STC62WV2568 STC, STC62WV2568 Datasheet - Page 4

• Manufacturer Part Number: STC62WV2568
• Description: Very Low Power/Voltage CMOS SRAM 256K X 8 bit
• Manufacturer: STC

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STC62WV2568
PARAMETER
AC TEST CONDITIONS
READ CYCLE
(Test Load and Input/Output Reference)
AC ELECTRICAL CHARACTERISTICS
JEDEC
Input Pulse Levels
Input Rise and Fall Times
Input and Output
Timing Reference Level
Output Load
NAME
t
t
t
t
t
t
t
t
t
t
t
t
AVAX
AVQV
E1LQV
E2HOV
GLQV
E1LQX
E2HOX
GLQX
E1HQZ
E2HQZ
GHQZ
AXOX
STC
PARAMETER
NAME
t
t
t
t
t
t
t
t
t
t
t
t
RC
AA
ACS1
ACS2
OE
CLZ1
CLZ2
OLZ
CHZ1
CHZ2
OHZ
OH
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
Vcc / 0V
1V/ns
0.5Vcc
C
C
L
L
= 100pF+1TTL
= 30pF+1TTL
DESCRIPTION
DataSheet4U.com
( TA = -40
4
o
C to + 85
(CE1)
(CE2)
(CE1)
(CE2)
(CE1)
(CE2)
WAVEFORM
o
KEY TO SWITCHING WAVEFORMS
C)
CYCLE TIME : 55ns
55
10
10
10
--
--
--
--
MIN. TYP. MAX.
5
--
--
--
(Vcc = 3.0~5.5V)
--
--
--
--
--
--
--
--
--
--
--
--
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
55
55
55
30
30
30
25
--
--
--
--
--
STC62WV2568
,
CYCLE TIME : 70ns
70
10
10
10
--
--
--
--
MIN. TYP. MAX.
5
--
--
--
(Vcc = 2.7~5.5V)
--
--
--
--
--
--
--
--
--
--
--
--
Revision 1.1
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
70
70
70
35
35
35
30
--
--
--
--
--
Jan.
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2004