AM28F256A-70PCB View Datasheet(PDF) - Advanced Micro Devices
Part Name
Description
MFG CO.
AM28F256A-70PCB
Advanced Micro Devices
'AM28F256A-70PCB' PDF : 35 Pages View PDF
SWITCHING TEST WAVEFORMS
2.4 V
0.45 V
2.0 V
2.0 V
Test Points
0.8 V
0.8 V
Input
Output
3V
1.5 V
0V
Input
Test Points
1.5 V
Output
AC Testing (all speed options except -70): Inputs are driven at
2.4 V for a logic “1” and 0.45 V for a logic “0”. Input pulse rise
and fall times are ≤10 ns.
AC Testing for -70 devices: Inputs are driven at 3.0 V for a
logic “1” and 0 V for a logic “0”. Input pulse rise and fall times
are ≤10 ns.
18879C-17
SWITCHING CHARACTERISTICS over operating range unless otherwise specified
AC Characteristics—Read Only Operation
Parameter Symbols
Am28F256A Speed Options
JEDEC
tAVAV
tELQV
tAVQV
tGLQV
tELQX
tEHQZ
tGLQX
tGHQZ
Standard
Parameter Description
-70 -90 -120 -150 -200 Unit
tRC
tCE
tACC
tOE
tLZ
Read Cycle Time (Note 2)
Chip Enable Access Time
Address Access Time
Output Enable Access Time
Chip Enable to Output in Low Z
(Note 2)
Min
70
90 120 150 200 ns
Max
70
90 120 150 200 ns
Max
70
90 120 150 200 ns
Max
35
35
50
55
55
ns
Min
0
0
0
0
0
ns
tDF
Chip Disable to Output in High Z
(Note 1)
Max
20
20
30
35
35
ns
tOLZ
Output Enable to Output in Low Z
(Note 2)
Min
0
0
0
0
0
ns
tDF
Output Disable to Output in High Z
(Note 2)
Max 20
20
30
35
35
ns
tAXQX
tOH
Output Hold from first of Address,
CE#, or OE# Change (Note 2)
Min
0
0
0
0
0
ns
tVCS
VCC Setup Time to Valid Read
(Note 2)
Min
50
50
50
50
50
µs
Notes:
1. Guaranteed by design not tested.
2. Not 100% tested.
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Am28F256A
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