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參數(shù)資料
| 型號： | MKI41T56S00TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 105K |
| 代理商： | MKI41T56S00TR |
1/16
NOT FOR NEW DESIGN
November 2000
This is information on a product still in production but not recommended for new designs.
MK41T56
MKI41T56
512 bit (64b x8) Serial Access TIMEKEEPER SRAM
s
COUNTERS for SECONDS, MINUTES,
HOURS, DAY, DATE, MONTH and YEARS
s
SOFTWARE CLOCK CALIBRATION
s
AUTOMATIC POWER-FAIL DETECT and
SWITCH CIRCUITRY
s
I2C BUS COMPATIBLE
s
56 BYTES of GENERAL PURPOSE RAM
s
ULTRA-LOW BATTERY SUPPLY CURRENT
of 500nA
s
OPERATING TEMPERATURE:
– MK41T56: 0 to 70°C
– MKI41T56: –40 to 85°C
s
AUTOMATIC LEAP YEAR COMPENSATION
DESCRIPTION
The MK41T56 TIMEKEEPER is a low power 512
bit static CMOS RAM organized as 64 words by 8
bits. A built-in 32.768kHz oscillator (external crys-
tal controlled) and the first 8 bytes of the RAM are
used for the clock/calendar function and are con-
figured in binary coded decimal (BCD) format. Ad-
dresses and data are transferred serially via a two-
line bi-directional bus. The built-in address register
is incremented automatically after each write or
read data byte. The MK41T56 clock has a built-in
power sense circuit which detects power failures
and automatically switches to the battery supply
during power failures. The energy needed to sus-
tain the RAM and clock operations can be supplied
from a small lithium button cell.
Data retention time is in excess of 10 years with a
50mAh 3V lithium cell. The MK41T56 is supplied
in 8 pin Plastic Dual-in-Line and 8 lead Plastic
SOIC packages.
Figure 1. Logic Diagram
AI02304
OSCI
VCC
MK41T56
MKI41T56
VSS
SCL
OSCO
SDA
FT/OUT
VBAT
8
1
8
1
SO8 (M)
150mil Width
PSDIP8 (N)
0.4mm Frame
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