SRAM
MT5C2568
AS5C2568
+5V
Austin Semiconductor, Inc.
+5V
ACTEST CONDITIONS
Input pulse levels....................................................Vss to 3V
Input rise and fall times.....................................................5ns
Input timing reference level.............................................1.5V
Output reference level......................................................1.5V
Output load.................................................See figures 1 & 2
480
480
Q
Q
30 pF
255
5 pF
255
Fig. 1
Fig. 2
OUTPUT LOAD
EQUIVALENT
OUTPUT LOAD
EQUIVALENT
NOTES
7. At any given temperature and voltage condition, tHZCE
1. All voltages referenced to VSS (GND).
2. -3V for pulse width < 20ns
is less thantLZCE, and HZWE is less than tLZWE.
t
3. ICC is dependent on output loading and cycle rates. The
specified value applies with the outputs unloaded, and
8. WE\ is HIGH for READ cycle.
9. Device is continuously selected. Chip enables and
output enables are held in their active state.
10. Address valid prior to, or coincident with, latest
occurring chip enable.
f =
1
Hz.
tRC (MIN)
4. This parameter is guaranteed but not tested.
5. Test conditions as specified with the output loading as
shown in Fig. 1 unless otherwise noted.
6. t HZCE, tHZOE and tHZWE are specified with CL = 5pF
as in Fig. 2. Transition is measured ±500mV typical from
steady state voltage, allowing for actual tester RC time
constant.
t
11. RC = Read Cycle Time.
12. Chip enable (CE\) and write enable (WE\) can initiate and
terminate a WRITE cycle.
DATA RETENTION ELECTRICAL CHARACTERISTICS (L Version Only)
DESCRIPTION
CONDITIONS
SYM
MIN
MAX
UNITS
NOTES
2
V
VCC for Retention Data
VDR
CE\ > (VCC-0.2V)
Data Retention Current
ICCDR
1
mA
VIN > (VCC-0.2V)
or < 0.2V
Chip Deselect to Data
Retention Time
tCDR
tR
0
--
ns
ns
4
Operation Recovery Time
4, 11
tRC
LOW Vcc DATA RETENTION WAVEFORM
DATA RETENTION MODE
VCC
4.5V
4.5V
VDR > 2V
t
tCDR
R
VIH
VIL
VDR
CE\
DON’T CARE
UNDEFINED
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
MT5C2568 / AS5C2568
Rev. 4.5 06/05
5
AUSTIN [ AUSTIN SEMICONDUCTOR ]
