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參數(shù)資料
| 型號： | M27C405-100B1TR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 4 Mbit 512Kb x 8 OTP EPROM |
| 中文描述： | 4兆位× 8檢察官辦公室512KB的存儲器 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 99K |
| 代理商： | M27C405-100B1TR |
tAVPL
VALID
AI00725
A0-A18
Q0-Q7
VPP
VCC
G
DATA IN
DATA OUT
E
tQVEL
tVPHEL
tVCHEL
tEHQX
tELEH
tGLQV
tQXGL
tGHQZ
tGHAX
PROGRAM
VERIFY
Figure 6. Programmingand VerifyModes AC Waveforms
SystemConsiderations
The power switching characteristics of Advanced
CMOS OTP EPROMs require careful decoupling of
the devices. The supply current, I
CC
, has three
segments that are of interest to the system de-
signer:thestandbycurrentlevel,theactivecurrent
level, and transient current peaks that are pro-
duced by the falling and rising edges of E. The
magnitude of the transient current peaks is de-
pendenton the capacitiveand inductiveloading of
the device at the output.
The associated transient voltage peaks can be
suppressed by complying with the two line output
control and by properly selected decoupling ca-
pacitors. It is recommendedthat a 0.1
μ
F ceramic
capacitor be used on every device between V
CC
andV
SS
. Thisshouldbea highfrequencycapacitor
of low inherent inductance and should be placed
as close to the device as possible. In addition, a
4.7
μ
F bulk electrolytic capacitor should be used
betweenV
CC
andV
SS
foreveryeight devices.The
bulk capacitor should be located near the power
supply connection point.The purpose of the bulk
capacitoris to overcome the voltage drop caused
by the inductiveeffectsof PCBtraces.
Programming
When delivered,all bitsof the M27C405are in the
’1’state.Datais introducedbyselectivelyprogram-
ming ’0’s into the desired bit locations. Although
only’0’swillbe programmed,both’1’sand ’0’scan
be present in the data word. The M27C405 is in
the programming mode when V
PP
input is at
12.75V,G is atV
IH
andE ispulsedto V
IL
. The data
to be programmedis appliedto 8 bitsin parallelto
the data output pins. The levels required for the
addressand data inputs are TTL.V
CC
is specified
to be 6.25V
±
0.25V.
8/15
M27C405
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| M27C405-120K1 | 功能描述:可擦除可編程ROM 4M (512Kx8) 120ns RoHS:否 制造商:Maxim Integrated 類型: 存儲容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-92 |
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| M27C512 90F6 | 制造商:ST(SGS) 功能描述: |
| M27C512-10C1 | 功能描述:可擦除可編程ROM 512K (64Kx8) 100ns RoHS:否 制造商:Maxim Integrated 類型: 存儲容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-92 |
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