74HC393 Просмотр технического описания (PDF) - Philips Electronics
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74HC393 Datasheet PDF : 7 Pages
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Philips Semiconductors
Dual 4-bit binary ripple counter
Product specification
74HC/HCT393
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
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
1CP
2CP
1MR
2MR
UNIT LOAD COEFFICIENT
0.4
0.4
1.0
1.0
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
SYMBOL PARAMETER
tPHL/ tPLH
tPHL/ tPLH
tPHL
tTHL/ tTLH
propagation delay
nCP to nQ0
propagation delay
nQn to nQn+1
propagation delay
nMR to nQn
output transition time
Tamb (°C)
TEST CONDITIONS
74HCT
+25
−40 to +85
−40 to +125
UNIT VCC WAVEFORMS
(V)
min. typ. max. min. max. min. max.
15 25
31
38
ns 4.5 Fig.7
6 10
13
15
ns 4.5 Fig.7
18 32
40
48
ns 4.5 Fig.8
7 15
19
22
ns 4.5 Fig.7
tW
clock pulse width
HIGH or LOW
19 11
tW
master reset pulse
width; HIGH
16 6
trem
removal time
nMR to nCP
50
fmax
maximum clock pulse
27 48
frequency
24
29
20
24
5
5
22
18
ns 4.5 Fig.7
ns 4.5 Fig.8
ns 4.5 Fig.8
MHz 4.5 Fig.7
December 1990
6
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