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NR8576BA Datasheet

  • NR8576BA

  • Real-time Clock Modules

  • 10頁

  • NPC

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NR8576 Series
NIPPON PRECISION CIRCUITS INC.
Real-time Clock Modules
OVERVIEW
The NR8576 Series devices are serial-interface type
real-time clock module ICs with built-in crystal
oscillator elements. They feature timer counter cir-
cuits 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脳) and miniature
18-pin SOPs (NR8576B脳).
PINOUTS
14-pin SOP
VSS
N.C
CE
FSEL
WR
FOE
N.C
1
2
3
4
5
6
7
14
13
12
11
10
9
8
FOUT
N.C
N.C
DATA
CLK
VDD
N.C
NR8576A
FEATURES
s
s
s
s
s
s
s
s
Crystal oscillator element built-in for adjustment-
free 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 鹵 0.3 V supply voltage detection threshold
1.0 碌A(chǔ) at 3.0 V (typ) current consumption
Automatic leap-year calendar adjustment
32.768 kHz and 1 Hz output selectable
Package
鈥?14-pin SOP (NR8576A
脳
)
鈥?18-pin SOP (NR8576B
脳
)
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
NR8576AB
NR8576BA
NR8576BB
Package
14-pin SOP
14-pin SOP
18-pin SOP
18-pin SOP
Frequency deviation
5 鹵 12 ppm
5 鹵 23 ppm
5 鹵 12 ppm
5 鹵 23 ppm
NIPPON PRECISION CIRCUITS鈥?

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