SN74ALS193AD

The SN74ALS193AD is a presettable 4-bit binary synchronous up/down counter. It is designed for clocked logic operations, allowing for both decreasing and increased counts. The device is a decade counter configured to store and continuously shift a 4-bit binary value in response to extremely high speed clock pulses. It is available in a variety of package types, including DIP and micro DIP.

Features

• Presettable to any desired State
• High noise immunity
• Low power dissipation
• Low operating frequency
• Wide voltage operation

Applications

The SN74ALS193AD can be used to construct 32-bit synchronous up/down counter, which is suitable for counting up to the maximum count before rolling over and then counting back down to zero. The SN74ALS193AD can also be used to create various types of logic functions, such as shift registers, dividers, and digital timers. It can be used for generating digital address signals for computers and video monitor systems, for establishing instrument range applications, and for controlling peripheral devices such as printer and displays.

Working Principle

The SN74ALS193AD is a synchronous 4-bit binary up/down counter that can be triggered into continuous and clocked modes. The device has an internal synchronous data register, an enable terminal that is used to control output enable signals, an up-down counter enable terminal, a direction control input, and four synchronous up/down clock inputs. The internal data register holds the cascaded values of the four digit binary inputs. When the Up/Down Counter Enable and Direction Control terminals are active, the device will increment or decrement the count on each clock edge accordingly.

In order to reset the count to the desired state, the device has an asynchronous clear input. When this input is set to the logic state, the device will reset the count to the reset value. The output enable pin can be used to activate the counter’s output by enabling all four output ports.

Conclusion

The SN74ALS193AD is a presettable 4-bit binary synchronous up/down counter, designed for clocked logic operations. It is suitable for applications such as digital address signals for computers, instrument range applications and other peripheral device control. The device allows for extremely high speed clock pulses, providing multiple logic functions such as shift registers, dividers, and digital timers. It also has an asynchronous clear input for resetting the count to the desired state, as well as an output enable pin for activating the counter’s output.