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부품번호 | M41T62 기능 |
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기능 | (M41T62 - M41T65) Serial Access Real-Time Clock | ||
제조업체 | ST Microelectronics | ||
로고 | |||
전체 30 페이지수
www.DataSheet4U.com
M41T62, M41T63
M41T64, M41T65
Serial Access Real-Time Clock with Alarms
Feature summary
■ 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 (400kHz)
■ 350nA timekeeping current @ 3V
■ Low operating current of 35µA (@400kHz)
■ Timekeeping down to 1.0V
■ 1.3V to 4.4V I2C bus operating voltage
■ 32KHz square wave on power-up to drive a
microcontroller in low power mode
(M41T62/63/64)
■ Programmable (1Hz to 32KHz) square wave
(M41T63/64)
■ Programmable alarm with interrupt function
(M41T62/65)
■ Accurate programmable watchdog
(from 62.5ms to 31 min)
■ Software clock calibration to compensate
deviation of crystal due to temperature
■ Automatic leap year compensation
QFN16 (Q) 3mm x 3mm
VSOJ20 (47.6mm2)
GND Plane Guard Ring (21.5mm2)
SMT
CRYSTAL
1 XI
2 XO
3
4 ST QFN16
AI11107
32KHz crystal + QFN 16 vs. VSOJ20
■ Operating temperature of –40 to 85°C
■ Lead-free 16-pin QFN package
■ Lithium ion rechargeable operation
Table 1. Device options
Basic RTC Alarms
M41T62
M41T63
M41T64
M41T65
✔
✔
✔
✔
✔
✔
✔
✔
Table 1
OSC fail
detect
✔
✔
✔
✔
Watchdog
timer
Calibration
SQW
output
✔ ✔✔
✔ ✔✔
✔ ✔✔
✔✔
IRQ WDO F32K
output output output
✔
✔
✔
✔✔
August 2006
Rev 11
1/41
www.st.com
1
List of figures
List of figures
M41T62/63/64/65
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.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
M41T62 logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
M41T64 logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
M41T63 logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
M41T65 logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
M41T62 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
M41T63 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
M41T64 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
M41T65 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
M41T62 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
M41T63 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
M41T64 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
M41T65 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Hardware hookup for SuperCap™ back-up operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Serial bus data transfer sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Acknowledgement sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Slave address location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Alternative READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
WRITE mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Calibration waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Alarm interrupt reset waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Crystal isolation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Bus timing requirements sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
QFN16 – 16-lead, Quad, Flat Package, no Lead, 3x3mm body size, outline . . . . . . . . . . . 35
QFN16 – 16-lead, Quad, Flat Package, no Lead, 3x3mm, recommended footprint. . . . . . 36
32KHz crystal + QFN16 vs. VSOJ20 mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4/40
4페이지 M41T62/63/64/65
Figure 4. M41T65 logic diagram
VCC
Summary description
XI
XO
SCL
SDA
M41T65
WDO(1)
IRQ/FT/OUT(1)
1. Open drain.
Figure 5. M41T62 connections
VSS
AI09109
16 15 14 13
XI 1
12 NC
XO 2
11 IRQ/OUT(2)
VSS 3
10 SCL
SQW(1) 4
9 SDA
5678
1. SQW output defaults to 32KHz upon power-up.
2. Open drain.
AI09100
7/40
7페이지 | |||
구 성 | 총 30 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
M41T60 | Serial Access Real-Time Clock | ST Microelectronics |
M41T62 | (M41T62 - M41T65) Serial Access Real-Time Clock | ST Microelectronics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |