M41T80M6E STMicroelectronics, M41T80M6E Datasheet - Page 17

• Manufacturer Part Number: M41T80M6E
• Description: IC RTC SERIAL W/ALARM 8-SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T80M6E

• Memory Size: 20B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Function: Clock/Calendar/Alarm/Timer Interrupt
• Rtc Memory Size: 20 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial (2-Wire, I2C)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2820-5; M41T80M6

M41T80
3.5
Note:
3.6
Output driver pin
When the AFE bit and SQWE bit are not set, the IRQ/OUT/SQW pin becomes an output
driver that reflects the contents of D7 of the control register. In other words, when D7 (OUT
bit) of address location 08h is a '0,' then the IRQ/OUT/SQW pin will be driven low.
The IRQ/OUT/SQW pin is an open drain which requires an external pull-up resistor.
Preferred power-on default
When powering the device up from ground (0 V), the following register bits are set to a '0'
state: ST; AFE; and SQWE. The following bits are set to a '1' state: OUT and 32KE (see
Table 6: Preferred power-on default values on page
Table 6.
1. If V
Power-up
CC
falls to a voltage, 0 V < V
(1)
Condition
Preferred power-on default values
CC
Doc ID 9074 Rev 4
< 2.0 V, these bits should be rewritten by the user.
ST
0
OUT
1
17).
AFE
0
SQWE
0
Clock operation
32KE
1
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