NR8576 Просмотр технического описания (PDF) - Nippon Precision Circuits
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NR8576 Datasheet PDF : 10 Pages
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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
V IN
VOUT
T stg
T sld
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
V CLK
Topr
Condition
Rating
Unit
−0.3 to 7.0
V
VSS − 0.3 to VDD + 0.3
V
VSS − 0.3 to VDD + 0.3
V
−55 to 125
°C
260
°C
10
s
Rating
Unit
2.5 to 5.5
V
1.4 to 5.5
V
−40 to 85
°C
NIPPON PRECISION CIRCUITS—3
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