256K EEPROM (32K x 8-Bit) EEPROM
T
ABLE
4. 28C256T R
ECOMMENDED
O
PERATING
C
ONDITIONS
P
ARAMETER
Supply Voltage
Input Voltage
S
UBGROUPS
1
1
1
1
Thermal Impedance — Flat Package
Thermal Impedance — DIP Package
Operating Temperature Range
1. V
IL
min= -1.0V for pulse width < 50 ns.
1
1
1
S
YMBOL
V
CC
V
IL
V
IH
V
H
M
IN
4.5
-0.3
1
2.2
V
CC
-0.5
--
--
-55
28C256T
M
AX
5.5
0.8
V
CC
+0.3
V
CC
+1
0.87
0.86
125
U
NITS
V
V
V
V
°C/W
°C/W
°
C
Θ
JC
Θ
JC
T
OPR
T
ABLE
5. 28C256T C
APACITANCE
1
(T
A
= 25
°
C, f = 1 MHz)
P
ARAMETER
Input Capacitance: V
IN
= 0V
1
Output Capacitance: V
OUT
= 0V
1. Guaranteed by design.
S
YMBOL
C
IN
C
OUT
M
IN
--
--
M
AX
6
12
U
NITS
pF
pF
Memory
T
ABLE
6. 28C256T DC E
LECTRICAL
C
HARACTERISTICS
(V
CC
= 5 V ± 10%, T
A
= -55
TO
+125
°
C
UNLESS OTHERWISE SPECIFIED
)
P
ARAMETER
Input Leakage Current
Output Leakage Current
Standby V
CC
Current
Operating V
CC
Current
C
ONDITIONS
V
CC
= 5.5 V, V
IN
= 5.5 V
V
CC
= 5.5 V, V
OUT
= 5.5 V/0.4 V
CE = V
CC
CE = V
IH
I
OUT
= 0 mA Duty = 100%
V
CC
= 5.5 V Cycle = 1 us
I
OUT
= 0mA Duty = 100%
V
CC
= 5.5 V Cycle = 150 ns
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
I
LO
= 2.1 mA
I
OH
= -400 uA
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
V
IL
V
IH
V
H
V
OL
V
OH
S
UBGROUPS
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
S
YMBOL
I
LI
I
LO
I
CC1
I
CC2
I
CC3
M
IN
--
--
--
--
--
--
--
2.2
V
CC
-0.5
--
2.4
M
AX
2
2
20
1
15
50
0.8
--
--
0.4
--
V
V
V
V
V
U
NITS
uA
uA
uA
mA
mA
02.18.02 Rev5
All data sheets are subject to change without notice
3
©2001 Maxwell Technologies
All rights reserved.
MAXWELL [ MAXWELL TECHNOLOGIES ]
