M48T59-70PC1 STMicroelectronics, M48T59-70PC1 Datasheet - Page 15

• Manufacturer Part Number: M48T59-70PC1
• Description: Real Time Clock RO 511-M48T59Y70PC1
• Manufacturer: STMicroelectronics

Specifications of M48T59-70PC1

• Function: Clock, Calendar, NV Timekeeping RAM, Watchdog Timer, Battery Backup, Alarm
• Rtc Memory Size: 8192 B
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.75 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Parallel
• Package / Case: PDIP-28
• Time Format: HH:MM:SS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 8.
Figure 9.
3.5
Note:
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
Frequency (ppm)
–100
–120
–140
–160
Crystal accuracy across temperature
Clock calibration
Setting the alarm clock
Registers 1FF5h-1FF2h contain the alarm settings. The alarm can be configured to go off at
a prescribed time on a specific day of the month or repeat every month, day, hour, minute, or
second. It can also be programmed to go off while the M48T59/Y/V is in the battery back-up
mode of operation to serve as a system wake-up call.
Bits RPT1-RPT4 put the alarm in the repeat mode of operation.
the possible configurations. Codes not listed in the table default to the once per second
mode to quickly alert the user of an incorrect alarm setting.
User must transition address (or toggle chip enable) to see Flag Bit change.
When the clock information matches the alarm clock settings based on the match criteria
defined by RPT1-RPT4, AF (Alarm Flag) is set. If AFE (Alarm Flag Enable) is also set, the
–20
–40
–60
–80
20
0
–40
–30
–20
–10
0
10
Temperature C
F
= -0.038
20
T
30
0
ppm
= 25 C
C
2
(T - T
40
0
)
2
50
10%
60
Table 6 on page 16
70
80
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