M41ST87WSS6F STMicroelectronics, M41ST87WSS6F Datasheet - Page 14

• Manufacturer Part Number: M41ST87WSS6F
• Description: IC SUPERVISOR RTC/NVRAM 20-SSOP
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Supervisorr

Specifications of M41ST87WSS6F

• Memory Size: 160B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP
• Function: Clock, Timestamp, Timekeeper, Watchdog, Alarm, Calendar, Timer, Timer Interrupt
• Rtc Memory Size: 1280 bit
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Supply Current: 500 nA
• Clock Format: Ss
• Clock Ic Type: RTC
• Interface Type: I2C
• Memory Configuration: 128 X 8
• Supply Voltage Range: 2.7V To 3.6V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10616-2

Operating modes
Figure 6.
Figure 7.
Figure 8.
14/54
SCL FROM
MASTER
DATA OUTPUT
BY TRANSMITTER
DATA OUTPUT
BY RECEIVER
CLOCK
DATA
SDA
SCL
case the transmitter must leave the data line high to enable the master to generate the
STOP condition.
Serial bus data transfer sequence
Acknowledgement sequence
Bus timing requirements sequence
t BUF
CONDITION
P
START
START
S
MSB
1
t HD:STA
t R
DATA VALID
DATA LINE
STABLE
t LOW
Doc ID 9497 Rev 9
t HIGH
t F
DATA ALLOWED
CHANGE OF
2
t HD:DAT
t SU:DAT
LSB
8
SR
t SU:STA
ACKNOWLEDGEMENT
CLOCK PULSE FOR
M41ST87Y, M41ST87W
t HD:STA
CONDITION
STOP
9
AI00587
AI00601
P
AI00589
t SU:STO