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參數資料
| 型號： | NR8576BB |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | Real-time Clock Modules |
| 中文描述： | 實時時鐘模塊 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 86K |
| 代理商： | NR8576BB |
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
18-pin SOPs (NR8576B
×
).
×
) and miniature
FEATURES
I
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 ± 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
I
I
I
I
I
I
I
×
×
)
)
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
N
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
8
11
N.C
N.C
N.C
N.C
10
9
N
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