HD74LS174 / HD74LS175
Switching Characteristics
•
HD74LS174
(V
CC
= 5 V, Ta = 25°C)
Item
Maximum clock frequency
Propagation delay time
Symbol
ƒ
max
t
PHL
t
PLH
t
PHL
Inputs
Clock
Clear
Clock
Clock
Outputs
Q
Q
Q
Q
min.
30
—
—
—
typ.
40
23
20
21
max.
—
35
30
30
Unit
MHz
ns
Condition
C
L
= 15 pF,
R
L
= 2 kΩ
•
HD74LS175
(V
CC
= 5 V, Ta = 25°C)
Item
Maximum clock frequency
Symbol
ƒ
max
t
PLH
t
PHL
t
PLH
t
PHL
Inputs
Clock
Clear
Clock
Clock
Outputs
Q,
Q
Q
Q
Q,
Q
Q,
Q
min.
30
—
—
—
—
typ.
40
16
20
13
16
max.
—
25
30
25
25
Unit
MHz
Condition
Propagation delay time
ns
C
L
= 15 pF,
R
L
= 2 kΩ
Testing Method
Test Circuit
V
CC
Out
In
P.G.
Z
out
= 50Ω
Q
Load circuit 1
R
L
D
See Testing Table
C
L
In
P.G.
Z
out
= 50Ω
CK
Out
CLR
Q
Same as Load Circuit 1.
Notes:
1. Test is put into the each flip-flop.
2. C
L
includes probe and jig capacitance.
3. All diodes are 1S2074(H).
Testing Table
Item
ƒ
max
t
PLH
t
PHL
From input to output
CK→Q,
Q*
CK→Q,
Q*
CLR
4.5 V
4.5 V
IN
Inputs
CK
IN
IN
IN
Outputs
D
IN
IN
4.5 V
Q
OUT
Q
OUT
CLR→Q,
Q*
Note: *. HD74LS175 only
Rev.3.00, Jul.15.2005, page 5 of 8
RENESAS [ RENESAS TECHNOLOGY CORP ]
