Tandy 1400LT Service Manual 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 t W
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
-+
D F DELAY TIME t LD
-
t r(CP)
f(cp)
CR RISE & FALL TIME
t r(DF)
f(DF)
D F 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