80C186EB/80C188EB, 80L186EB/80L188EB
AC SPECIFICATIONS
(Continued)
Relative Timings
(80C186EB25, 20, 13/80L186EB16, 13, 8)
Symbol
Parameter
Min
Max
Units
Notes
RELATIVE TIMINGS
T
LHLL
ALE Rising to ALE Falling
T
b
15
ns
T
AVLL
Address Valid to ALE Falling
(/2
T
b
10
ns
T
PLLL
Chip Selects Valid to ALE Falling
(/2
T
b
10
ns
1
T
LLAX
Address Hold from ALE Falling
(/2
T
b
10
ns
T
LLWL
ALE Falling to WR Falling
(/2
T
b
15
ns
1
T
LLRL
ALE Falling to RD Falling
(/2
T
b
15
ns
1
T
WHLH
WR Rising to ALE Rising
(/2
T
b
10
ns
1
T
AFRL
Address Float to RD Falling
0
ns
T
RLRH
RD Falling to RD Rising
(2
*
T)
b
5
ns
2
T
WLWH
WR Falling to WR Rising
(2
*
T)
b
5
ns
2
T
RHAV
RD Rising to Address Active
T
b
15
ns
T
WHDX
Output Data Hold after WR Rising
T
b
15
ns
T
WHPH
WR Rising to Chip Select Rising
(/2
T
b
10
ns
1
T
RHPH
RD Rising to Chip Select Rising
(/2
T
b
10
ns
1
T
PHPL
CS Inactive to CS Active
(/2
T
b
10
ns
1
T
OVRH
ONCE Active to RESIN Rising
T
ns
3
T
RHOX
ONCE Hold from RESIN Rising
T
ns
3
NOTES:
1. Assumes equal loading on both pins.
2. Can be extended using wait states.
3. Not tested
36