AMD27C256 Datasheet, PDF (12/12 Pages) Advanced Micro Devices – 256 Kilobit (32,768 x 8-Bit) CMOS EPROM

KEY TO SWITCHING TEST WAVEFORMS
WAVEFORM
SWITCHING WAVEFORMS
INPUTS
Must Be
Steady
May
Change
from H to L
May
Change
from L to H
Don’t Care,
Any Change
Permitted
Does Not
Apply
OUTPUTS
Will Be
Steady
Will Be
Changing
from H to L
Will Be
Changing
from L to H
Changing
State
Unknown
Center
Line is High
Impedence
“Off” State
KS000010
2.4
Addresses
0.45
2.0
Addresses Valid
2.0
0.8
0.8
AMD
CE
tCE
OE
Output
High Z
tOE
tACC
(Note 1)
tOH
Valid Output
Notes:
1. OE may be delayed up to tACC–tOE after the falling edge of the addresses without impact on tACC.
2. tDF is specified from OE or CE, whichever occurs first.
tDF
(Note 2)
High Z
08007H-10
Am27C256
2-43