INTERSIL
定时器, 8MHZ, 4.5 V至5.5 V, LCC-28
芯片, 计时器, 3, 单稳态
芯片, 可编程间歇式定时器, 8-12MHZ, PLCC-28
ZILOG
芯片, CTC (Z80) 6MHZ
MAXIM INTEGRATED PRODUCTS
芯片, 定时器