SN74LS697DW

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 SN74LS697DW is a monolithic integrated circuit incorporating three registers and a programmable, presettable counter that divides one signal by any number between 2 and 15 inclusive. A wide variety of pulse coded signal dividers can be constructed using this single device. It features an asynchronous reset input and multiple output options that allow both divide-by-N, and divide-by-N-1 functions. The chip contains three registers and a presettable, divide-by-N counter. Each register consists of a 4-bit storage latch and an encoding circuit to convert the binary information in the latch to the coded signal outputs. The coded outputs of the three registers are designated Q0 through Q7, with Q0 and Q4 having the least significant binary bit of the three registers and Q1 through Q7 having the second most significant bit. The three registers, in concert with the counter, allow a wide range of signal-counting or signal-dividing operations on any single logic supply.

The counter on the SN74LS697DW uses a programmable divide-by-N technique to generate pulses at prescribed intervals. The divide-by-N counter consists of a presettable up/down counter and a programmable 5:1 multiplexer. The first stage of the counter is a presettable up/down counter, which is preloaded with the programmable divisor. Its preset input is connected to the strobe pin. The second stage is a 5:1 multiplexer which determines the actual divisor. The multiplexer is controlled by the select inputs S3 and S4, which are connected to the enable outputs E1 and E2 of the two register stages.

The presettable up/down counter of the SN74LS697DW can generate both divide-by-N and divide-by-N-1 outputs. When the S3 and S4 select inputs are set to "Hi" and "Lo" respectively, the 5:1 multiplexer selects the Q0 output of the first register stage as the counter\'s preset input. This produces a divide-by-N cascade, where the first output, QĊ1, will be of the same duty-cycle as its input. The second output, QĊ2, will be one-half of the duty-cycle of the first output, and so on. The last output, QĊn, is one-half of the duty-cycle of the previous output, and so on.

The SN74LS697DW is a versatile monolithic IC that can be used for a wide range of applications, including delay-locked loops, digital frequency dividers, digital frequency machines, and digital frequency synthesizers. It can also be used for data processing, data formatting, and digital communication systems. The chip is fabricated in a precision-bonded, monolithic device and is designed for easy integration into many types of logic circuits. It has an asynchronous reset input, which allows fast resetting of the internal logic, and multiple output options that allow both divide-by-N and divide-by-N-1 functions. The SN74LS697DW is ideal for applications requiring high speed, low power consumption. This makes it well-suited for use in communication systems, data processing, and data formatting applications.

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