1. General description

The 74HC393; 74HCT393 is a dual 4-stage binary ripple counter. Each counter features a clock

input (nCP), an overriding asynchronous master reset input (nMR) and 4 buffered parallel outputs

(nQ0 to nQ3). The counter advances on the HIGH-to-LOW transition of nCP. A HIGH on nMR

clears the counter stages and forces the outputs LOW, independent of the state of nCP. Inputs

include clamp diodes. This enables the use of current limiting resistors to interface inputs to

voltages in excess of VCC.

2. Features and benefits

? Wide supply voltage range from 2.0 V to 6.0 V

? CMOS low power dissipation

? High noise immunity

? Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

? Complies with JEDEC standards:

? JESD8C (2.7 V to 3.6 V)

? JESD7A (2.0 V to 6.0 V)

? Input levels:

? For 74HC393: CMOS level

? For 74HCT393: TTL level

? ESD protection:

? HBM JESD22-A114F exceeds 2000 V

? MM JESD22-A115-A exceeds 200 V.

? Two 4-bit binary counters with individual clocks

? Divide by any binary module up to 28 in one package

? Two master resets to clear each 4-bit counter individually

74HC393PW屬于集成電路（IC） > 計(jì)數(shù)器，除法器。安世半導(dǎo)體(中國)有限公司制造生產(chǎn)的74HC393PW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(gè)并行輸出重新發(fā)送累加的計(jì)數(shù)，和/或生成單個(gè)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。