STC62WV2568 Datasheet, PDF (4/9 Pages) List of Unclassifed Manufacturers – Very Low Power/Voltage CMOS SRAM 256K X 8 bit

STC
„AC TEST CONDITIONS
(Test Load and Input/Output Reference)
Input Pulse Levels
Vcc / 0V
Input Rise and Fall Times
1V/ns
Input and Output
Timing Reference Level
Output Load
0.5Vcc
CL = 100pF+1TTL
CL = 30pF+1TTL
STC62WV2568
„ KEY TO SWITCHING WAVEFORMS
WAVEFORM
INPUTS
MUST BE
STEADY
MAY CHANGE
FROM H TO L
MAY CHANGE
FROM L TO H
,
DON T CARE:
ANY CHANGE
PERMITTED
DOES NOT
APPLY
OUTPUTS
MUST BE
STEADY
WILL BE
CHANGE
FROM H TO L
WILL BE
CHANGE
FROM L TO H
CHANGE :
STATE
UNKNOWN
CENTER
LINE IS HIGH
IMPEDANCE
”OFF ”STATE
„ AC ELECTRICAL CHARACTERISTICS ( TA = -40^oC to + 85^oC)
READ CYCLE
JEDEC
PARAMETER
NAME
t
AVAX
t
AVQV
t
E1LQV
t
E2HOV
t
GLQV
t
E1LQX
t
E2HOX
t
GLQX
t
E1HQZ
t
E2HQZ
t
GHQZ
t
AXOX
PARAMETER
NAME
t
RC
t
AA
t
ACS1
t
ACS2
t
OE
t
CLZ1
t
CLZ2
t
OLZ
t
CHZ1
t
CHZ2
t
OHZ
t
OH
DESCRIPTION
Read Cycle Time
Address Access Time
Chip Select Access Time
Chip Select Access Time
Output Enable to Output Valid
Chip Select to Output Low Z
Chip Select to Output Low Z
Output Enable to Output in Low Z
Chip Deselect to Output in High Z
Chip Deselect to Output in High Z
Output Disable to Output in High Z
Data Hold from Address Change
(CE1)
(CE2)
(CE1)
(CE2)
(CE1)
(CE2)
CYCLE TIME : 55ns
(Vcc = 3.0~5.5V)
MIN. TYP. MAX.
55 --
--
--
-- 55
--
-- 55
--
--
55
--
--
30
10 --
--
10 --
--
5
--
--
-- -- 30
-- -- 30
-- -- 25
10 --
--
CYCLE TIME : 70ns
(Vcc = 2.7~5.5V)
MIN. TYP. MAX.
70 --
--
--
-- 70
--
-- 70
--
--
70
--
-- 35
10 --
--
10 --
--
5
--
--
--
--
35
--
--
35
--
--
30
10 --
--
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
STC62WV2568
4
Revision 1.1
Jan. 2004