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M41ST87Y Arkusz danych(PDF) 11 Page - STMicroelectronics

Numer części M41ST87Y
Szczegółowy opis  5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST87Y Arkusz danych(HTML) 11 Page - STMicroelectronics

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M41ST87Y, M41ST87W
Figure 8. Bus Timing Requirements Sequence
Table 2. AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V or 2.7 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(1)
Min
Max
Unit
fSCL
SCL Clock Frequency
0
400
kHz
tBUF
Time the bus must be free before a new transmission can start
1.3
µs
tEXPD
EX to ECON Propagation Delay
M41ST87Y
10
ns
M41ST87W
15
ns
tF
SDA and SCL Fall Time
300
ns
tHD:DAT
(2)
Data Hold Time
0
µs
tHD:STA
START Condition Hold Time
(after this period the first clock pulse is generated)
600
ns
tHIGH
Clock High Period
600
ns
tLOW
Clock Low Period
1.3
µs
tR
SDA and SCL Rise Time
300
ns
tSU:DAT
Data Setup Time
100
ns
tSU:STA
START Condition Setup Time
(only relevant for a repeated start condition)
600
ns
tSU:STO
STOP Condition Setup Time
600
ns
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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