27C256T
256K (32K x 8-Bit) OTP EPROM
1,2
TABLE 8. 27C256T AC ELECTRICAL CHARACTERISTICS FOR PROGRAMMING OPERATION
(VCC = 6.0V + 0.25V, V = 12.5V + 0.3V, TA = 25 °C)
PP
PARAMETER
Address Setup Time
SYMBOL
SUBGROUPS
MIN
TYP
MAX
UNIT
tAS
tAH
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
2
0
--
--
--
--
µs
µs
µs
µs
µs
µs
µs
ns
Address Hold Time
Data Setup Time
Data Hold Time
tDS
2
--
--
tDH
tVPS
tVCS
tOES
2
--
--
V Setup Time
2
--
--
PP
VCC Setup Time
2
--
--
Output Enable Setup Time
Output Disable Time
2
--
--
3
tDF
0
--
130
0.21
5.25
--
CE Initial Programming Pulse Width
CE Overprogramming Pulse Width
Output Enable Hold Time
tPW
tOPW
tOEH
tVR
0.19
0.19
2
0.20
--
ms
ms
µs
µs
µs
--
V Recovery Time
2
--
--
PP
Data Valid from Chip Enable
tDV
1
--
--
1. tDF 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
- Input rise and fall times
0.45V/2.4V
< 20 ns
- Referenced levels for measuring timing
0.8V/2.0V
1,2,3,4
TABLE 9. 27C256T DC ELECTRICAL CHARACTERISTICS FOR PROGRAMMING OPERATIONS
(VCC = 6.0V + 0.25V, V = 12.5V + 0.3V, TA = 25 °C)
PP
PARAMETER
TEST CONDITION
V =0V to V
SYMBOL SUBGROUPS
MIN
MAX
UNIT
Input Leakage Current
Operating VCC Current
ILI
ICC
IPP
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
--
--
2
µA
mA
mA
V
IN
CC
30
40
Operating V Current
CE=PGM=V
--
PP
IL
Input Voltage5
V
2.2
-0.17
2.4
--
V +0.56
IH
CC
V
0.8
--
IL
Output Voltage
IOH=-400µA
IOH= 2.1mA
V
V
OH
V
0.45
OL
1. VCC must be applied before V and removed after V .
PP
PP
2. V must not exceed 13V, including overshoot.
PP
3. Do not change V from V to 12.5V or 12.5V to V when CE = low.
PP
IL
IL
4. DC electrical parameters for programming operations are not tested. These are guaranteed by design.
5. Device reliability may be adversely affected if the device is installed or removed while V = 12.5V.
PP
06.24.03 REV 4
All data sheets are subject to change without notice
5
©2003 Maxwell Technologies
All rights reserved.
MAXWELL [ MAXWELL TECHNOLOGIES ]
