NR8576 Datasheet, PDF (5/11 Pages) Nippon Precision Circuits Inc – Real-time Clock Modules

NR8576 series
AC Characteristics
Ta = −40 to 85°C, CL = 50pF unless otherwise noted.
Parameter
CLK clock period
CLK LOW-level pulsewidth
CLK HIGH-level pulsewidth
CE setup time
CE hold time
CE enable time
Write data setup time
Write data hold time
WR setup time
WR hold time
DATA output delay time
DATA output floating time
Clock rise time
Clock fall time
FOUT rise time (CL = 30pF)
FOUT fall time (CL = 30pF)
Disable time (CL = 30pF)
Enable time (CL = 30pF)
FOUT duty cycle (CL = 30pF)
Wait time
Symbol
t _CLK
t _CLKL
t _CLKH
t _CES
t _CEH
t _CE
t _SD
t _HD
t _WRS
t _WRH
t _DATD
t _DZ
t _r1
t _f1
t _r2
t _f2
t_HZ
t_LZ
t_ZH
t_ZL
Duty
t _RCV
Rating
V_DD = 5V ± 10%
V_DD = 3V ± 10%
Unit
min
max
min
max
0.75
7800
1.5
7800
µs
0.375
3900
0.75
3900
µs
0.375
3900
0.75
3900
µs
0.375
3900
0.75
3900
µs
0.375
–
0.75
–
µs
–
0.9
–
0.9
sec
0.1
–
0.2
–
µs
0.1
–
0.1
–
µs
100
–
100
–
ns
100
–
100
–
ns
–
0.2
–
0.4
µs
–
0.1
–
0.2
µs
–
50
–
100
ns
–
50
–
100
ns
–
100
–
200
ns
–
100
–
200
ns
–
100
–
200
ns
–
100
–
200
ns
–
100
–
200
ns
–
100
–
200
ns
40
60
40
60
%
0.95
–
1.9
–
µs
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