X88257S 查看數據表（PDF） - Xicor -> Intersil
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X88257S Datasheet PDF : 15 Pages
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X88257
RD Controlled Read Cycle
Symbol
Parameter
tLHLL
tAVLL
tLLAX
tRLDV
tRHDX
tELLL
PWRL
tRDS
tRDH
tRHDZ (6)
tRLDX (6)
ALE Pulse Width
Address Setup Time
Address Hold Time
RD Read Access Time
Data Hold Time
Chip Enable Setup Time
RD Pulse Width
RD Setup Time
RD Hold Time
RD Disable to Output in High Z
RD to Output in Low Z
RD Controlled Read Timing Diagram
Min.
80
20
30
0
7
150
30
20
0
Max.
120
50
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
6509 PGM T10
CE
ALE
A/D0–A/D7
A8–A14
RD
tLHLL
tELLL
tAVLL
AIN
tLLAX
tRDS
tRDH
tRDH
tRLDX
tRLDV
PWRL
DOUT
tRHDX
ADDRESS
tRHDZ
6509 ILL F06.1
Note: (6) This parameter is periodically sampled and not 100% tested.
SYMBOL TABLE
WAVEFORM INPUTS
OUTPUTS
Must be
steady
May change
from LOW
to HIGH
May change
from HIGH
to LOW
Don’t Care:
Changes
Allowed
N/A
Will be
steady
Will change
from LOW
to HIGH
Will change
from HIGH
to LOW
Changing:
State Not
Known
Center Line
is High
Impedance
8
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