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參數(shù)資料
| 型號： | AT27C512R-90RC |
| 廠商： | ATMEL CORP |
| 元件分類： | DRAM |
| 英文描述： | 512K 64K x 8 OTP CMOS EPROM |
| 中文描述： | 64K X 8 OTPROM, 90 ns, PDSO28 |
| 封裝： | 0.330 INCH, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 249K |
| 代理商： | AT27C512R-90RC |
AC Programming Characteristics
T
A
= 25
±
5°C, V
CC
= 6.5
±
0.25V, OE/V
PP
= 13.0
±
0.25V
Sym-
bol
Parameter
Test
Condtions*
(1)
Limits
Units
Min
2
Max
t
AS
t
OES
t
OEH
t
DS
t
AH
t
DH
Address Setup Time
μ
s
OE/V
PP
Setup Time
2
μ
s
OE/V
PP
Hold Time
2
μ
s
Data Setup Time
2
μ
s
Address Hold Time
0
μ
s
Data Hold Time
CE High to
Output Float Delay
(2)
V
CC
Setup Time
CE Program Pulse Width
(3)
Data Valid from CE
(2)
2
μ
s
t
DFP
0
130
ns
t
VCS
t
PW
t
DV
t
VR
2
μ
s
95
105
μ
s
1
μ
s
OE/V
PP
Recovery Time
OE/V
PP
Pulse Rise
Time During Programming
2
μ
s
t
PRT
50
ns
*AC Conditions of Test:
Input Rise and Fall Times (10% to 90%).............. 20 ns
Input Pulse Levels....................................0.45V to 2.4V
Input Timing Reference Level....................0.8V to 2.0V
Output Timing Reference Level.................0.8V to 2.0V
Notes: 1. V
CC
must be applied simultaneously or before
OE/V
PP
and removed simultaneously or after
OE/V
PP
.
2. This parameter is only sampled and is not 100%
tested. Output Float is defined as the point where
data is no longer driven — see timing diagram.
3. Program Pulse width tolerance is 100
μ
sec
±
5%.
Atmel’s 27C512R Integrated
Product Identification Code
Codes
Pins
Hex
Data
A0
O7 O6 O5 O4 O3 O2 O1 O0
Manufacturer
Device Type
0
1
0
0
0
0
0
0
1
0
1
1
1
1
1
0
0
1
1E
0D
Rapid
Programming Algorithm
A 100
μ
s CE pulse width is used to program. The address
is set to the first location. V
CC
is raised to 6.5V and
OE/V
PP
is raised to 13.0V. Each address is first pro-
grammed with one 100
μ
s CE pulse without verification.
Then a verification/reprogramming loop is executed for
each address. In the event a byte fails to pass verification,
up to 10 successive 100
μ
s pulses are applied with a veri-
fication after each pulse. If the byte fails to verify after 10
pulses have been applied, the part is considered failed.
After the byte verifies properly, the next address is se-
lected until all have been checked. OE/V
PP
is then low-
ered to V
IL
and V
CC
to 5.0V. All bytes are read again and
compared with the original data to determine if the device
passes or fails.
AT27C512R
3-141
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