參數(shù)資料
型號： MB90223
廠商： Fujitsu Limited
英文描述： 8-Bit Proprietary Microcontroller(8位專用微控制器)
中文描述： 8位微控制器專利（8位專用微控制器）
文件頁數(shù)： 19/105頁
文件大?。?/td> 1130K
代理商： MB90223
19
MB90220 Series
4. Erase Procedure
Data written in the MB90W224A/W224B is erased (from “0” to “1”) by exposing the chip to ultraviolet rays with
a wavelength of 2,537 through the translucent cover.
Recommended irradiation dosage for exposure is 10 Wsec/cm
2
. This amount is reached in 15 to 20 minutes
with a commercial ultraviolet lamp positioned 2 to 3 cm above the package (when the package surface illuminance
is 1200
μ
W/cm
2
).
If the ultraviolet lamp has a filter, remove the filter before exposure. Attaching a mirrored plate to the lamp
increases the illuminance by a factor of 1.4 to 1.8, thus shortening the required erasure time. If the translucent
part of the package is stained with oil or adhesive, transmission of ultraviolet rays is degraded, resulting in a
longer erasure time. In that case, clean the translucent part using alcohol (or other solvent not affecting the
package).
The above recommended dosage is a value which takes the guard band into consideration and is a multiple of
the time in which all bits can be evaluated to have been erased. Observe the recommended dosage for erasure;
the purpose of the guard band is to ensure erasure in all temperature and supply voltage ranges. In addition,
check the life span of the lamp and control the illuminance appropriately.
Data in the MB90W224A/W224B is erased by exposure to light with a wavelength of 4,000 or less.
Data in the device is also erased even by exposure to fluorescent lamp light or sunlight although the exposure
results in a much lower erasure rate than exposure to 2,537 ultraviolet rays. Note that exposure to such lights
for an extended period will therefore affect system reliability. If the chip is used where it is exposed to any light
with a wavelength of 4,000 or less, cover the translucent part, for example, with a protective seal to prevent
the chip from being exposed to the light.
Exposure to light with a wavelength of 4,000 to 5,000 or more will not erase data in the device. If the light
applied to the chip has a very high illuminance, however, the device may cause malfunction in the circuit for
reasons of general semiconductor characteristics. Although the circuit will recover normal operation when
exposure is stopped, the device requires proper countermeasures for use in a place exposed continuously to
such light even though the wavelength is 4,000 or more.
5. Recommended Screening Conditions
High temperature aging is recommended as the pre-assembly screening procedure.
6. Programming Yeild
MB90P224A/P224B cannot be write-tested for all bits due to their nature. Therefore the write yield cannot always
be guaranteed to be 100%.
Program, verify
Aging
+150
°
C, 48 Hrs.
Data verification
Assembly
相關(guān)PDF資料
PDF描述
MB90P224B 8-Bit Proprietary Microcontroller(8位專用微控制器)
MB90P224BPF 16-Bit Edge-Triggered D-type Flip-Flops With 3-State Outputs 48-CFP -55 to 125
MB90W224A 16-bit Proprietary Microcontroller
MB90W224B 16-bit Proprietary Microcontroller
MB90W224BZF 16-bit Proprietary Microcontroller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB90223PF 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
MB90224 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
MB90224PF 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
MB90233 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
MB90233PFV 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

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

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

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*