STK15C68-PF25 SIMTEK [Simtek Corporation], STK15C68-PF25 Datasheet - Page 4

• Manufacturer Part Number: STK15C68-PF25
• Manufacturer: SIMTEK [Simtek Corporation]

March 2006
STK15C68
SRAM WRITE CYCLES #1 & #2
Note i:
Note j:
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
DATA IN
t
WLQZ
If W is low when E goes low, the outputs remain in the high-impedance state.
E or W must be ≥ V
t
t
t
t
t
t
t
t
t
WLWH
DVWH
WHDX
WHAX
WHQX
ELWH
AVWH
AVWL
AVAV
#1
W
W
E
W
E
h, i
SYMBOLS
t
t
t
t
t
t
t
t
WLEH
DVEH
EHDX
EHAX
ELEH
AVEH
AVEL
AVAV
#2
IH
t
AVWL
t
AVEL
18
during address transitions.
18
t
t
t
t
t
t
Alt.
t
t
t
t
WC
WP
CW
DW
WR
OW
DH
AW
WZ
AS
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
t
WLQZ
20
t
AVEH
1 7
t
AVWH
17
PARAMETER
t
WLWH
13
t
ELWH
j
14
j
t
AVAV
t
AVAV
12
12
HIGH IMPEDANCE
t
4
ELEH
14
t
WLEH
13
HIGH IMPEDANCE
t
DVWH
15
Document Control # ML0009 rev 0.2
t
DVEH
15
DATA VALID
DATA VALID
STK15C68-25
MIN
25
20
20
10
20
0
0
0
5
MAX
10
STK15C68-35
t
MIN
WHDX
t
35
25
25
12
25
WHAX
0
0
0
5
16
19
t
EHDX
t
EHAX
16
19
(V
t
MAX
WHQX
13
21
CC
STK15C68-45
= 5.0V
MIN
45
30
30
15
30
0
0
0
5
MAX
15
±
10%)
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns