RTC-4543SB - Epson

RTC-4543SB SERIAL-INTERFACE REAL TIME CLOCK MODULE

Real time clock module SERIAL-INTERFACE REAL TIME CLOCK MODULE RTC-4543SA/SB • Builtin crystal unit allows adjustment-free efficient operation. • Automatic leap year correction. • Output selectable between 32.768 KHz/1 Hz. • Operating voltage range: 2.5V to 5.5V. • Supply voltage detection voltage: 1.7±0.3V. • Low current consumption: 1.0 µA/2.0V (Max.) Act.

Features

fV Ta=25˚C, VDD=2.0 to 5.5V ±2 Oscillation start time tOSC Ta=25˚C, VDD=2.5V 3 ppm/V s Aging fa First year Ta=25˚C, VDD=5V ±5 ppm/year DC characteristics (VDD=5V±0.5V, Ta=-40 to 85˚C) Item Symbol Condition Min. Typ. Max. Unit “H” input voltage VIH WR, DATA, CE, CLK, 0.8VDD “L” input voltage VIL FOE,FSEL pins — Input off-leak current IOFF WR, CE, CLK, FOE,FSEL pins — 0.2VDD V 0.5 µA “H” output voltage “L” output voltage VOH1 VDD=5.0V IOH=-1.0 mA 4.5 VOH2 VDD=3.0V DATA, FOUT pins 2.5 VOL1 VDD=5.0V IOH=1.0 mA — — — 0.5 V VOL2 VDD=3.0V DATA, FOUT pins 0.8 Outpu.