27c256 Microchip Technology Inc., 27c256 Datasheet - Page 2

• Manufacturer Part Number: 27c256
• Description: 256k 32k X 8 Cmos Eprom
• Manufacturer: Microchip Technology Inc.

27C256
1.0
1.1
V
V
programming ....................................... -0.6V to +14.0V
Voltage on A9 w.r.t. V
Output voltage w.r.t. V
Storage temperature ..........................-65°C to +150°C
Ambient temp. with power applied .....-65°C to +125°C
*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.
TABLE 1-2:
DS11001N-page 2
Input Voltages
Input Leakage
Output Voltages
Output Leakage
Input Capacitance
Output Capacitance
Power Supply Current,
Active
Power Supply Current,
Standby
I
V
* Parts: C=Commercial Temperature Range; I, E=Industrial and Extended Temperature Ranges
Note 1: Typical active current increases .75 mA per MHz up to operating frequency for all temperature ranges.
PP
CC
PP
PP
voltage w.r.t. V
Read Current
and input voltages w.r.t. V
Read Voltage
Parameter
ELECTRICAL CHARACTERISTICS
Maximum Ratings*
READ OPERATION DC CHARACTERISTICS
SS
SS
SS
during
...................... -0.6V to +13.5V
................-0.6V to V
Part*
I, E
I,E
all
all
all
all
all
all
all
all
all
C
C
SS
........ -0.6V to +7.25V
CMOS input
Read Mode
Read Mode
TTL input
TTL input
TTL input
TTL input
Logic "1"
Logic "0"
Logic "1"
Logic "0"
Status
—
—
—
—
CC
+1.0V
Symbol
I
C
CC
I
I
V
V
V
C
V
I
I
V
CC 1
CC 2
I
OUT
LO
PP
OH
LI
OL
PP
IH
IN
IL
(
S
V
Commercial:
Industrial:
Extended (Automotive):
)
CC
V
= +5V ( 10%)
CC
Min.
-0.5
-10
-10
2.0
2.4
—
—
—
—
—
TABLE 1-1:
-0.7
O0 - O7
A0-A14
Name
V
V
V
OE
NC
NU
CE
V
CC
Max.
PP
SS
0.45
V
CC
100
100
0.8
10
10
12
20
25
6
2
3
CC
+1
Units
mA
mA
mA
mA
pF
pF
Address Inputs
Chip Enable
Output Enable
Programming Voltage
Data Output
+5V Power Supply
Ground
No Connection; No Internal Connec-
tion
Not Used; No External Connection Is
Allowed
V
V
V
V
V
A
A
A
A
PIN FUNCTION TABLE
Tamb =
Tamb = -40°C to +85°C
Tamb = -40 C to +125 C
V
I
I
V
V
f = 1 MHz
V
f = 1 MHz
V
f = 1 MHz;
OE = CE = V
I
V
V
Note 1
CE = V
V
OH
OL
OUT
OUT
OUT
IN
IN
CC
IL
IH
PP
= 2.1 mA
= -0.1 to 0.8V;
= 0 to V
= -400 A
= 0V; Tamb = 25 C;
= 2.0 to V
2004 Microchip Technology Inc.
= 5.5V
= 5.5V; V
= 0 mA;
= 0V to V
= 0V; Tamb = 25 C;
CC
Function
0°C to +70°C
Conditions
CC
0.2V
IL
CC
PP
;
CC
;
= V
CC