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參數(shù)資料
| 型號： | M27W256-100K6TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | PROM |
| 英文描述： | 32K X 8 OTPROM, 100 ns, PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁數(shù)： | 3/23頁 |
| 文件大?。?/td> | 236K |
| 代理商： | M27W256-100K6TR |
Obsolete
Product(s)
- Obsolete
Product(s)
M27W256
Device description
these two identifier bytes are given in Table 3 and can be read-out on outputs Q7 to Q0.
Note that the M27W256 and M27C256B have the same identifier bytes.
2.10
Erasure operation (applies for UV EPROM)
The erasure characteristics of the M27W256 is such that erasure begins when the cells are
exposed to light with wavelengths shorter than approximately 4000 . It should be noted
that sunlight and some type of fluorescent lamps have wavelengths in the 3000-4000
range. Research shows that constant exposure to room level fluorescent lighting could
erase a typical M27W256 in about 3 years, while it would take approximately 1 week to
cause erasure when exposed to direct sunlight. If the M27W256 is to be exposed to these
types of lighting conditions for extended periods of time, it is suggested that opaque labels
be put over the M27W256 window to prevent unintentional erasure. The recommended
erasure procedure for the M27W256 is exposure to short wave ultraviolet light which has
wavelength 2537. The integrated dose (i.e. UV intensity x exposure time) for erasure
should be a minimum of 15 W-sec/cm2. The erasure time with this dosage is approximately
15 to 20 minutes using an ultraviolet lamp with 12000 W/cm2 power rating. The M27W256
should be placed within 2.5 cm (1 inch) of the lamp tubes during the erasure. Some lamps
have a filter on their tubes which should be removed before erasure.
Table 3.
Electronic Signature
Identifier
A0
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Hex Data
Manufacturer’s
Code
VIL
0
01000
00
20h
Device Code
VIH
1
00011
01
8Dh
相關PDF資料 |
PDF描述 |
|---|---|
| M28804/11 | MALE, MULTIWAY RACK AND PANEL CONN, SOLDER, PLUG |
| M28804/1 | FEMALE, MULTIWAY RACK AND PANEL CONN, CRIMP, RECEPTACLE |
| M28804/2 | MALE, MULTIWAY RACK AND PANEL CONN, CRIMP, PLUG |
| M28804/3 | FEMALE, MULTIWAY RACK AND PANEL CONN, CRIMP, RECEPTACLE |
| M28804/4 | MALE, MULTIWAY RACK AND PANEL CONN, CRIMP, PLUG |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M27W256-100N6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27W256-120B6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27W256-120F6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27W256-120K6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27W256-120N6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
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