STK12C68 Simtek, STK12C68 Datasheet - Page 5

• Manufacturer Part Number: STK12C68
• Description: 8Kx8 AutoStore nvSRAM
• Manufacturer: Simtek

Document Control #ML0008 Rev 0.7
SRAM WRITE CYCLES #1 & #2
Note j:
Note k: E or W must be ≥ V
Note l:
SRAM WRITE CYCLE #1: W Controlled
SRAM WRITE CYCLE #2: E Controlled
NO.
12
13
14
15
16
17
18
19
20
21
ADDRESS
DATA OUT
ADDRESS
DATA OUT
DATA IN
February 2007
DATA IN
If W is low when E goes low, the outputs remain in the high-impedance state.
HSB must be high during SRAM WRITE cycles.
t
WLQZ
t
t
t
t
t
t
t
t
t
WLWH
DVWH
WHDX
WHQX
ELWH
AVWH
WHAX
AVWL
AVAV
#1
W
E
W
E
i, j
SYMBOLS
t
t
t
t
t
t
t
t
WLEH
DVEH
EHDX
AVEH
EHAX
AVAV
ELEH
AVEL
#2
IH
t
AVWL
18
during address transitions.
t
AVEL
18
PREVIOUS DATA
t
Alt.
t
t
t
t
t
t
t
t
t
WC
WP
CW
DW
AW
WR
WZ
OW
DH
AS
Write Cycle Time
Write Pulse Width
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
t
WLQZ
t
20
AVEH
PARAMETER
17
t
AVWH
17
t
WLWH
13
t
ELWH
k, l
14
k, l
t
AVAV
12
t
AVAV
12
5
HIGH IMPEDANCE
t
ELEH
14
t
WLEH
13
STK12C68-25
MIN
25
20
20
10
20
0
0
0
5
HIGH IMPEDANCE
t
DVWH
15
t
DVEH
15
MAX
10
DATA VALID
STK12C68 (SMD5962-94599)
DATA VALID
STK12C68-35
MIN
35
25
25
12
25
0
0
0
5
MAX
13
t
WHDX
t
16
WHAX
STK12C68-45
MIN
19
45
30
30
15
30
t
t
0
0
0
5
EHAX
EHDX
19
16
(V
t
WHQX
21
CC
MAX
14
= 5.0V ± 10%)
STK12C68-55
MIN
55
45
45
25
45
0
0
0
5
MAX
15
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
e