NR8576AB - Nippon Precision Circuits Inc

NR8576AB Real-time Clock Modules

Name VSS CE I/O – I Ground Chip enable. HIGH: Enable LOW: DATA goes high impedance; input on WR, CLK, and DATA stops; and the TM bit is cleared. FOUT output frequency select. HIGH: 1 Hz LOW: 32.768 kHz DATA input/output control switch. HIGH: Data input mode (RTC write) LOW: Data output mode (RTC read) FOUT output enable control. HIGH: The frequency selected .

Features

s s s s s s s s Crystal oscillator element built-in for adjustmentfree use Timer counters for second, minute, hour, day, day of the week, month, and year 2.5 to 5.5 V operating voltage range 1.7 ± 0.3 V supply voltage detection threshold 1.0 µA at 3.0 V (typ) current consumption Automatic leap-year calendar adjustment 32.768 kHz and 1 Hz output selectable Package
• 14-pin SOP (NR8576A×)
• 18-pin SOP (NR8576B×) 18-pin SOP N.C N.C N.C N.C FOE WR FSEL CE VSS 1 18 N.C N.C N.C N.C VDD N.C CLK DATA FOUT NR8576B 2 3 4 5 6 7 8 9 17 16 15 14 13 12 11 10 SERIES CONFIGURATION Device NR8576AA .