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參數(shù)資料
| 型號(hào)： | SM8578 |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | Real-time Clock IC |
| 中文描述： | 實(shí)時(shí)時(shí)鐘IC |
| 文件頁(yè)數(shù)： | 4/16頁(yè) |
| 文件大?。?/td> | 117K |
| 代理商： | SM8578 |
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SM8578BV
NIPPON PRECISION CIRCUITS INC.—4
Oscillator Characteristics
Ta = 25
°
C, C
G
= 10pF, X’tal = NPC reference crystal (C
I
= 30k
, C
L
= 6pF) unless otherwise noted.
AC Characteristics
V
SS
= 0V, Ta =
40 to +85
°
C unless otherwise noted.
Parameter
Symbol
Condition
Rating
Unit
min
typ
max
Oscillator startup time
T
STA
V
DD
= 1.6V
–
–
5.0
s
Oscillator stop voltage
V
STO
–
–
1.5
V
Frequency voltage characteristic
f/V
V
DD
= 1.6 to 5.5V
2
–
2
ppm/V
Frequency accuracy
ε
IC
V
DD
= 5.0V
10
–
10
ppm
Output capacitance
C
D
V
DD
= 5.0V
–
15
–
pF
Parameter
Symbol
Condition
V
DD
= 5.0V ± 10%
V
DD
= 3.0V ± 10%
Unit
min
typ
max
min
typ
max
CLK clock cycle
t
CLK
600
–
–
1200
–
–
ns
CLK HIGH-level pulsewidth
t
WH
300
–
–
600
–
–
ns
CLK LOW-level pulsewidth
t
WL
300
–
–
600
–
–
ns
CE setup time
t
CS
150
–
–
300
–
–
ns
CE hold time
t
CH
200
–
–
400
–
–
ns
CE recovery time
t
CR
300
–
–
600
–
–
ns
CLK hold time
t
CKH
50
–
–
100
–
–
ns
Write data setup time
t
DS
50
–
–
100
–
–
ns
Write data hold time
t
DH
50
–
–
100
–
–
ns
Read data output delay time
t
RD
C
L
= 50pF
–
–
200
–
–
400
ns
Output disable delay time
t
RZ
C
R
L
L
= 50pF
= 10k
–
–
100
–
–
200
ns
Input rise and fall time
t
RF
–
–
20
–
–
40
ns
Abnormal oscillation detection
time
t
OSC
10
–
–
10
–
–
ms
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|---|---|
| SM8578BV | 制造商:NPC 制造商全稱(chēng):Nippon Precision Circuits Inc 功能描述:Real-time Clock IC |
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