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The NR8576 Series devices are serial-interface type real-time clock module ICs with built-in crystal oscillator elements. They feature timer counter circuits that keep track of time from the current second to the current year, automatic leap-year adjustment, and a supply voltage detect function. Also, a 32.768 kHz/1 Hz select output function is incorporated for independent hardware control. They are available in compact 14-pin SOPs (NR8576A ×) and miniature 18-pin SOPs (NR8576B ×).
NR8576 Maximum Ratings
Parameter
Symbol
Condition
Rating
Unit
Supply voltage range
VDD
Ta = 25
-0.3 to 7.0
V
Input voltage range
VIN
Ta = 25
VSS - 0.3 to VDD + 0.3
V
Output voltage range
VOUT
Ta = 25
VSS - 0.3 to VDD + 0.3
V
Storage temperature range
Tstg
-55 to 125
°C
Soldering temperature
Tsld
260
°C
Soldering time
tsld
0
S
NR8576 Features
`Crystal oscillator element built-in for adjustmentfreeuse `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 A 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*)