MC14553BCPG

3位数字BCD码计数器

3-Digit BCD Counter

The MC14553B 3−digit BCD counter consists of 3 negative edge triggered BCD counters that are cascaded synchronously. A quad latch at the output of each counter permits storage of any given count. The information is then time division multiplexed, providing one BCD number or digit at a time. Digit select outputs provide display control. All outputs are TTL compatible. An on−chip oscillator provides the low−frequency scanning clock which drives the multiplexer output selector.

This device is used in instrumentation counters, clock displays, digital panel meters, and as a building block for general logic applications.

Features

•TTL Compatible Outputs

•On−Chip Oscillator

•Cascadable

•Clock Disable Input

•Pulse Shaping Permits Very Slow Rise Times on Input Clock

•Output Latches

•Master Reset

•Pb−Free Packages are Available

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