General description

The 74F269 is a fully synchronous 8-stage up/down counter featuring a preset capability for programmable operation, carry look-ahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the rising edge of the clock.

Features and benefits

■ Synchronous counting and loading

■ Built-in look-ahead carry capability

■ Count frequency 115 MHz (typical)

■ Supply current 95 mA (typical)

N74F269D屬于集成電路（IC） > 計(jì)數(shù)器，除法器。恩智浦半導(dǎo)體公司制造生產(chǎn)的N74F269D計(jì)數(shù)器，除法器計(jì)數(shù)器和除法器 IC 是數(shù)字邏輯器件，可對輸入發(fā)生的邏輯轉(zhuǎn)換進(jìn)行計(jì)數(shù)，然后使用多個并行輸出重新發(fā)送累加的計(jì)數(shù)，和/或生成單個輸出信號轉(zhuǎn)換，從而對應(yīng)用某些整數(shù)數(shù)量輸入信號轉(zhuǎn)換進(jìn)行響應(yīng)。除了簡單的事件計(jì)數(shù)，它們還可用于各種頻率合成應(yīng)用。