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參數(shù)資料
| 型號： | NM27C256QE90 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 262,144-Bit (32K x 8) High Performance CMOS EPROM |
| 中文描述： | 262,144位（32K的× 8）高性能CMOS存儲器 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 125K |
| 代理商： | NM27C256QE90 |
5
www.fairchildsemi.com
N
Programming Characteristics
(Note 12) (Note 13) (Note 14) (Note 15) (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
t
AS
t
OES
t
VPS
t
VCS
t
DS
t
AH
t
DH
t
DF
Address Setup Time
1
μ
s
OE Setup Time
1
μ
s
μ
s
V
PP
Setup Time
V
CC
Setup Time
Data Setup Time
1
1
μ
s
1
μ
s
μ
s
Address Hold Time
0
Data Hold Time
1
μ
s
Output Enable to Output
Float Delay
CE = V
IL
0
60
ns
t
PW
t
OE
I
PP
Program Pulse Width
45
50
105
μ
s
Data Valid from OE
CE = V
IL
CE = V
IL
100
ns
V
PP
Supply Current
during Programming Pulse
30
mA
I
CC
T
A
V
CC
V
PP
t
FR
V
IL
V
IH
t
IN
t
OUT
V
CC
Supply Current
Temperature Ambient
50
mA
20
25
30
°
C
Power Supply Voltage
6.25
6.5
6.75
V
Programming Supply Voltage
12.5
12.75
13.0
V
Input Rise, Fall Time
5
ns
Input Low Voltage
0.0
0.45
V
Input High Voltage
2.4
4.0
V
Input Timing Reference Voltage
0.8
2.0
V
Output Timing Reference Voltage
0.8
2.0
V
Programming Waveforms
(Note 14)
Note 12:
Fairchild’s standard product warranty applies to devices programmed to specifications described herein.
Note 13:
V
must be applied simultaneously or before V
PP
and removed simultaneously or after V
PP
. The EPROM must not be inserted into or removed from a board with
voltage applied to V
PP
or V
CC
.
Note 14:
The maximum absolute allowable voltage which may be applied to the V
pin during programming is 14V. Care must be taken when switching the V
supply to
prevent any overshoot from exceeding this 14V maximum specification. At least a 0.1
μ
F capacitor is required across V
PP
, V
CC
to GND to suppress spurious voltage transients
which may damage the device.
Note 15:
During power up the PGM pin must be brought high (
≥
V
IH
) either coincident with or before power is applied to V
PP
.
ADDRESS N
DATA IN STABLE
ADD N
DATA OUT VALID
ADD N
2.0V
0.8V
2.0V
0.8V
5.25V
12.75V
2.0V
2.0V
ADDRESSES
DATA
CE
V
PP
V
CC
OE
t
OE
t
OES
t
PW
t
VPS
t
VCS
t
DS
t
AS
t
AH
t
DF
t
DH
PROGRAM
PVERIFY
DS010833-5
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