OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

M41T00SM6F

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
List of figures M41T00S
4/28 Doc ID 10772 Rev 5
List of figures
Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. 8-pin SOIC connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Serial bus data transfer sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Acknowledgement sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. Slave address location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 8. Alternative READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 9. WRITE mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 10. Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11. Clock calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12. AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 13. Power down/up mode AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 14. Bus timing requirements sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 15. SO8 – 8-lead plastic small package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 16. Carrier tape for SO8 (150 mils body width) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 17. Reel schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
M41T00S Description
Doc ID 10772 Rev 5 5/28
1 Description
The M41T00S is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz
oscillator (external crystal controlled). Eight bytes of the SRAM (see Table 2 on page 13) are
used for the clock/calendar function and are configured in binary coded decimal (BCD)
format. Addresses and data are transferred serially via a two line, bidirectional I
2
C interface.
The built-in address register is incremented automatically after each WRITE or READ data
byte.
The M41T00S has a built-in power sense circuit which detects power failures and
automatically switches to the battery supply when a power failure occurs. The energy
needed to sustain the clock operations can be supplied by a small lithium button supply
when a power failure occurs. The eight clock address locations contain the century, year,
month, date, day, hour, minute, and second in 24-hour BCD format. Corrections for 28, 29
(leap year - valid until year 2100), 30 and 31 day months are made automatically.
The M41T00S is supplied in an 8-pin SOIC.
Figure 1. Logic diagram
Table 1. Signal names
XI Oscillator input
XO Oscillator output
FT/OUT Frequency test / output driver (open drain)
SDA Serial data input/output
SCL Serial clock input
V
BAT
Battery supply voltage
V
CC
Supply voltage
V
SS
Ground
SCL
V
CC
M41T00S
V
SS
SDA
FT/OUT
V
BAT
XI
XO
AI09165
Description M41T00S
6/28 Doc ID 10772 Rev 5
Figure 2. 8-pin SOIC connections
1. Open drain output
Figure 3. Block diagram
1. Open drain output
2
3
45
6
8
7
1
FT/OUT
(1)
SDA
V
BAT
SCL
V
SS
XO
XI
V
CC
M41T00S
AI09166
REAL TIME CLOCK
CALENDAR
RTC &
CALIBRATION
FREQUENCY TEST
OSCILLATOR FAIL
CIRCUIT
OUTPUT DRIVER
FT/OUT
(1)
INTERNAL
POWER
FT
OUT
SDA
SCL
V
CC
COMPARE
I
2
C
INTERFACE
32KHz
OSCILLATOR
V
BAT
CRYSTAL
V
SO
V
PFD
AI09168
WRITE
PROTECT
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28

M41T00SM6F

Mfr. #:
Buy M41T00SM6F
Manufacturer:
STMicroelectronics
Description:
Real Time Clock 2.0 to 5.5V 64 (8X8)
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet