ISSUE 4.2:November1998
MFM8126S-70/90/12
AC Operating Conditions
Read
-70
-90
-12
Parameter
Symbol
min
max
min
max
min
max
unit
ReadCycleTime
tRC
tAC
tCE
tOE
tDF
tDF
tOH
70
-
-
90
-
-
120
-
ns
ns
ns
ns
ns
ns
ns
Address to output delay
Chip Select to output
70
70
30
20
20
-
90
90
35
20
20
-
-
-
120
120
50
30
30
-
-
-
Output Enable to output
Chip Select to O/P High Z
Output Enable to output High Z
Output hold time (From address,
CS or OE whichever occurs first)
-
-
-
-
-
-
-
-
-
0
0
0
Write/ Erase/ Program
-70
-90
-12
Parameter
Symbol
min
max
min
max
min
max
unit
Write Cycle time
tWC
tAS
70
0
-
-
90
0
-
-
120
0
-
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
s
Address Setup time
Address Hold time
tAH
45
30
0
-
45
40
0
-
50
50
0
-
DataSetupTime
tDS
-
-
-
DataholdTime
tDH
-
-
-
Output Enable Setup Time
OutputEnableHoldTime
ReadRecoverbeforeWrite
CS setup time
tOES
tOEH
tGHWL
tCS
0
-
0
-
0
-
0
-
0
-
0
-
0
-
0
-
0
-
0
-
0
-
0
-
CS hold time
tCH
0
-
0
-
0
-
Write Pulse Width
tWP
35
20
14
3
-
40
20
14
3
-
50
20
14
3
-
Write Pulse Width High
Programmingoperation
Eraseoperation(1)
tWPH
tWHWH1
tWHWH2
tVCS
tVLHT
tWPP
tOESP
tCSP
-
-
-
-
-
-
60
-
60
-
60
-
Vcc setup time(4)
50
4
50
4
50
4
µs
ns
ns
ns
ns
VoltageTransitionTime(2,4)
Write Pulse Width(2)
OE Setup time to WE active(2,4)
CS Setup time to WE active(3,4)
-
-
-
10
4
-
10
4
-
10
4
-
-
-
-
4
-
4
-
4
-
Notes:
(1) This also includes the preprogramming time.
(2) These timings are for Sector Protect/Unprotect operations.
(3) This timing is only for Sector Unprotect.
(4) Not 100% tested.
4
MOSAIC [ MOSAIC ]
