UTRON
UT62W256C
Rev. 1.0
32K X 8 BIT LOW POWER CMOS SRAM
UTRON TECHNOLOGY INC. P80069
1F, No. 11, R&D Rd. II, Science-Based Industrial Park, Hsinchu, Taiwan, R. O. C.
TEL: 886-3-5777882 FAX: 886-3-5777919
3
CAPACITANCE
(TA=25
℃
, f=1.0MHz)
PARAMETER SYMBOL MIN. MAX UNIT
Input Capacitance C
IN
-
8 pF
Input/Output Capacitance C
I/O
-
10 pF
Note : These parameters are guaranteed by device characterization, but not production tested.
AC TEST CONDITIONS
Input Pulse Levels 0V to 3.0V
Input Rise and Fall Times 5ns
Input and Output Timing Reference Levels 1.5V
Output Load C
L
= 100pF, I
OH
/I
OL
= -1mA/4mA
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.7V~5.5V , TA = 0
℃
to 70
℃
)
(1) READ CYCLE
UT62W256C-35 UT62W256C-70
PARAMETER
SYMBOL
MIN. MAX. MIN. MAX.
UNIT
Read Cycle Time
t
RC
35 - 70 - ns
Address Access Time
t
AA
- 35 - 70 ns
Chip Enable Access Time
t
ACE
- 35 - 70 ns
Output Enable Access Time
t
OE
- 25 - 35 ns
Chip Enable to Output in Low Z
t
CLZ*
10 - 10 - ns
Output Enable to Output in Low Z
t
OLZ*
5 - 5 - ns
Chip Disable to Output in High Z
t
CHZ*
- 25 - 35 ns
Output Disable to Output in High Z
t
OHZ*
- 25 - 35 ns
Output Hold from Address Change
t
OH
5 - 5 - ns
(2) WRITE CYCLE
UT62W256C-35 UT62W256C-70
PARAMETER SYMBOL
MIN. MAX. MIN. MAX.
UNIT
Write Cycle Time
t
WC
35 - 70 - ns
Address Valid to End of Write
t
AW
30 - 60 - ns
Chip Enable to End of Write
t
CW
30 - 60 - ns
Address Set-up Time
t
AS
0 - 0 - ns
Write Pulse Width
t
WP
25 - 50 - ns
Write Recovery Time
t
WR
0 - 0 - ns
Data to Write Time Overlap
t
DW
20 - 30 - ns
Data Hold from End of Write Time
t
DH
0 - 0 - ns
Output Active from End of Write
t
OW*
5 - 5 - ns
Write to Output in High Z
t
WHZ*
- 15 - 25 ns
*These parameters are guaranteed by device characterization, but not production tested.