DC and AC Operating Conditions for Read Operation
AT27C256R
-45
Operating
Temp. (Case)
V
CC
Supply
Com.
0°C - 70°C
5V
±
10%
Ind. -40°C - 85°C
-55
0°C - 70°C
-40°C - 85°C
5V
±
10%
-70
0°C - 70°C
-40°C - 85°C
5V
±
10%
-90
0°C - 70°C
-40°C - 85°C
5V
±
10%
-12
0°C - 70°C
-40°C - 85°C
5V
±
10%
-15
0°C - 70°C
-40°C - 85°C
5V
±
10%
DC and Operating Characteristics for Read Operation
Symbol
I
LI
I
LO
I
PP1
(2)
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
Parameter
Input Load Current
Output Leakage Current
Condition
V
IN
= 0V to V
CC
V
OUT
= 0V to V
CC
I
SB1
(CMOS), CE = V
CC
±
0.3V
I
SB2
(TTL), CE = 2.0 to V
CC
+ 0.5V
V
CC
Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
I
OL
= 2.1 mA
I
OH
= -400
µA
2.4
f = 5 MHz, I
OUT
= 0 mA,
CE = V
IL
-0.6
2.0
Min
Max
±1
±5
10
100
1
20
0.8
V
CC
+ 0.5
0.4
Units
µA
µA
µA
µA
mA
mA
V
V
V
V
V
PP
(1)
Read/Standby Current V
PP
= V
CC
V
CC
(1)
Standby Current
Notes: 1. V
CC
must be applied simultaneously or before V
PP
,
and removed simultaneously or after V
PP
.
2. V
PP
may be connected directly to V
CC
, except during program-
ming. The supply current would then be the sum of I
CC
and I
PP
.
AC Characteristics for Read Operation
AT27C256R
-45
Symbol
t
ACC (3)
t
CE (2)
t
OE (2, 3)
t
DF (4, 5)
t
OH
Notes:
-55
Min
Max
-70
Min
Max
-90
Min
Max
-12
Min
Max
-15
Min
Max
Parameter
Address to
Output Delay
CE to Output Delay
OE to Output Delay
Condition
CE = OE
= V
IL
OE = V
IL
CE = V
IL
Min
Max
Units
ns
ns
ns
ns
ns
45
45
20
20
7
7
55
55
25
20
7
70
70
30
25
0
90
90
30
25
0
120
120
35
30
0
150
150
40
35
OE or CE High to
Output Float, whichever occurred first
Output Hold from
Address, CE or OE,
whichever occurred first
2, 3, 4, 5. - see AC Waveforms for Read Operation.
3-128
AT27C256R
ATMEL [ ATMEL CORPORATION ]
