參數(shù)資料
型號： M41T64
廠商： 意法半導(dǎo)體
英文描述： Serial Access Real-Time Clock with Alarms
中文描述： 串行訪問實時時鐘與鬧鐘
文件頁數(shù)： 27/33頁
文件大小： 670K
代理商： M41T64
27/33
M41T62/63/64/65
Table 16. Oscillator Characteristics
Note: 1. Reference value. T
A
= 25°C, V
CC
= 3.0V, CMJ-145 (C
L
= 6pF, 32,768Hz) manufactured by Citizen.
Figure 27. Bus Timing Requirements Sequence
Table 17. AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
A
= –40 to 85°C; V
CC
= 1.3 to 3.6V (except where noted).
2. Transmitter must internally provide a hold time to bridge the undefined region (300ns max) of the falling edge of SCL.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V
STA
Oscillator Start Voltage
≤
10 seconds
1.5
V
t
STA
Oscillator Start Time
V
CC
= 3.0V
1
s
C
g
XIN
12
pF
C
d
XOUT
12
pF
IC-to-IC Frequency Variation
(1)
–10
+10
ppm
Sym
Parameter
(1)
Min
Typ
Max
Units
f
SCL
SCL Clock Frequency
0
400
kHz
t
LOW
Clock Low Period
1.3
μs
t
HIGH
Clock High Period
600
ns
t
R
SDA and SCL Rise Time
300
ns
t
F
SDA and SCL Fall Time
300
ns
t
HD:STA
START Condition Hold Time
(after this period the first clock pulse is generated)
600
ns
t
SU:STA
START Condition Setup Time
(only relevant for a repeated start condition)
600
ns
t
SU:DAT(2)
Data Setup Time
100
ns
t
HD:DAT
Data Hold Time
0
μs
t
SU:STO
STOP Condition Setup Time
600
ns
t
BUF
Time the bus must be free before a new
transmission can start
1.3
μs
t
rec
Watchdog Output Pulse Width
96
98
ms
AI00589
SDA
P
tSU:STO
tSU:STA
tHD:STA
SR
SCL
tSU:DAT
tF
tHD:DAT
tR
tHIGH
tLOW
tHD:STA
tBUF
S
P
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