6.0 AC CHARACTERISTICS READ CYCLE (Post-Radiation)*
(V = 5.0V ±10%; -55°C < T < +125°C)
DD
C
SYMBOL
PARAMETER
MINIMUM
MAXIMUM
UNIT
t
Clock Period
50
ns
CLCL
1/t
Oscillator Frequency
20
MHz
ns
CLCL
t
t
ALE Pulse Width
2 t
-40
LHLL
CLCL
Address Valid to ALE Low
Address Hold after ALE Low
t
t
-40
ns
AVLL
1
CLCL
-30
ns
CLCL
t
LLAX
t
ALE Low to Valid Instruction
ALE Low to PSEN Low
4 t
3 t
-100
-105
ns
ns
ns
ns
ns
LLIV
LLPL
PLPH
CLCL
t
t
-30
CLCL
t
PSEN Pulse Width
3 t
-45
CLCL
t
PSEN Low to Valid Instruction In
Input Instruction Hold after PSEN
PLIV
CLCL
1
0
t
PXIX
1
Input Instruction Float after PSEN
t
-25
ns
CLCL
t
PXIZ
t
Address to Valid Instruction In
PSEN Low to Address Float
5 t
-105
ns
ns
AVIV
CLCL
1
10
t
PLAZ
t
RD Pulse Width
6 t
6 t
-100
-100
ns
ns
ns
ns
RLRH
CLCL
t
WR Pulse Width
WLWH
CLCL
t
RD Low to Valid Data In
Data Hold After RD High
5 t -165
CLCL
RLDV
1
0
t
RHDX
1
Data Float After RD High
2 t
-60
ns
CLCL
t
RHDZ
t
ALE Low Valid Data In
Address to Valid Data In
ALE Low to RD or WR Low
Address Valid to WR Low
Data Valid Before WR High
Data Hold After WR High
Data Valid to WR High
8 t
9 t
-150
-165
ns
ns
ns
ns
ns
ns
ns
LLDV
CLCL
t
AVDV
CLCL
t
3 t
-50
3 t
+50
LLWL
CLCL
CLCL
t
4 t
-130
CLCL
AVWL
t
t
t
t
-33
-33
QVWX
WHQX
CLCL
CLCL
7 t
-150
CLCL
t
t
QVWH
1
RD Low to Address Float
0
ns
ns
RLAZ
t
RD or WR High to ALE High
t
-40
t
+40
CLCL
WHLH
CLCL
Note:
* Post-radiation performance guaranteed at 25°C per MIL-STD-883 Method 1019 at 1.0E6 rads(Si).
1. Guaranteed, but not tested.
10
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
