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NR8576AA Datasheet(PDF) 1 Page - Nippon Precision Circuits Inc

Part No. NR8576AA
Description  Real-time Clock Modules
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Maker  NPC [Nippon Precision Circuits Inc]
Homepage  http://www.npc.co.jp/en
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NR8576AA Datasheet(HTML) 1 Page - Nippon Precision Circuits Inc

 
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NR8576 Series
NIPPON PRECISION CIRCUITS—1
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
×) and miniature
18-pin SOPs (NR8576B
×).
FEATURES
s
Crystal oscillator element built-in for adjustment-
free use
s
Timer counters for second, minute, hour, day, day
of the week, month, and year
s
2.5 to 5.5 V operating voltage range
s
1.7 ± 0.3 V supply voltage detection threshold
s
1.0 µA at 3.0 V (typ) current consumption
s
Automatic leap-year calendar adjustment
s
32.768 kHz and 1 Hz output selectable
s
Package
• 14-pin SOP (NR8576A
×)
• 18-pin SOP (NR8576B
×)
SERIES CONFIGURATION
PINOUTS
14-pin SOP
18-pin SOP
Device
Package
Frequency deviation
NR8576AA
14-pin SOP
5 ± 12 ppm
NR8576AB
14-pin SOP
5 ± 23 ppm
NR8576BA
18-pin SOP
5 ± 12 ppm
NR8576BB
18-pin SOP
5 ± 23 ppm
1
CE
2
N.C
3
VSS
4
N.C
5
N.C
6
FOUT
7
10
9
8
14
13
12
11
FSEL
WR
FOE
N.C
N.C
VDD
CLK
DATA
1
CE
2
N.C
3
VSS
4
N.C
5
N.C
6
FOUT
7
16
17
18
12
13
14
15
FSEL
WR
FOE
N.C
N.C
VDD
CLK
DATA
811
N.C
N.C
N.C
N.C
10
9


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