M41T65Q6F STMicroelectronics, M41T65Q6F Datasheet - Page 28

• Manufacturer Part Number: M41T65Q6F
• Description: IC RTC SERIAL W/ALARM 16QFN
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T65Q6F

• Memory Size: 16B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.3 V ~ 4.4 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Function: Clock/Calendar/Alarm/Timer Interrupt
• Rtc Memory Size: 16 Byte
• Supply Voltage (max): 4.4 V
• Supply Voltage (min): 1.3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial (2-Wire, I2C)
• Supply Current: 50 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3908-2

Clock operation
3.6
3.7
28/41
Square wave output (M41T62/63/64)
The M41T62/63/64 offers the user a programmable square wave function which is output on
the SQW pin. RS3-RS0 bits located in 04h establish the square wave output frequency.
These frequencies are listed in
completed, the SQW pin can be turned on and off under software control with the square
wave enable bit (SQWE) located in register 0Ah.
The SQW output is an N-channel, open drain output driver for the M41T64, and a full CMOS
output driver for the M41T62/63. The initial power-up default for the SQW output is 32 KHz
(except for M41T64, which defaults disabled).
Table 8.
Full-time 32 KHz square wave output (M41T64)
The M41T64 offers the user a special 32 KHz square wave function which is enabled on
power-up to output on the F
(ST bit = '0'). This function is available within one second (typ) of initial power-up and can
only be disabled by setting the 32KE bit to '0' or the ST bit to '1.' If not used, the F
should be disconnected and allowed to float.
RS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Square wave output frequency
RS2
Square wave bits
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
32K
Doc ID 10397 Rev 14
Table
pin as long as V
RS1
8. Once the selection of the SQW frequency has been
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CC
≥ 1.3 V, and the oscillator is running
RS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Frequency
32.768
8.192
4.096
2.048
1.024
None
512
256
128
64
32
16
8
4
2
1
Square wave
M41T62/63/64/65
32K
Units
kHz
kHz
kHz
kHz
kHz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
–
pin