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AT27C256R-70PU Datasheet(PDF) 4 Page - ATMEL Corporation

Part # AT27C256R-70PU
Description  256K (32K x 8) One-time Programmable, Read-only Memory
Download  14 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT27C256R-70PU Datasheet(HTML) 4 Page - ATMEL Corporation

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4
0014O–EPROM–10/11
Atmel AT27C256R
Table 5-3.
DC and operating characteristics for read operation
Notes:
1. V
CC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP.
2. V
PP may be connected directly to VCC, except during programming. The supply current would then be the sum of ICC and
I
PP.
Table 5-4.
AC characteristics for read operation
Note:
1. See AC waveforms for read operation.
Symbol
Parameter
Condition
Min
Max
Units
I
LI
Input load current
V
IN = 0V to VCC
Ind.
±1
µA
Auto.
±5
µA
I
LO
Output leakage current
V
OUT = 0V to VCC
Ind.
±5
µA
Auto.
±10
µA
I
PP1
(2)
V
PP
(1) read/standby current
V
PP = VCC
10
µA
I
SB
V
CC
(1) standby current
I
SB1 (CMOS), CE = VCC  0.3V
100
µA
I
SB2 (TTL), CE = 2.0 to VCC + 0.5V
1
mA
I
CC
V
CC active current
f = 5MHz, I
OUT = 0mA, E = VIL
20
mA
V
IL
Input low voltage
-0.6
0.8
V
V
IH
Input high voltage
2.0
V
CC + 0.5
V
V
OL
Output low voltage
I
OL = 2.1mA
0.4
V
V
OH
Output high voltage
I
OH = -400µA
2.4
V
Symbol
Parameter
Condition
Atmel AT27C256R
Units
-45
-70
Min
Max
Min
Max
t
ACC
(1)
Address to output delay
CE = OE = V
IL
45
70
ns
t
CE
(1)
CE to output delay
OE = V
IL
45
70
ns
t
OE
(1)
OE to output delay
CE = V
IL
20
30
ns
t
DF
(1)
OE or CE high to output float, whichever occurred first
20
25
ns
t
OH
Output hold from address, CE or OE, whichever occurred
first
77
ns


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