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参数资料
| 型号： | M27C256B-15XB6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | PROM |
| 英文描述： | 32K X 8 OTPROM, 150 ns, PDIP28 |
| 封装： | 0.600 INCH, LEAD FREE, PLASTIC, DIP-28 |
| 文件页数： | 3/24页 |
| 文件大小： | 205K |
| 代理商： | M27C256B-15XB6 |
M27C256B
Device operation
2.10
Erasure operation (applies for UV EPROM)
The erasure characteristics of the M27C256B 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 M27C256B in about 3 years, while it would take approximately 1 week to
cause erasure when exposed to direct sunlight. If the M27C256B 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 M27C256B window to prevent unintentional erasure. The recommended
erasure procedure for the M27C256B 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 M27C256B
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 2.
Operating modes(1)
1.
X = VIH or VIL, VID = 12V ± 0.5V.
Mode
E
G
A9
VPP
Q7-Q0
Read
VIL
XVCC
Data Out
Output Disable
VIL
VIH
XVCC
Hi-Z
Program
VIL Pulse
VIH
XVPP
Data In
Verify
VIH
VIL
XVPP
Data Out
Program Inhibit
VIH
XVPP
Hi-Z
Standby
VIH
XX
VCC
Hi-Z
Electronic Signature
VIL
VID
VCC
Codes
Table 3.
Electronic signature
Identifier
A0
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Hex Data
Manufacturer’s
Code
VIL
00
10
00
20h
Device Code
VIH
10
00
11
01
8Dh
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M27C256B-15XF1 | 制造商:STMicroelectronics 功能描述:EPROM, 32K x 8, 28 Pin, Ceramic, DIP |
| M27C256B-20B1 | 功能描述:可擦除可编程ROM RO 511-M27C256B-15B DIP-28 32KX8 200NS RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92 |
| M27C256B-20C1 | 功能描述:可擦除可编程ROM RO 511-M27C256B-15C PLCC-32 32KX8 200NS RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92 |
| M27C256B-20F1 | 功能描述:可擦除可编程ROM RO 511-M27C256B-15F DIP-28 32KX8 200NS RoHS:否 制造商:Maxim Integrated 类型: 存储容量:1024 bit 组织:1 K x 1 接口类型: 工作电流:5 uA 编程电压: 工作电源电压:2.8 V to 6 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:TO-92 |
| M27C256B20FI | 制造商:ST MICRO 功能描述:* |
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