SN74ALS867ADW

Timing:	Synchronous
Base Part Number:	74ALS867
Supplier Device Package:	24-SOIC
Package / Case:	24-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Voltage - Supply:	4.5V ~ 5.5V
Trigger Type:	Positive Edge
Count Rate:	35MHz
Series:	74ALS
Reset:	Asynchronous
Number of Bits per Element:	8
Number of Elements:	1
Direction:	Up, Down
Logic Type:	Binary Counter
Part Status:	Active
Packaging:	Tube

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SN74ALS867ADW, a dual 8-bit synchronous presettable counter, belongs to the Logic - Counters, Dividers category. It is manufactured by Texas Instruments and has a wide range of applications and uses.The SN74ALS867ADW is designed with dual synchronous 8-bit up/down counter with an asynchronous preset, which provides for rapid and accurate counting. The device can be used in a wide variety of frequently changing, high-speed counting applications ranging from real-time clocks, to temperature sensing and industrial control systems. The device contains two independent preset registers and two independent counter blocks. Each counter has a synchronous clock input (CP), asynchronous parallel load inputs (PL0–7), and parallel outputs (P0–7). The asynchronous parallel load inputs (PL0–7) allow the device to be loaded with a 8-bit number. The synchronous clock inputs (CP) allow the counter to be clocked with rising or falling edge or both. The device has two clock select bits (CS1, CS2) that allow the user to select the desired operation of each counter. The device also has an asynchronous clear/reset (CLR/RST) input, which when pulled to low resets the counters to zero. The working principle of the device is quite simple. When the CP input is triggered, the counter will increment or decrement its count value. The initial count value loaded in the device is the preset value. The device also has a built-in control logic which allows the user to set the desired functionality such as the direction of counting, enabling or disabling the sinput/output pins, enable/disable the counter blocks, enable/disable the reset, and so on. In terms of usage and applications, the SN74ALS867ADW is a powerful and reliable device used in a number of applications such as frequency dividers, alarm systems, display multiplexers, automotive and industrial control applications, vibration sensing and analysis, analog to digital and digital to analog conversion, pulse and timer circuits, computer system design and other digital signal processing applications. Due to its ultra-low power consumption under 1.35 mA, the SN74ALS867ADW also finds applications in battery operated systems or systems with strict power requirements. All in all, the SN74ALS867ADW is a reliable and versatile device suitable for various application areas.

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