
27LV256
DS11020G-page 2
1998 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
1.1
Maximum Ratings*
V
V
programming.........................................-0.6V to +14V
Voltage on A9 w.r.t. V
SS
.......................-0.6V to +13.5V
Output voltage w.r.t. V
SS
.................-0.6V to V
Storage temperature ..........................-65C to +150C
Ambient temp. with power applied......-65C to +125C
CC
and input voltages w.r.t. V
voltage w.r.t. V
SS
........-0.6V to +7.25V
PP
SS
during
CC
+1.0V
*Notice: Stresses above those listed under “Maximum Ratings”
may cause permanent damage to the device. This is a stress rat-
other conditions above those indicated in the operation listings of
this specification is not implied. Exposure to maximum rating con-
ditions for extended periods may affect device reliability.
TABLE 1-1:
PIN FUNCTION TABLE
Name
Function
A0-A14
Address Inputs
CE
Chip Enable
OE
Output Enable
V
PP
Programming Voltage
O0 - O7
Data Output
V
CC
+5V or +3V Power Supply
V
SS
Ground
NC
No Connection; No Internal
Connection
NU
Not Used; No External Connection Is
Allowed
TABLE 1-2:
READ OPERATION DC CHARACTERISTICS
V
Commercial:
Industrial:
CC
= +5V
±
10% or 3.0V where indicated
Tamb = 0C to +70C
Tamb = -40C to +85C
Parameter
Part*
Status
Symbol
Min.
Max.
Units
Conditions
Input Voltages
all
Logic "1"
Logic "0"
V
V
I
V
V
I
C
IH
IL
2.0
-0.5
-10
2.4
V
CC
0.8
10
+1
V
V
μ
V
V
μ
pF
Input Leakage
Output Voltages
all
all
LI
A
V
I
OH
I
OL
V
OUT
V
IN
f = 1 MHz
V
OUT
f = 1 MHz
V
CC
= 5.5V; V
f = 1 MHz;
OE = CE = V
I
OUT
= 0 mA;
V
IL
= -0.1 to 0.8V;
V
IH
= 2.0 to V
Note 1
IN
= 0 to V
= -400
= 2.1 mA
= 0V to V
= 0V; Tamb = 25
CC
μ
A
Logic "1"
Logic "0"
—
—
OH
OL
0.45
10
6
Output Leakage
Input Capacitance
all
all
LO
-10
—
A
CC
IN
°
C;
Output Capacitance
all
—
C
OUT
—
12
pF
= 0V; Tamb = 25
°
C;
Power Supply Current,
Active
C
I
TTL input
TTL input
I
CC
1
I
CC
2
—
—
20 @ 5.0V
8 @ 3.0V
25 @ 5.0V
10 @ 3.0V
mA
mA
mA
mA
PP
= V
CC
IL
;
CC
;
Power Supply Current,
Standby
C
I
all
TTL input
TTL input
CMOS input
I
CC
(
S
)
—
1 @ 3.0V
2 @ 3.0V
100 @ 3.0V
mA
mA
μ
A
CE=V
CC
±
0.2V
* Parts: C=Commercial Temperature Range
I =Industrial Temperature Ranges
Note 1: Typical active current increases .75 mA per MHz up to operating frequency for all temperature ranges.
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