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參數資料
| 型號： | NR8576AB |
| 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： | 3/10頁 |
| 文件大小： | 86K |
| 代理商： | NR8576AB |
NR8576 Series
NIPPON PRECISION CIRCUITS—3
PIN DESCRIPTION
SPECIFICATIONS
Absolute Maximum Ratings
V
SS
= 0 V
Recommended Operating Conditions
V
SS
= 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 TMbit 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
Systemclock 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
V
DD
T
a
= 25
°
C
0.3 to 7.0
V
Input voltage range
V
IN
T
a
= 25
°
C
V
SS
0.3 to V
DD
+ 0.3
V
Output voltage range
V
OUT
T
a
= 25
°
C
V
SS
0.3 to V
DD
+ 0.3
V
Storage temperature range
T
stg
55 to 125
°
C
Soldering temperature
T
sld
260
°
C
Soldering time
t
sld
10
s
Parameter
Symbol
Condition
Rating
Unit
Supply voltage range
V
DD
2.5 to 5.5
V
Clock supply voltage range
V
CLK
1.4 to 5.5
V
Operating temperature range
T
opr
40 to 85
°
C
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