Datasheet

144
AT89C51ID2
4289C–8051–11/05
Table 99. AC Parameters for a Fix Clock
Table 100. AC Parameters for a Variable Clock
Symbol -M -L Units
Min Max Min Max
T25 25 ns
T
LHLL
35 35 ns
T
AVLL
55ns
T
LLAX
55ns
T
LLIV
n 65 65 ns
T
LLPL
55ns
T
PLPH
50 50 ns
T
PLIV
30 30 ns
T
PXIX
00ns
T
PXIZ
10 10 ns
T
AVIV
80 80 ns
T
PLAZ
10 10 ns
Symbol Type
Standard
Clock X2 Clock
X parameter for
-M range
X parameter for
-L range Units
T
LHLL
Min 2 T - x T - x 15 15 ns
T
AVLL
Min T - x 0.5 T - x 20 20 ns
T
LLAX
Min T - x 0.5 T - x 20 20 ns
T
LLIV
Max 4 T - x 2 T - x 35 35 ns
T
LLPL
Min T - x 0.5 T - x 15 15 ns
T
PLPH
Min 3 T - x 1.5 T - x 25 25 ns
T
PLIV
Max 3 T - x 1.5 T - x 45 45 ns
T
PXIX
Min x x 0 0 ns
T
PXIZ
Max T - x 0.5 T - x 15 15 ns
T
AVIV
Max 5 T - x 2.5 T - x 45 45 ns
T
PLAZ
Max x x 10 10 ns