74HC374 데이터 시트보기 (PDF) - Philips Electronics
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74HC374 Datasheet PDF : 8 Pages
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Philips Semiconductors
Octal D-type flip-flop; positive edge-trigger;
3-state
Product specification
74HC/HCT374
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
OE
CP
Dn
UNIT LOAD COEFFICIENT
1.25
0.90
0.35
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
SYMBOL
PARAMETER
74HCT
+25
−40 to +85
−40 to +125
UNIT
VCC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
CP to Qn
16 32
40
48 ns 4.5 Fig.6
tPZH/ tPZL 3-state output enable time
16 30
38
45 ns 4.5 Fig.7
OE to Qn
tPHZ/ tPLZ 3-state output disable time
18 28
35
42 ns 4.5 Fig.7
OE to Qn
tTHL/ tTLH output transition time
5 12
15
18 ns 4.5 Fig.6
tW
clock pulse width
HIGH or LOW
19 11
24
29
tsu
set-up time
Dn to CP
12 7
15
18
th
hold time
Dn to CP
5 −3
5
5
fmax
maximum clock pulse
26 44
21
17
frequency
ns 4.5 Fig.6
ns 4.5 Fig.8
ns 4.5 Fig.8
MHz 4.5 Fig.6
December 1990
6
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