256K (32K x 8-Bit) OTP EPROM
27C256T
T
ABLE
8. 27C256T AC E
LECTRICAL
C
HARACTERISTICS FOR
P
ROGRAMMING
O
PERATION 1,2
(V
CC
= 6.0V + 0.25V, V
PP
= 12.5V + 0.3V, T
A
= 25
°
C)
PARAMETER
Address Setup Time
Address Hold Time
Data Setup Time
Data Hold Time
V
PP
Setup Time
V
CC
Setup Time
Output Enable Setup Time
Output Disable Time
CE Initial Programming Pulse Width
CE Overprogramming Pulse Width
Output Enable Hold Time
V
PP
Recovery Time
Data Valid from Chip Enable
SYMBOL
t
AS
t
AH
t
DS
t
DH
t
VPS
t
VCS
t
OES
t
DF3
t
PW
t
OPW
t
OEH
t
VR
t
DV
SUBGROUPS
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
MIN
2
0
2
2
2
2
2
0
0.19
0.19
2
2
1
TYP
--
--
--
--
--
--
--
--
0.20
--
--
--
--
MAX
--
--
--
--
--
--
--
130
0.21
5.25
--
--
--
UNIT
µs
µs
µs
µs
µs
µs
µs
ns
ms
ms
µs
µs
µs
Memory
1. t
DF
is defined as the time at which the output becomes an open circuit and data is no longer driven.
2. AC electrical parameters for programming operations are not tested. These are guaranteed by design.
3. Test Conditions:
- Input pulse levels
0.45V/2.4V
- Input rise and fall times
< 20 ns
- Referenced levels for measuring timing
0.8V/2.0V
T
ABLE
9. 27C256T DC E
LECTRICAL
C
HARACTERISTICS FOR
P
ROGRAMMING
O
PERATIONS1,2,3,4
(V
CC
= 6.0V + 0.25V, V
PP
= 12.5V + 0.3V, T
A
= 25
°
C)
PARAMETER
Input Leakage Current
Operating V
CC
Current
Operating V
PP
Current
Input Voltage
5
Output Voltage
I
OH
=-400µ A
I
OH
= 2.1mA
1.
2.
3.
4.
5.
CE=PGM=V
IL
TEST CONDITION
V
IN
=0V to V
CC
SYMBOL SUBGROUPS
I
LI
I
CC
I
PP
V
IH
V
IL
V
OH
V
OL
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
MIN
--
--
--
2.2
-0.1
7
2.4
--
MAX
2
30
40
V
CC
+0.5
6
0.8
--
0.45
V
UNIT
µA
mA
mA
V
V
CC
must be applied before V
PP
and removed after V
PP
.
V
PP
must not exceed 13V, including overshoot.
Do not change V
PP
from V
IL
to 12.5V or 12.5V to V
IL
when CE = low.
DC electrical parameters for programming operations are not tested. These are guaranteed by design.
Device reliability may be adversely affected if the device is installed or removed while V
PP
= 12.5V.
06.24.03 REV 4
All data sheets are subject to change without notice
5
©2003 Maxwell Technologies
All rights reserved.
MAXWELL [ MAXWELL TECHNOLOGIES ]
