National Semiconductor（TI ）
IC 0 TIMER(S), REAL TIME CLOCK, PQCC28, PLASTIC, LCC-28, Timer or RTC
Texas Instruments(德州仪器)
Real Time Clock (RTC) 28-PLCC -40 to 85
Texas Instruments(德州仪器)
Real Time Clock Y
Texas Instruments(德州仪器)
Real Time Clock (RTC) 28-PLCC -40 to 85
National Semiconductor（TI ）
IC 0 TIMER(S), REAL TIME CLOCK, PQCC28, PLASTIC, LCC-28, Timer or RTC
