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NR8576BBのメーカーはNippon Precision Circuits Incです、この部品の機能は「Real-time Clock Modules」です。 |
部品番号 | NR8576BB |
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部品説明 | Real-time Clock Modules | ||
メーカ | Nippon Precision Circuits Inc | ||
ロゴ | |||
このページの下部にプレビューとNR8576BBダウンロード(pdfファイル)リンクがあります。 Total 10 pages
NIPPON PRECISION CIRCUITS INC.
NR8576 Series
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
VSS 1
N.C 2
CE 3
FSEL 4
WR 5
FOE 6
N.C 7
18-pin SOP
N.C 1
N.C 2
N.C 3
N.C 4
FOE 5
WR 6
FSEL 7
CE 8
VSS 9
Device
NR8576AA
NR8576AB
NR8576BA
NR8576BB
Package
14-pin SOP
14-pin SOP
18-pin SOP
18-pin SOP
Frequency deviation
5 ± 12 ppm
5 ± 23 ppm
5 ± 12 ppm
5 ± 23 ppm
14 FOUT
13 N.C
12 N.C
11 DATA
10 CLK
9 VDD
8 N.C
18 N.C
17 N.C
16 N.C
15 N.C
14 VDD
13 N.C
12 CLK
11 DATA
10 FOUT
NIPPON PRECISION CIRCUITS—1
1 Page NR8576 Series
PIN DESCRIPTION
Name
VSS
CE
FSEL
WR
FOE
VDD
CLK
DATA
FOUT
N. C
I/O Description
– Ground
Chip enable.
I HIGH: Enable
LOW: DATA goes high impedance; input on WR, CLK, and DATA stops; and the TM bit is cleared.
FOUT output frequency select.
I HIGH: 1 Hz
LOW: 32.768 kHz
DATA input/output control switch.
I HIGH: Data input mode (RTC write)
LOW: Data output mode (RTC read)
FOUT output enable control.
I HIGH: The frequency selected by FSEL is output on FOUT.
LOW: FOUT goes high impedance.
–
Supply voltage.
Connect a ≥ 0.1 µF capacitor between VDD and VSS.
I
System clock input.
Data is input (RTC write mode) and output (RTC read mode) on the rising edge of CLK.
I/O Data read and write input/output
Frequency output (output controlled by FOE and frequency selected by FSEL).
O In 1 Hz output mode, the 1 Hz signal is synchronized to the internal 1 second signal.
FOUT output is not affected by the CE signal.
– No connection. Leave open for normal use.
SPECIFICATIONS
Absolute Maximum Ratings
VSS = 0 V
Parameter
Supply voltage range
Input voltage range
Output voltage range
Storage temperature range
Soldering temperature
Soldering time
Symbol
VDD
VIN
VOUT
Tstg
Tsld
tsld
Condition
Ta = 25 °C
Ta = 25 °C
Ta = 25 °C
Recommended Operating Conditions
VSS = 0 V
Parameter
Supply voltage range
Clock supply voltage range
Operating temperature range
Symbol
VDD
VCLK
Topr
Condition
Rating
−0.3 to 7.0
VSS − 0.3 to VDD + 0.3
VSS − 0.3 to VDD + 0.3
−55 to 125
260
10
Unit
V
V
V
°C
°C
s
Rating
2.5 to 5.5
1.4 to 5.5
−40 to 85
Unit
V
V
°C
NIPPON PRECISION CIRCUITS—3
3Pages Timing Diagrams
Data read
WR
CE
CLK
DATA
Data write
tWRS
t tCES CLK
t tCLKH CLKL
tDATD
WR
CE
CLK
DATA
tWRS
t tCES CLK
t tCLKH CLKL
t tSD HD
NR8576 Series
tCE
t tf1 r1
tCE
t tf1 r1
tWRH
t tCEH
RCV
tDZ
tWRH
t tCEH
RCV
NIPPON PRECISION CIRCUITS—6
6 Page | |||
ページ | 合計 : 10 ページ | ||
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PDF ダウンロード | [ NR8576BB データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
NR8576BA | Real-time Clock Modules | Nippon Precision Circuits Inc |
NR8576BB | Real-time Clock Modules | Nippon Precision Circuits Inc |