M41ST84YMQ6 STMicroelectronics, M41ST84YMQ6 Datasheet - Page 20

• Manufacturer Part Number: M41ST84YMQ6
• Description: Real Time Clock Serial 512 (64x8)
• Manufacturer: STMicroelectronics

Specifications of M41ST84YMQ6

• Function: Clock, Calendar, Supervisor
• Rtc Memory Size: 64 B
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Package / Case: SO-16
• Time Format: HH:MM:SS:hh
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Clock operation
Figure 12. Crystal accuracy across temperature
Figure 13. Clock calibration
3.4
20/34
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
Frequency (ppm)
–100
–120
–140
–160
–20
–40
–60
–80
Setting alarm clock registers
Address locations 0Ah-0Eh contain the alarm settings. The alarm can be configured to go
off at a prescribed time on a specific month, date, hour, minute, or second, or repeat every
year, month, day, hour, minute, or second. It can also be programmed to go off while the
M41ST84W is in the battery backup to serve as a system wakeup call.
Bits RPT5-RPT1 put the alarm in the repeat mode of operation.
configurations. Codes not listed in the table default to the once per second mode to quickly
alert the user of an incorrect alarm setting.
20
0
–40
–30
–20
–10
0
10
Temperature °C
T
K = –0.036 ppm/°C
F
O
= 25°C ± 5°C
= K x (T –T
20
30
O
)
2
40
2
± 0.006 ppm/°C
50
60
Table 4
2
70
shows the possible
80
AI00999b
AI00594B
M41ST84W