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NR8576AA Datasheet(PDF) 3 Page - Nippon Precision Circuits Inc

Part No. NR8576AA
Description  Real-time Clock Modules
Download  10 Pages
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Maker  NPC [Nippon Precision Circuits Inc]
Homepage  http://www.npc.co.jp/en
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NR8576AA Datasheet(HTML) 3 Page - Nippon Precision Circuits Inc

 
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NR8576 Series
NIPPON PRECISION CIRCUITS—3
PIN DESCRIPTION
SPECIFICATIONS
Absolute Maximum Ratings
VSS = 0 V
Recommended Operating Conditions
VSS = 0 V
Name
I/O
Description
VSS
Ground
CE
I
Chip enable.
HIGH: Enable
LOW: DATA goes high impedance; input on WR, CLK, and DATA stops; and the TM bit is cleared.
FSEL
I
FOUT output frequency select.
HIGH: 1 Hz
LOW: 32.768 kHz
WR
I
DATA input/output control switch.
HIGH: Data input mode (RTC write)
LOW: Data output mode (RTC read)
FOE
I
FOUT output enable control.
HIGH: The frequency selected by FSEL is output on FOUT.
LOW: FOUT goes high impedance.
VDD
Supply voltage.
Connect a
≥ 0.1 µF capacitor between VDD and VSS.
CLK
I
System clock input.
Data is input (RTC write mode) and output (RTC read mode) on the rising edge of CLK.
DATA
I/O
Data read and write input/output
FOUT
O
Frequency output (output controlled by FOE and frequency selected by FSEL).
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.
N. C
No connection. Leave open for normal use.
Parameter
Symbol
Condition
Rating
Unit
Supply voltage range
VDD
Ta = 25 °C
−0.3 to 7.0
V
Input voltage range
VIN
Ta = 25 °CVSS − 0.3 to VDD + 0.3
V
Output voltage range
VOUT
Ta = 25 °CVSS − 0.3 to VDD + 0.3
V
Storage temperature range
Tstg
−55 to 125
°C
Soldering temperature
Tsld
260
°C
Soldering time
tsld
10
s
Parameter
Symbol
Condition
Rating
Unit
Supply voltage range
VDD
2.5 to 5.5
V
Clock supply voltage range
VCLK
1.4 to 5.5
V
Operating temperature range
Topr
−40 to 85
°C


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