由其分销商提供的 onsemi MC74HC390AFL1 的描述。
DUAL 4-STAGE BINARY RIPPLE COUNTER WITH ÷ 2 AND ÷ 5 SECTIONS
Negative Edge 2V~6V 4 2 50MHz SO-16EIAJ Counters / Dividers ROHS
DUAL 4-STAGE BINARY RIPPLE COUNT
MC74HC390AFL1, SHIFT REGISTERS;
IC DECADE COUNT DL 4B 16SOEIAJ