stk14ee16 Simtek Corporation, stk14ee16 Datasheet - Page 7

• Manufacturer Part Number: stk14ee16
• Description: 512kx16 Autostore Nvsram
• Manufacturer: Simtek Corporation

Document Control #ML0069 Rev 1.0
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
March, 2008
t
WLQZ
t
t
t
t
t
t
t
t
t
t
WLWH
DVWH
WHDX
WHAX
WHQX
ELWH
BLWH
AVWH
AVWL
AVAV
#1
e, g
Data Output
Data Output
Data Input
Data Input
Address
LB , UB
LB, UB
Address
t
t
t
W
t
t
t
t
t
t
W
WLEH
E
ELEH
BLEH
DVEH
EHDX
AVEH
EHAX
AVAV
AVEL
SYMBOLS
E
#2
IH
during address transitions.
Previous Data
t
t
t
t
t
t
t
t
t
WLBH
DVBH
BHDX
BHAX
ELBH
BLBH
AVBH
AVBL
AVAV
#3
t
AVWL
t
(22)
AVWL
Alt.
t
t
t
t
t
t
t
t
t
t
WC
WP
CW
DW
AW
WR
WZ
OW
DH
AS
(22)
t
WLQZ
t
AVWH
Simtek Confidential
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
(24)
t
t
t
t
ELEH
ELWH
BLWH
WLWH
t
t
BLEH
Address Valid
WLEH
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)
PARAMETER
7
(15)
(15)
(19)
Input Data Valid
t
t
WHQX
WHDX
t
t
EHAX
WHAX
t
EHDX
(20)
(25)
(23)
(23)
(20)
STK14EE16-25
MIN
25
20
20
20
10
20
0
0
0
3
MAX
10
STK14EE16-45
STK14EE16
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