STK12C68-C20 ETC [List of Unclassifed Manufacturers], STK12C68-C20 Datasheet - Page 4

• Manufacturer Part Number: STK12C68-C20
• Description: 8k x 8 AUTOSTORE NVSRAM QUANTUM TRAP CMOS NONVOLATILE STATIC RAM
• Manufacturer: ETC [List of Unclassifed Manufacturers]

STK12C68
July 1999
SRAM WRITE CYCLES #1 & #2
Note k: If W is low when E goes low, the outputs remain in the high-impedance state.
Note l:
Note m: HSB must be high during SRAM WRITE cycles.
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
E or W must be
WLQZ
t
t
t
t
t
t
t
t
t
WLWH
DVWH
WHDX
AVWH
WHAX
WHQX
ELWH
AVWL
AVAV
#1
W
E
W
E
j, k
SYMBOLS
t
t
t
t
t
t
t
t
WLEH
DVEH
EHDX
EHAX
ELEH
AVEH
AVEL
AVAV
#2
V
IH
t
AVWL
18
during address transitions.
t
AVEL
18
PREVIOUS DATA
Alt.
t
t
t
t
t
t
t
t
t
t
OW
WC
WP
CW
DW
AW
WR
WZ
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
l, m
14
l, m
t
AVAV
12
t
AVAV
4-44
12
HIGH IMPEDANCE
t
ELEH
14
t
WLEH
13
STK12C68-20
MIN
20
15
15
15
8
0
0
0
5
HIGH IMPEDANCE
t
DVWH
15
t
DVEH
15
MAX
DATA VALID
7
DATA VALID
STK12C68-25
MIN
25
20
20
10
20
0
0
0
5
MAX
10
t
WHDX
t
16
WHAX
STK12C68-35
19
MIN
35
25
25
12
25
(V
t
t
0
0
0
5
EHAX
EHDX
19
16
CC
t
WHQX
21
MAX
13
= 5.0V
STK12C68-45
MIN
45
30
30
15
30
0
0
0
5
MAX
15
10%)
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
b, f