X20C16
Software Command Timing Limits
X20C16-35
X20C16-45
X20C16-55
Symbol
Parameter
Min.
Max. Min.
Max.
Min.
Max.
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
Store cycle time
5
5
5
STO
(6)
t
Store pulse width
30
35
35
0
40
45
45
0
50
55
55
0
SP
t
Store pulse hold time
Write cycle time
SPH
t
WC
t
Address setup time
Address hold time
AS
AH
DS
DH
t
t
0
0
0
Data setup time
15
3
20
3
25
3
t
Data hold time
(7)
t
OE disable to store function
Output enable from end of store
Nonvolatile enable to output in high Z
NE setup time
20
10
20
10
20
5
20
10
SOE
(7)
t
OEST
(7)
t
15
25
NHZ
t
5
5
5
5
NES
t
NE hold time
5
NEH
Notes: (6) The Store Pulse Width (t ) is a minimum time that NE, WE and CE must be LOW simultaneously.
SP
(7) t
, t
and t
are periodically sampled and not 100ꢀ tested.
SOE OEST
NHZ
CE Controlled Software Command Sequence
t
t
STO
WC
Address
OE
555
2AA
555
t
t
t
OEST
t
AS
SPH
SP
CE
t
AH
WE
t
t
NEH
NES
NE
t
t
SOE
NHZ
Data Out
Data In
t
t
DH
DS
AA
55
CMD
Characteristics subject to change without notice. 11 of 21
REV 1.0 6/21/00
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XICOR [ XICOR INC. ]
