Data Sheet

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Nexperia B.V. 2017. All rights reserved
74HC_HCT174 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 4 — 12 May 2016 8 of 17
Nexperia
74HC174; 74HCT174
Hex D-type flip-flop with reset; positive-edge trigger
[1] t
pd
is the same as t
PHL
and t
PLH
.
[2] t
t
is the same as t
THL
and t
TLH
.
[3] C
PD
is used to determine the dynamic power dissipation (P
D
in W).
P
D
= C
PD
 V
CC
2
 f
i
+ (C
L
 V
CC
2
 f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
 (C
L
 V
CC
2
 f
o
) = sum of outputs;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in V.
74HCT174
t
pd
propagation
delay
CP to Qn; see Figure 6
[1]
V
CC
= 4.5 V - 21 35 - 44 - 53 ns
V
CC
= 5.0 V; C
L
=15pF - 18 - - - - - ns
t
PHL
HIGH to LOW
propagation
delay
MR to Qn; see Figure 7
V
CC
= 4.5 V - 20 35 - 44 - 53 ns
V
CC
= 5.0 V; C
L
=15pF - 17 - - - - - ns
t
t
transition time Qn output; see Figure 6
[2]
V
CC
= 4.5 V - 7 15 - 19 - 22 ns
t
W
pulse width CP input; see Figure 6
V
CC
= 4.5 V 16 7 - 20 - 24 - ns
MR
input LOW;
see Figure 7
V
CC
= 4.5 V 20 7 - 25 - 30 - ns
t
rec
recovery time MR to CP; see Figure 7
V
CC
= 4.5 V 12 3 - 15 - 18 - ns
t
su
set-up time Dn to CP; see Figure 6
V
CC
= 4.5 V 16 4 - 20 - 24 - ns
t
h
hold time Dn to CP; see Figure 6
V
CC
= 4.5 V 5 3- 5 - 5 - ns
f
max
maximum
frequency
CP input; see Figure 6
V
CC
= 4.5 V 30 63 - 24 - 20 - MHz
V
CC
= 5.0 V; C
L
=15pF - 69 - - - - - MHz
C
PD
power
dissipation
capacitance
per package;
V
I
=GNDtoV
CC
 1.5 V
[3]
-17- - - - - pF
Table 7. Dynamic characteristics
…continued
GND (ground = 0 V); C
L
= 50 pF unless otherwise specified; for test circuit, see Figure 8
Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit
Min Typ Max Min Max Min Max