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M41T62 Datasheet(PDF) 27 Page - STMicroelectronics

No. de pieza M41T62
Descripción Electrónicos  Serial Access Real-Time Clock with Alarms
PDF  33 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T62 Datasheet(HTML) 27 Page - STMicroelectronics

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M41T62/63/64/65
Table 16. Oscillator Characteristics
Note: 1. Reference value. TA = 25°C, VCC = 3.0V, CMJ-145 (CL = 6pF, 32,768Hz) manufactured by Citizen.
Figure 27. Bus Timing Requirements Sequence
Table 17. AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 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
VSTA
Oscillator Start Voltage
≤ 10 seconds
1.5
V
tSTA
Oscillator Start Time
VCC = 3.0V
1s
Cg
XIN
12
pF
Cd
XOUT
12
pF
IC-to-IC Frequency Variation (1)
–10
+10
ppm
Sym
Parameter(1)
Min
Typ
Max
Units
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
(2)
Data Setup Time
100
ns
tHD:DAT
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
trec
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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