NR8576AB Datasheet PDF - Nippon Precision Circuits Inc
| Part Number | NR8576AB | |
| Description | Real-time Clock Modules | |
| Manufacturers | Nippon Precision Circuits Inc | |
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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
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NR8576 Series
AC Characteristics
VDD = 3.0 V, VSS = 0 V, Ta = 25 °C 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 = 30 pF)
FOUT fall time (CL = 30 pF)
Disable time (CL = 30 pF)
Enable time (CL = 30 pF)
FOUT duty cycle (CL = 30 pF)
Wait time
Symbol
tCLK
tCLKL
tCLKH
tCES
tCEH
tCE
tSD
tHD
tWRS
tWRH
tDATD
tDZ
tr1
tf1
tr2
tf2
tHZ
tLZ
tZH
tZL
Duty
tRCV
Rating
VDD = 5 V ± 10%
min max
VDD = 3 V ± 10%
min max
0.75 7800 1.5 7800
0.375
3900
0.75
3900
0.375
3900
0.75
3900
0.375
3900
0.75
3900
0.375
–
0.75
–
– 0.9 – 0.9
0.1 – 0.2 –
0.1 – 0.1 –
100 – 100 –
100 – 100 –
– 0.2 – 0.4
– 0.1 – 0.2
– 50 – 100
– 50 – 100
– 100 – 200
– 100 – 200
– 100 – 200
– 100 – 200
– 100 – 200
– 100 – 200
40 60 40 60
0.95 – 1.9 –
Unit
µs
µs
µs
µs
µs
s
µs
µs
ns
ns
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
%
µs
NIPPON PRECISION CIRCUITS—5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for NR8576AB electronic component. |
| Information | Total 10 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ NR8576AB.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| NR8576AA | The function is Real-time Clock Modules. Nippon Precision Circuits Inc | |
| NR8576AB | The function is Real-time Clock Modules. Nippon Precision Circuits Inc | |
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