MC14553 Datasheet PDF - Motorola

3-Digit BCD Counter

●The MC14553B 3–digit BCD counter consists of 3 negative edgetriggered BCDcounters that are cascadedsynchronously. A quad latch at the output of each counter permits storage of any given count. The information is then time division multiplexed, providingone 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.

●• TTL Compatible Outputs

●• On–Chip Oscillator

●• Cascadable

●• Clock Disable Input

●• Pulse Shaping Permits Very Slow Rise Times on Input Clock

●• Output Latches

●• Master Reset