frequency multipliers. The device also features two on-chip power-on reset detectors. The device also features a voltage reset circuit, which can detect input voltage changes and reset the counters accordingly.

In addition, the SN74AS867DWRE4 features an integrated level-sensitive latch, which can be used to program the device\'s outputs. The latch can be used to program the counter\'s outputs to produce either active high or active low signals. It can also be used to produce predetermined delay times between active and inactive states of the counter\'s outputs.

The device also features an integrated oscillator, which can be used to generate a clock signal or provide frequency multiplication or division. The device also has an on-chip data buffer, which allows the counters to be clocked directly from the device\'s output. Lastly, the SN74AS867DWRE4 features a programmable register, which allows the user to store various data values, mask values, and parameters into the device.

The SN74AS867DWRE4 is an ideal choice for a wide variety of applications that require logic counter, divider, and frequency-multiplication capabilities. Its wide range of features makes it an incredibly versatile device, allowing it to be used in a variety of applications. Its highly integrated design also makes it ideal for simplifying the implementation of logic functions, significantly reducing the cost and design time of an application.

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