CD4518BPWE4

Timing:	Synchronous
Base Part Number:	4518
Supplier Device Package:	16-TSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Voltage - Supply:	3V ~ 18V
Trigger Type:	Positive, Negative
Count Rate:	8MHz
Series:	4000B
Reset:	Asynchronous
Number of Bits per Element:	4
Number of Elements:	2
Direction:	Up
Logic Type:	BCD Counter
Part Status:	Active
Packaging:	Tube

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CD4518BPWE4 is a logic device designed to provide high-speed counting and dividing functions - an essential operation in many process control and data acquisition applications. The device is part of the family of CMOS logic products from National Semiconductor.The CD4518BPWE4 is a dual BCD counter, primarily used for counts up or down in response to a change in logic level on the clock input, but can also be used for other applications. The device features two independent four-stage synchronous, binary, decade counters with separate Clock (CLR), enable (CE) inputs, asynchronous reset, and parallel outputs. It has both high and low count inputs and an internal positive level detector.By physically tying the clock and count inputs together and providing a logic high signal to the enable input, the CD4518BPWE4 can be used as a divide-by-10 device.When used as a counter, it will count up or down in response to a change in the logic level on the clock input. To ensure the output data is valid, the enable input requires a logic low level to enable the count inputs. Once enabled, the device will continue to count up or down until the maximum count is reached or the reset signal is applied. At this point, the count will begin again at zero, or restart as defined by the state of the reset input.The device also has an internal positive level detector to detect high logic level signals and assert the logic 0 signal on the parallel outputs. Additionally, it features power-saving capability when paused or when the clock input is inactive.The application field of the CD4518BPWE4 includes data acquisition, signal processing, digital signal processing, and system control. The device can be used to control digital to analog convertor sampling rate, optical disk data retrieval, LCD driver digital to analog conversion, and digital motor speed control.The CD4518BPWE4 operates over a wide range of supply voltages, from 3V up to 18V. It is designed with the standard logic input and output levels for CMOS logic circuits. The active low inputs of the device are compatible with TTL logic circuits and the logic output levels are compatible with standard CMOS/LS TTL logic.In conclusion, the CD4518BPWE4 is a well-designed, cost-effective solution for any application needing high-speed counters or dividers. It offers the dual purpose of both counting and dividing in an efficient and reliable manner.

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