Rainbow Electronics AT27C256R - Manual (Page 4)

AT27C256R
4
Notes: 1. V
CC
must be applied simultaneously with or before V
PP
, and removed simultaneously with or after V
PP
..
2. V
PP
may be connected directly to V
CC
, except during programming. The supply current would then be the sum of I
CC
and I
PP
..
Note: 2, 3, 4, 5. - see AC Waveforms for Read Operation.
DC and AC Operating Conditions for Read Operation
AT27C256R
-45 -55 -70 -90 -12 -15
Operating
Temp. (Case)
Com. 0
°
C - 70
°
C 0
°
C - 70
°
C 0
°
C - 70
°
C 0
°
C - 70
°
C 0
°
C - 70
°
C 0
°
C - 70
°
C
Ind. -40
°
C - 85
°
C -40
°
C - 85
°
C -40
°
C - 85
°
C -40
°
C - 85
°
C -40
°
C - 85
°
C -40
°
C - 85
°
C
Auto. -40
°
C - 125
°
C -40
°
C - 125
°
C -40
°
C - 125
°
C -40
°
C - 125
°
C
V
CC
Supply 5V
±
10% 5V
±
10% 5V
±
10% 5V
±
10% 5V
±
10% 5V
±
10%
DC and Operating Characteristics for Read Operation
Symbol Parameter Condition Min Max Units
I
LI
Input Load Current V
IN
= 0V to V
CC
Com., Ind.
±
1
µ
A
Auto.
±
5
µ
A
I
LO
Output Leakage Current V
OUT
= 0V to V
CC
Com., Ind.
±
5
µ
A
Auto.
±
10
µ
A
I
PP1
(2) V
PP
(1) Read/Standby Current V
PP
= V
CC
10
µ
A
I
SB
V
CC
(1) Standby Current
I
SB1
(CMOS), CE = V
CC
±
0.3V 100
µ
A
I
SB2
(TTL), CE = 2.0 to V
CC
+ 0.5V 1 mA
I
CC
V
CC
Active Current f = 5 MHz, I
OUT
= 0 mA, E = V
IL
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
= 2.1 mA 0.4 V
V
OH
Output High Voltage I
OH
= -400
µ
A 2.4 V
AC Characteristics for Read Operation
AT27C256R
Units
-45 -55 -70 -90 -12 -15
Symbol Parameter Condition Min Max Min Max Min Max Min Max Min Max Min Max
t
ACC
(3) Address to Output Delay CE = OE = V
IL
45 55 70 90 120 150 ns
t
CE
(2) CE to Output Delay OE = V
IL
45 55 70 90 120 150 ns
t
OE
(2)(3) OE to Output Delay CE = V
IL
20 25 30 30 35 40 ns
t
DF
(4)(5)
OE or CE High to Output
Float, whichever occurred first
20 20 25 25 30 35 ns
t
OH
Output Hold from Address, CE or OE,
whichever occurred first
7 7 7 0 0 0 ns