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M41T60 数据表(PDF) 21 Page - STMicroelectronics

部件名 M41T60
功能描述  Serial access real-time clock
PDF  27 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M41T60 数据表(HTML) 21 Page - STMicroelectronics

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M41T60
DC and AC parameters
Doc ID 10396 Rev 13
21/27
Figure 15.
Bus timing requirements sequence
Note:
P = STOP and S = START
Table 10.
Oscillator characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VSTA
Oscillator start voltage
≤ 10 seconds
1.5
V
tSTA
Oscillator start time
VCC = 3.0 V
1
s
Cg
XIN capacitance
12
pF
Cd
XOUT capacitance
12
pF
IC-to-IC frequency variation (1)
1.
Reference value. TA = 25 °C, VCC = 3.0 V, CMJ-145 (CL = 6 pF, 32,768 Hz) manufactured by Citizen,
CL = Cg • Cd / (Cg + Cd)
–10
+10
ppm
AI00589
SDA
P
tSU:STO
tSU:STA
tHD:STA
SR
SCL
tSU:DAT
tF
tHD:DAT
tR
tHIGH
tLOW
tHD:STA
tBUF
S
P
Table 11.
AC characteristics
Symbol
Parameter(1)
1.
Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 1.3 to 4.4 V (except where noted).
Min
Max
Unit
fSCL
SCL clock frequency
0
400
kHz
tLOW
Clock low period
1.3
µs
tHIGH
Clock high period
600
ns
tR
SDA and SCL rise time
300
ns
tF
SDA and SCL fall time
300
ns
tHD:STA
START condition hold time
(after this period the first clock pulse is generated)
600
ns
tSU:STA
START condition setup time
(only relevant for a repeated start condition)
600
ns
tSU:DAT
Data setup time
100
ns
tHD:DAT
(2)
2.
Transmitter must internally provide a hold time to bridge the undefined region (300 ns max.) of the falling
edge of SCL.
Data hold time
0
µs
tSU:STO
STOP condition setup time
600
ns
tBUF
Time the bus must be free before a new transmission can
start
1.3
µs



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