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M41T66 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 M41T66은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 M41T66 자료 제공

부품번호 M41T66 기능
기능 Serial real-time clock
제조업체 STMicroelectronics
로고 STMicroelectronics 로고


M41T66 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




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M41T66 데이터시트, 핀배열, 회로
M41T66
Serial real-time clock with alarms
Features
Counters for tenths/hundredths of seconds,
seconds, minutes, hours, day, date, month,
year, and century
32 KHz crystal oscillator integrating load
capacitance and high crystal series resistance
operation
Oscillator stop detection monitors clock
operation
Serial interface supports I2C bus (400 kHz)
525 nA timekeeping current at 3 V
Low operating current of 35 µA (at 400 kHz)
Timekeeping down to 1.0 V
1.3 V to 4.4 V I2C bus operating voltage
– Allows use in lithium ion rechargeable
applications
32 KHz square wave on power-up to drive a
microcontroller in low-power mode
Programmable (1 Hz to 32 KHz) square wave
Programmable alarm with interrupt function
Accurate programmable watchdog
(from 62.5 ms to 31 min)
Software clock calibration to compensate
deviation of crystal due to temperature
Automatic leap year compensation
Operating temperature of –40 to 85 °C
Lead-free 16-pin QFN package
www.DataSheet.net/
QFN16 3 mm x 3 mm
October 2011
Doc ID 15108 Rev 2
1/41
www.st.com
1
Datasheet pdf - http://www.DataSheet4U.co.kr/




M41T66 pdf, 반도체, 판매, 대치품
List of figures
List of figures
M41T66
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
M41T66 logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
M41T66 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
M41T66 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Hardware hookup for SuperCap™ backup operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Serial bus data transfer sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Acknowledgement sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Slave address location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Alternative READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
WRITE mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Calibration waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Alarm interrupt reset waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Crystal isolation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bus timing requirements sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
QFN16 – 16-lead, quad, flat package, no lead, 3 x 3 mm body size, outline . . . . . . . . . . . 28
QFN16 – 16-lead, quad, flat package, no lead, 3 x 3 mm, recommended footprint . . . . . . 29
32 KHz crystal + QFN16 vs. VSOJ20 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Carrier tape for QFN16 (3 mm x 3 mm) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reel schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
www.DataSheet.net/
4/34 Doc ID 15108 Rev 2
Datasheet pdf - http://www.DataSheet4U.co.kr/

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M41T66 전자부품, 판매, 대치품
M41T66
Description
Figure 4. Hardware hookup for SuperCap™ backup operation
6##

#
#
-4
6##
8) )21/54
8/ 317
633
3#,
3$!


-#5
6##
0ORT
317).
3ERIAL#LOCK,INE
3ERIAL$ATA,INE
!)B
1. Open drain
2. For a crystal with a load capacitance (CL) of 12.5 pF, two parallel external 12.5 pF capacitors (C1 and C2)
must be added to achieve better clock accuracy.
3. It can also be connected to another power supply.
4. Due to the output buffer circuitry used for the SQW output, this pin must not be taken to a voltage greater
than VCC. Diode required on SQW pin for SuperCap™ (or battery) backup. Low threshold BAT42 diode
recommended.
www.DataSheet.net/
Doc ID 15108 Rev 2
7/34
Datasheet pdf - http://www.DataSheet4U.co.kr/

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