STK14EC16-BF15 SIMTEK [Simtek Corporation], STK14EC16-BF15 Datasheet - Page 7

• Manufacturer Part Number: STK14EC16-BF15
• Description: 256Kx16 AutoStore nvSRAM
• Manufacturer: SIMTEK [Simtek Corporation]

Document Control #ML0061 Rev 1.1
Preliminary
SRAM WRITE CYCLES #1, #2, and #3
Note g: If W is low when E goes low, the outputs remain in the high-impedance state.
Note h: E or W must be ≥ V
SRAM WRITE CYCLE #1: W Controlled
SRAM WRITE CYCLE #2: E Controlled
NO.
15
16
17
18
19
20
21
22
23
24
25
Jan, 2008
t
WLQZ
t
t
t
t
t
t
t
t
t
t
WLWH
WHQX
DVWH
WHDX
AVWH
WHAX
ELWH
BLWH
AVWL
AVAV
#1
e, g
Data Output
Data Output
Data Input
Data Input
Address
LB , UB
LB, UB
Address
t
t
t
t
t
t
t
t
t
WLEH
ELEH
BLEH
DVEH
EHDX
AVEH
EHAX
SYMBOLS
AVAV
AVEL
#2
W
W
E
E
IH
during address transitions.
t
t
t
t
t
t
t
t
t
WLBH
DVBH
BHDX
ELBH
BLBH
AVBH
BHAX
AVAV
AVBL
#3
Previous Data
t
Alt.
t
t
t
t
t
t
t
t
t
t
AVWL
WC
CW
DW
WR
OW
t
WP
AW
WZ
DH
AS
(22)
AVWL
(22)
Write Cycle Time
Write Pulse Width
Chip Enable to End of Write
Byte 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
AVWH
Simtek Confidential
(24)
t
t
t
t
ELEH
ELWH
BLWH
WLWH
t
t
BLEH
Address Valid
WLEH
PARAMETER
t
(21)
DVWH
Address Valid
High Impedance
t
t
AVAV
AVAV
(17)
(17)
(18)
t
(16)
(18)
DVEH
Input Data Valid
(16)
g,h
High Impedance
g,h
(19)
7
(15)
(15)
(19)
Input Data Valid
t
t
WHQX
WHDX
t
t
EHAX
WHAX
t
EHDX
(20)
(25)
(23)
STK14EC16-15
(23)
MIN
15
10
15
15
10
(20)
5
0
0
0
3
MAX
7
STK14EC16-25
MIN
25
20
20
20
10
20
0
0
0
3
MAX
10
STK14EC16
STK14EC16-45
MIN
45
30
30
30
15
30
0
0
0
3
MAX
15
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns