參數(shù)資料
型號(hào)： M41T256YMT7F
廠商： STMICROELECTRONICS
元件分類(lèi)： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： REAL TIME CLOCK, PDSO44
封裝： 0.330 INCH, LEAD FREE, PLASTIC, SOIC-44
文件頁(yè)數(shù)： 13/30頁(yè)
文件大小： 353K
代理商： M41T256YMT7F
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
Clock operation
M41T256Y
second either shortened by 128 or lengthened by 256 oscillator cycles. If a binary '1' is
loaded into the register, only the first 2 minutes in the 64 minute cycle will be modified; if a
binary 6 is loaded, the first 12 will be affected, and so on.
Therefore, each calibration step has the effect of adding 512 or subtracting 256 oscillator
cycles for every 125,829,120 actual oscillator cycles, that is +4.068 or –2.034 ppm of
adjustment per calibration step in the calibration register. Assuming that the oscillator is
running at exactly 32,768Hz, each of the 31 increments in the calibration byte would
represent +10.7 or –5.35 seconds per month which corresponds to a total range of +5.5 or –
2.75 minutes per month.
Figure 11.
Crystal accuracy across temperature
Figure 12.
Clock calibration
Two methods are available for ascertaining how much calibration a given M41T256Y may
require.
AI00999b
–160
0
10203040506070
Frequency (ppm)
Temperature
°C
80
–10
–20
–30
–40
–100
–120
–140
–40
–60
–80
20
0
–20
ΔF
= K x (T –TO)
2
K = –0.036 ppm/
°C2 ± 0.006 ppm/°C2
TO = 25°C ± 5°C
F
AI00594B
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
相關(guān)PDF資料
PDF描述
M41T56MH6F REAL TIME CLOCK, PDSO28
M41T60Q6F 1 TIMER(S), REAL TIME CLOCK, QCC16
M44C510-P40 4-BIT, MROM, MICROCONTROLLER, PDIP40
M44C510D-XXX-DOW 4-BIT, MROM, MICROCONTROLLER
M44C588 4-BIT, MROM, 4 MHz, MICROCONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M41T256YMT7TR 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:256 Kbit 32K x8 SERIAL RTC
M41T256YSH 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:256 Kbit 32K x8 SERIAL RTC
M41T315V 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Serial access phantom RTC supervisor
M41T315V/W 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Serial Access Phantom RTC Supervisor
M41T315V-65MH6E 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Serial Access Phantom RTC Supervisor
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*