|
|
PDF M41T66 Data sheet ( Hoja de datos )
| Número de pieza | M41T66 | |
| Descripción | Serial real-time clock | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de M41T66 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
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/
1 page  
M41T66
1 Description
Description
The M41T66 is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator
(external crystal controlled). Eight registers are used for the clock/calendar function and are
configured in binary coded decimal (BCD) format. An additional 8 registers provide
status/control of alarm, square wave, calibration, and watchdog functions. Addresses and
data are transferred serially via a two line, bidirectional I2C interface. The built-in address
register is incremented automatically after each WRITE or READ data byte.
Functions available to the user include a time-of-day clock/calendar, alarm interrupts,
programmable square wave output, and watchdog output. The eight clock address locations
contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a
second in 24-hour BCD format. Corrections for 28-, 29- (leap year), 30- and 31-day months
are made automatically.
The M41T66 is supplied in a 16-pin QFN.
Figure 1. M41T66 logic diagram
6##
8)
8/
3#,
3$!
-4
www.DataSheet.net/
)21/54
317
1. Open drain
2. Defaults to 32 KHz on power-up
633
!)
Doc ID 15108 Rev 2
5/34
Datasheet pdf - http://www.DataSheet4U.co.kr/
5 Page 
M41T66
Figure 7. Slave address location
27
34!24
3,!6% !$$2%33
!
Operation
!)
Figure 8. READ mode sequence
"53 !#4)6)49
-!34%2
3$! ,).%
3
7/2$
!$$2%33 !N
3
"53 !#4)6)49
3,!6%
!$$2%33
3,!6%
!$$2%33
www.DataSheet.net/
$!4! N
$!4! N
$!4! N 8
0
Figure 9. Alternative READ mode sequence
"53 !#4)6)49
-!34%2
3$! ,).%
3
"53 !#4)6)49
3,!6%
!$$2%33
$!4! N
$!4! N
Doc ID 15108 Rev 2
!)
$!4! N 8 0
!)
11/34
Datasheet pdf - http://www.DataSheet4U.co.kr/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet M41T66.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| M41T60 | Serial Access Real-Time Clock |  ST Microelectronics |
| M41T62 | (M41T62 - M41T65) Serial Access Real-Time Clock | ST Microelectronics |
| M41T63 | (M41T62 - M41T65) Serial Access Real-Time Clock | ST Microelectronics |
| M41T64 | (M41T62 - M41T65) Serial Access Real-Time Clock | ST Microelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |