Tandy 1400LT - Page 210

5-4. Switching Characteristics
VDD
= 5V f lo%, Cload = 15 pF
Item Symbol Condition MIN.
TYP. MAX. Unit
CP frequency
f CP
CP LOAD palse width tW
t DSU
t LSU
t LC, t CL
t DHD
t LF
t FL
DATA SET UP TIME
UDo- UD3 (LDo
- LD3) -+ CP
LOAD SET UP TIME
LOAD
-+ CP TIME
DATA HOLD TIME CP
-+
UDo-UD3 (LDo- LD3)
LOAD
-+ FRAME TIME
FRAME
-+ LOAD TIME
DUTY
= 50%
-
FRAME SET UP TIME
FRAME
-+ LOAD
SETUP (FR)
-
FRAME HOLD TIME
t hold (FR)
-
LOAD + FRAME
LOAD
-+ DF DELAY TIME t LD -
t r(CP)
f(cp)
CR RISE
& FALL TIME
t r(DF)
f(DF)
DF RISE
& FALL TIME
-
125
100
125
63
100
2
2
100
100
3 MHz
-
ns
-
ns
-
ns
ns
ns
-
-
-
ns
300 ns
50 ns
50 ns
100 ns
A-I