STK10C68
SRAM WRITE CYCLES #1 & #2
(V = 5.0V 10%)
CC
SYMBOLS
STK10C68-25
STK10C68-35
STK10C68-45
STK10C68-55
NO.
PARAMETER
UNITS
#1
#2
Alt.
MIN
25
20
20
10
0
MAX
MIN
35
25
25
12
0
MAX
MIN
45
30
30
15
0
MAX
MIN
55
45
45
30
0
MAX
12
13
14
15
16
17
18
19
20
21
t
t
t
t
t
t
Write Cycle Time
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
AVAV
AVAV
WC
WP
CW
DW
t
t
Write Pulse Width
WLWH
WLEH
t
t
Chip Enable to End of Write
Data Set-up to End of Write
Data Hold after End of Write
Address Set-up to End of Write
Address Set-up to Start of Write
Address Hold after End of Write
Write Enable to Output Disable
Output Active after End of Write
ELWH
DVWH
WHDX
ELEH
DVEH
EHDX
t
t
t
t
t
DH
t
t
t
20
0
25
0
30
0
45
0
AVWH
AVEH
AW
t
t
t
AS
AVWL
AVEL
t
t
t
0
0
0
0
WHAX
EHAX
WR
h, i
t
t
10
13
14
15
WLQZ
WZ
t
t
5
5
5
5
WHQX
OW
Note i: If W is low when E goes low, the outputs remain in the high-impedance state.
Note j: E or W must be ≥ VIH during address transitions. NE ≥ VIH
.
j
SRAM WRITE CYCLE #1: W Controlled
12
AVAV
t
ADDRESS
19
WHAX
14
ELWH
t
t
E
17
AVWH
t
18
AVWL
t
13
WLWH
W
t
16
WHDX
15
DVWH
t
t
DATA IN
DATA VALID
20
WLQZ
t
21
WHQX
t
HIGH IMPEDANCE
DATA OUT
PREVIOUS DATA
j
SRAM WRITE CYCLE #2: E Controlled
12
AVAV
t
ADDRESS
18
AVEL
19
t
EHAX
14
ELEH
t
t
E
17
AVEH
t
13
WLEH
t
W
16
EHDX
15
DVEH
t
t
DATA IN
DATA VALID
HIGH IMPEDANCE
DATA OUT
March 2006
4
Document Control # ML0006 rev 0.2
SIMTEK [ SIMTEK CORPORATION ]
