參數(shù)資料
型號(hào): X1240S8
英文描述: Real Time Clock/Calendar with EEPROM
中文描述: 實(shí)時(shí)時(shí)鐘/日歷帶有EEPROM
文件頁(yè)數(shù): 15/19頁(yè)
文件大?。?/td> 74K
代理商: X1240S8
X1240
15
AC SPECIFICATIONS
(T
A
= -40C to +85C, V
CC
= +2.7V to +3.6V, unless otherwise specified.)
Notes:
(1) Typical values are for T
A
= 25C and V
CC
= 5.0V
(2) This parameter is periodically sampled and not 100% tested.
(3) Cb = total capacitance of one bus line in pF.
TIMING DIAGRAMS
Bus Timing
Symbol
Parameter
Min
Max
Units
f
SCL
t
IN
t
AA
t
BUF
SCL Clock Frequency
Pulse width Suppression Time at inputs
SCL LOW to SDA Data Out Valid
Time the bus must be free before a new transmission
can start
Clock LOW Time
Clock HIGH Time
Start Condition Setup Time
Start Condition Hold Time
Data In Setup Time
Data In Hold Time
Stop Condition Setup Time
Data Output Hold Time
SDA and SCL Rise Time
SDA and SCL Fall Time
Capacitive load for each bus line
0
50
0.1
1.3
400
KHz
nS
μ
S
μ
S
0.9
t
LOW
t
HIGH
t
SU:STA
t
HD:STA
t
SU:DAT
t
HD:DAT
t
SU:STO
t
DH
t
R
t
F
Cb
1.3
0.6
0.6
0.6
100
0
0.6
50
μ
S
μ
S
μ
S
μ
S
nS
μ
S
μ
S
nS
nS
nS
pF
20 +.1Cb
(3)
20 +.1Cb
(3)
300
300
400
t
SU:STO
t
DH
t
HIGH
t
SU:STA
t
HD:STA
t
HD:DAT
t
SU:DAT
SCL
SDA IN
SDA OUT
t
F
t
LOW
t
BUF
t
AA
t
R
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