27LV256
TABLE 1-1:
Name
PIN FUNCTION TABLE
Function
1.0
ELECTRICAL
CHARACTERISTICS
1.1
Maximum Ratings*
A0-A14
CE
Address Inputs
Chip Enable
VCC and input voltages w.r.t. VSS ........-0.6V to +7.25V
VPP voltage w.r.t. VSS during
programming .........................................-0.6V to +14V
OE
Output Enable
Programming Voltage
Data Output
VPP
Voltage on A9 w.r.t. VSS.......................-0.6V to +13.5V
Output voltage w.r.t. VSS.................-0.6V to VCC +1.0V
Storage temperature .......................... -65˚C to +150˚C
Ambient temp. with power applied...... -65˚C to +125˚C
O0 - O7
VCC
+5V or +3V Power Supply
Ground
VSS
*Notice: Stresses above those listed under “Maximum Ratings”
may cause permanent damage to the device. This is a stress rat-
ing only and functional operation of the device at those or any
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.
NC
No Connection; No Internal
Connection
NU
Not Used; No External Connection Is
Allowed
TABLE 1-2:
READ OPERATION DC CHARACTERISTICS
VCC = +5V ±10% or 3.0V where indicated
Commercial:
Industrial:
Tamb = 0˚C to +70˚C
Tamb = -40˚C to +85˚C
Parameter
Part*
Status
Symbol Min.
Max.
Units Conditions
Input Voltages
all
Logic "1"
Logic "0"
VIH
VIL
2.0
-0.5
VCC+1
0.8
V
V
Input Leakage
all
all
ILI
-10
2.4
10
µA VIN = 0 to VCC
Output Voltages
Logic "1"
Logic "0"
VOH
VOL
V
V
IOH = -400 µA
IOL = 2.1 mA
0.45
10
6
Output Leakage
all
all
—
—
ILO
-10
—
µA VOUT = 0V to VCC
Input Capacitance
CIN
pF VIN = 0V; Tamb = 25°C;
f = 1 MHz
Output Capacitance
all
—
COUT
—
12
pF VOUT = 0V; Tamb = 25°C;
f = 1 MHz
Power Supply Current,
Active
C
I
TTL input
TTL input
ICC1
ICC2
—
—
20 @ 5.0V
8 @ 3.0V
25 @ 5.0V
10 @ 3.0V
mA VCC = 5.5V; VPP = VCC
mA f = 1 MHz;
mA OE = CE = VIL;
mA IOUT = 0 mA;
VIL = -0.1 to 0.8V;
VIH = 2.0 to VCC;
Note 1
Power Supply Current,
Standby
C
I
TTL input
TTL input
ICC(S)
—
1 @ 3.0V
2 @ 3.0V
mA
mA
all
CMOS input
100 @ 3.0V µA CE=VCC ± 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.
DS11020G-page 2
1998 Microchip Technology Inc.
This Material Copyrighted by Its Respective Manufacturer