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74HC4520 Datasheet(PDF) 6 Page - NXP Semiconductors

Part No. 74HC4520
Description  Dual 4-bit synchronous binary counter
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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74HC4520 Datasheet(HTML) 6 Page - NXP Semiconductors

   
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December 1990
6
Philips Semiconductors
Product specification
Dual 4-bit synchronous binary counter
74HC/HCT4520
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.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr =tf = 6 ns; CL = 50 pF
INPUT
UNIT LOAD COEFFICIENT
nCP0, nCP1
nMR
0.80
1.50
SYMBOL
PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT
VCC
(V)
WAVEFORMS
+25
−40 to +85
−40 to +125
min.
typ.
max. min.
max.
min.
max.
tPHL/ tPLH
propagation delay
nCP0 to nQn
28
53
66
80
ns
4.5
Fig.8
tPHL/ tPLH
propagation delay
nCP1 to nQn
25
53
66
80
ns
4.5
Fig.8
tPHL
propagation delay
nMR to nQn
16
35
44
53
ns
4.5
Fig.9
tTHL/ tTLH
output transition time
7
15
19
22
ns
4.5
Fig.8
tW
clock pulse width
HIGH or LOW
20
10
25
30
ns
4.5
Fig.7
tW
master reset pulse width
HIGH
20
12
25
30
ns
4.5
Fig.7
trem
removal time
nMR to nCP0; nCP1
0
−8
0
0
ns
4.5
Fig.7
tsu
set-up time
nCP1 to nCP0;
nCP0 to nCP1
16
6
20
24
ns
4.5
Fig.8
fmax
maximum clock pulse
frequency
30
58
24
20
MHz
4.5
Fig.7


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