- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄368946 > 27C2001 (意法半導體) 2 Mbit 256Kb x 8 UV EPROM and OTP EPROM PDF資料下載
參數(shù)資料
| 型號： | 27C2001 |
| 廠商： | 意法半導體 |
| 英文描述： | 2 Mbit 256Kb x 8 UV EPROM and OTP EPROM |
| 中文描述： | 2兆位的256Kb × 8紫外線存儲器和OTP存儲器 |
| 文件頁數(shù)： | 9/17頁 |
| 文件大小： | 114K |
| 代理商： | 27C2001 |
9/17
M27C2001
Electronic Signature
The Electronic Signature (ES) mode allows the
reading out of a binary code from an EPROM that
will identify its manufacturer and type. This mode
is intended for use by programming equipment to
automatically matchthe device to be programmed
with its corresponding programming algorithm.
The ES mode is functional in the 25
°
C
±
5
°
C am-
bient temperaturerange that is required when pro-
gramming the M27C2001. To activate the ES
mode, the programming equipment must force
11.5V to 12.5V on address line A9 of the
M27C2001 with V
PP
= V
CC
= 5V. Two identifier
bytes maythen be sequenced fromthe device out-
puts bytoggling address line A0from V
IL
toV
IH
. All
other address lines must be held at V
IL
during
Electronic Signature mode. Byte 0 (A0 = V
IL
) rep-
resents the manufacturer code and byte 1
(A0 = V
IH
) the device identifier code. For the
STMicroelectronics M27C2001, these two identifi-
er bytes are given in Table 4 and can be read-out
on outputs Q7 to Q0.
ERASURE OPERATION (applies to UV EPROM)
The erasure characteristics of the M27C2001 are
such that erasure begins when the cells are ex-
posed to light with wavelengths shorter than ap-
proximately 4000 . It should be noted that
sunlight and some type of fluorescent lamps have
wavelengths in the 3000-4000 range. Data
shows that constant exposure to room level fluo-
rescent lighting could erase atypical M27C2001 in
about 3 years, while it would takeapproximately 1
week to cause erasure when exposed to direct
sunlight. If the M27C2001 is to be exposed to
these types of lighting conditions for extended pe-
riods of time, it is suggested that opaquelabels be
put over the M27C2001 window to prevent unin-
tentional erasure. The recommended erasure pro-
cedure for the M27C2001 is exposure to short
wave ultraviolet light which has wavelength of
2537 . The integrated dose (i.e. UV intensity x
exposure time) for erasure should be a minimum
of 15 W-sec/cm
2
. The erasure time with this dos-
age is approximately 15 to 20 minutes using an ul-
traviolet lamp with 12000
μ
W/cm
2
power rating.
The M27C2001 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.
相關PDF資料 |
PDF描述 |
|---|---|
| 27C2048 | Evaluation Kit for the MAX3869 |
| 27C210-12A | Evaluation Kit for the MAX3872, MAX3874 |
| 27C210-12FA | Evaluation Kit for the MAX3873A |
| 27C210-12N | Low-Power, Compact 2.5Gbps/2.7Gbps Clock-Recovery and Data-Retiming IC |
| 27C256RPDC-17 | Ultra-Low Offset Voltage Operational Amplifier |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 27C2001-10F1 | 制造商:STMicroelectronics 功能描述: |
| 27C2048 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2 Megabit (128k X 16-Bit) CMOS EPROM(173.55 k) |
| 27C210 | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:1M (64K x 16) CHMOS EPROM |
| 27C2100-12 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:2M-BIT [256Kx8/128x16] CMOS EPROM |
| 27C2100-15 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:2M-BIT [256Kx8/128x16] CMOS EPROM |
發(fā)布緊急采購，3分鐘左右您將得到回復。