SN74ALS161BDR

Timing:	Synchronous
Base Part Number:	74ALS161
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Voltage - Supply:	4.5V ~ 5.5V
Trigger Type:	Positive Edge
Count Rate:	40MHz
Series:	74ALS
Reset:	Asynchronous
Number of Bits per Element:	4
Number of Elements:	1
Direction:	Up
Logic Type:	Binary Counter
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The SN74ALS161BDR is a synchronous decade counter and decoder device, which is made by Texas Instruments. This device is widely used in various fields, such as digital clock/calendar circuits, frequency synthesizers, display drivers, counters, decoders and multiplexers. It is widely used in logic, arithmetic and communications applications.The SN74ALS161BDR is made of CMOS technology and is classified under logic, counters, dividers category. This device includes two 4-bit binary counters and a decoder-driver which consists of ten high-impedance outputs. The two binary counters are two 4-bit ripple counters which can be clocked by the positive edge of CP input. There is a load/write R-C input that is used for preloading the counters and for reading data from them. The two 4-bit binary counters are linked together in a cascade, and the outputs from one counter are used as the input to the next counter. The reset input can be used to clear the counter and reset the output pins to 0.The SN74ALS161BDR has a wide range of input voltage, typically from 4 to 6 volts, and an output voltage range of 5 to 15 volts. The device is designed to operate at very high speeds, with a maximum clock frequency of up to 50 MHz, depending on the VDD input voltage. The device also features very low power consumption, with a typical supply current of just 0.6 mA. The SN74ALS161BDR also features power-down management, which means the device can be powered down using the Vss input pin.The SN74ALS161BDR works on the principle of a decade counter. A decade counter is an asynchronous decade counter which consists of four binary counter stages and a decoder-driver. The four binary stages are cascaded together and counted in binary. The output of the first stage is fed as the input to the second stage and so on. When the input pulse is applied to the CP input, the binary value of the counter is incremented by one. Whenever the count wraps around to zero, the decoder-driver will be triggered and a logic high output is generated at the decade output pins. This logic high output will remain until the counter has wrapped around back to a value of zero.The SN74ALS161BDR can be used in a variety of applications, such as digital clock/calendar circuits, frequency synthesizers, display drivers, counters, decoders and multiplexers. In addition to being used in logic, arithmetic and communications applications, this device can also be used in timing and automation systems, digital and analog signal conditioning, and motor control.The SN74ALS161BDR is an efficient, low power synchronous decade counter and decoder device. It is made of CMOS technology and is capable of operating at very high speeds, with a maximum clock frequency of up to 50 MHz. The device is designed to consume very low power, with a typical supply current of just 0.6 mA. It is ideal for applications requiring low power and high performance such as digital clocks/calendars, frequency synthesizers, display drivers, counters, decoders and multiplexers.

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