STK16C88 Simtek, STK16C88 Datasheet - Page 4

• Manufacturer Part Number: STK16C88
• Description: CMOS Nonvolatile Static RAM
• Manufacturer: Simtek

STK16C88
February 2002
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
DATA OUT
ADDRESS
DATA IN
DATA IN
t
WLQZ
t
t
t
t
t
If W is low when E goes low, the outputs remain in the high-impedance state.
E or W must be
t
t
t
t
WLWH
DVWH
WHDX
WHQX
AVWH
WHAX
ELWH
AVWL
AVAV
#1
W
E
W
E
h, i
SYMBOLS
t
t
t
t
t
t
t
t
WLEH
DVEH
EHDX
ELEH
AVEH
EHAX
AVAV
AVEL
#2
V
IH
t
AVWL
18
during address transitions.
t
AVEL
18
t
Alt.
t
t
t
t
t
t
t
t
t
WC
WP
CW
DW
AW
WR
WZ
OW
DH
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
t
20
AVEH
17
t
AVWH
17
PARAMETER
t
WLWH
13
t
j
ELWH
j
14
t
AVAV
12
t
AVAV
5-68
12
HIGH IMPEDANCE
t
ELEH
14
t
WLEH
13
HIGH IMPEDANCE
t
DVWH
15
t
DVEH
15
DATA VALID
DATA VALID
STK16C88-25
MIN
25
20
20
10
20
0
0
0
5
MAX
10
t
WHDX
t
STK16C88-35
WHAX
16
MIN
19
t
35
25
25
12
25
EHDX
0
t
0
0
5
EHAX
16
19
(V
t
WHQX
21
MAX
13
CC
= 5.0V
STK16C88-45
MIN
45
30
30
15
30
0
0
0
5
MAX
15
10%)
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns