STK12C68-M Simtek, STK12C68-M Datasheet - Page 4

• Manufacturer Part Number: STK12C68-M
• Description: CMOS NV SRAM 8K X 8 AUTOSTORE NONVOLATILE STATIC RAM
• Manufacturer: Simtek

STK12C68-M
WRITE CYCLES #1 & #2
Note h: Measured 200mV from steady state output voltage.
Note i:
Note j:
WRITE CYCLE #1: W CONTROLLED
WRITE CYCLE #2: E CONTROLLED
NO.
12
13
14
15
16
17
18
19
20
21
DATA OUT
DATA OUT
ADDRESS
ADDRESS
DATA IN
DATA IN
E or W must be
If W is low when E goes low, the outputs remain in the high impedance state.
t
t
t
t
t
t
t
t
t
t
AVAV
WLWH
ELWH
DVWH
WHDX
AVWH
AVWL
WHAX
WLQZ
WHQX
W
W
#1
E
E
h,j
SYMBOLS
t
t
t
t
t
t
t
t
AVAV
WLEH
ELEH
DVEH
EHDX
AVEH
AVEL
EHAX
#2
V
IH
during address transitions.
t
t
t
t
t
t
t
t
t
t
Alt.
WC
WP
CW
DW
DH
AW
AS
WR
WZ
OW
t
AVWL
18
t
AVEL
18
PREVIOUS DATA
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
PARAMETER
i
i
t
t
WLQZ
AVWH
20
17
t
AVEH
17
HIGH IMPEDANCE
4-56
t
ELWH
t
14
ELEH
14
t
t
AVAV
AVAV
t
12
12
WLEH
13
t
WLWH
13
STK12C68-40M
MIN
35
30
30
18
30
0
0
0
5
t
t
DVEH
HIGH IMPEDANCE
DVWH
15
MAX
15
17
DATA VALID
DATA VALID
STK12C68-45M
MIN
45
35
35
20
35
0
0
0
5
MAX
20
t
WHDX
t
EHDX
16
16
(V
t
WHQX
t
t
EHAX
WHAX
21
STK12C68-55M
19
CC
19
MIN
55
45
45
25
45
0
0
0
5
= 5.0V
MAX
25
10%)
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
d