NM27C256 Fairchild, NM27C256 Datasheet - Page 5

• Manufacturer Part Number: NM27C256
• Description: 262 /144-Bit (32K x 8) High Performance CMOS EPROM
• Manufacturer: Fairchild

Programming Characteristics
Programming Waveforms
Note 12: Fairchild’s standard product warranty applies to devices programmed to specifications described herein.
Note 13: V
voltage applied to V
Note 14: The maximum absolute allowable voltage which may be applied to the V
prevent any overshoot from exceeding this 14V maximum specification. At least a 0.1 F capacitor is required across V
which may damage the device.
Note 15: During power up the PGM pin must be brought high ( V
Symbol
t
t
t
V
t
CC
V
t
V
t
t
t
t
I
V
t
OES
VPS
VCS
t
I
T
t
OUT
t
PW
AS
DS
AH
DH
DF
OE
PP
CC
FR
CC
IN
PP
IH
IL
A
must be applied simultaneously or before V
PP
or V
CC
.
Address Setup Time
OE Setup Time
V
V
Data Setup Time
Address Hold Time
Data Hold Time
Output Enable to Output
Float Delay
Program Pulse Width
Data Valid from OE
V
during Programming Pulse
V
Temperature Ambient
Power Supply Voltage
Programming Supply Voltage
Input Rise, Fall Time
Input Low Voltage
Input High Voltage
Input Timing Reference Voltage
Output Timing Reference Voltage
PP
CC
PP
CC
ADDRESSES
Setup Time
Supply Current
Setup Time
Supply Current
Parameter
DATA
V
V
OE
CE
CC
PP
2.0V
0.8V
2.0V
0.8V
5.25V
12.75V
2.0V
0.8V
2.0V
0.8V
(Note 14)
PP
and removed simultaneously or after V
t
VCS
(Note 12) (Note 13) (Note 14) (Note 15) (Continued)
t
t
t
IH
VPS
AS
DS
) either coincident with or before power is applied to V
DATA IN STABLE
ADD N
t
PW
PROGRAM
PP
CE = V
CE = V
CE = V
Conditions
pin during programming is 14V. Care must be taken when switching the V
t
DH
ADDRESS N
5
IL
IL
IL
t
OES
PP
. The EPROM must not be inserted into or removed from a board with
t
OE
PROGRAM
Min
6.25
12.5
2.4
0.8
0.8
VERIFY
45
20
DATA OUT VALID
1
1
1
1
1
0
1
0
5
PP
ADD N
, V
PP
.
CC
to GND to suppress spurious voltage transients
12.75
Typ
6.5
0.0
4.0
t
50
25
AH
t
DF
Max
6.75
13.0
0.45
105
100
2.0
2.0
60
30
50
30
www.fairchildsemi.com
PP
supply to
Units
DS010833-5
mA
mA
ns
ns
ns
V
V
V
V
V
V
C
s
s
s
s
s
s
s
s