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參數資料
| 型號： | R2051K |
| 英文描述： | real-time clock ICs |
| 中文描述： | 實時時鐘IC |
| 文件頁數： | 7/53頁 |
| 文件大小： | 343K |
| 代理商： | R2051K |
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R2051 Series
12345
Rev.1.04 - 7 -
I
AC ELECTRICAL CHARACTERISTICS
Unless otherwise specified: VSS=0V,Topt=-40 to +85
°
C
Input and Output Conditions: VIH=0.8
×
VCC,VIL=0.2
×
VCC,VOH=0.8
×
VCC,VOL=0.2
×
VCC,CL=50pF
Sym
-bol
f
SCL
SCL Clock Frequency
t
LOW
SCL Clock Low Time
t
HIGH
SCL Clock High Time
t
HD;STA
Start
Condition
Hold
Time
t
SU;STO
Stop Condition Set Up
Time
t
SU;STA
Start Condition Set Up
Time
t
SU;DAT
Data Set Up Time
t
HD;DAT
Data Hold Time
t
PL;DAT
SDA “L” Stable Time
After Falling of SCL
t
PZ;DAT
SDA off Stable Time
After Falling of SCL
t
R
Rising Time of SCL and
SDA (input)
t
F
Falling Time of SCL and
SDA (input)
t
SP
Spike Width that can
be removed with Input
Filter
t
RCV
Recovery
Time
from
Stop Condition to Start
Condition
t
DELAY
Output Delay Time of
Voltage Detector
*1) VCC voltage interfacing with CPU is defined by Vaccess (P.4
I
RECOMMENDED OPERATING CONDITIONS)
*) For reading/writing timing, see “P.29
I
Interfacing with the CPU
G
Data Transmission under Special Condition”.
S
VCC
≥
1.7V *1)
Typ.
VCC
≥
2.5V *1)
Typ.
Item
Condi-
Tions
Min.
4.7
4.0
4.0
Max.
100
Min.
1.3
0.6
0.6
Max.
400
Unit
kHz
μ
s
μ
s
μ
s
4.0
0.6
μ
s
4.7
0.6
μ
s
250
0
2.0
200
0
0.9
ns
ns
μ
s
2.0
0.9
μ
s
1000
300
ns
300
300
ns
50
50
ns
62
62
μ
s
Time
Keeping
100
105
110
100
105
110
ms
SDA(OUT)
SCL
Sr
P
t
PZ;DAT
t
HIGH
t
SU;DAT
t
HD;STA
t
SP
t
SU;STO
t
LOW
t
SU;STA
SDA(IN)
t
HD;STA
t
PL;DAT
Sr
P
Stop Condition
S
Start Condition
Repeated Start Condition
t
HD;DAT
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相關代理商/技術參數 |
參數描述 |
|---|---|
| R2051K01-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051K02-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S01-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S02-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S03-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
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