HT1380A

HT1380A/HT1381A Serial Timekeeper Chip Features • Operating voltage: 2.0V~5.5V • Maximum input serial clock: 500kHz at VDD=2V, 2MHz at VDD=5V • Operating current: –– less than 0.5μA at 2V –– less than 0.7μA at 3V –– less than 1.0μA at 5V • TTL compatible –– VIH: 2.0V~VDD+0.3V at VDD=5V –– VIL: 0.3V~+0.8V at VDD=5V • Two data transmission modes: single-...