74HC4520DB Datasheet, PDF (6/7 Pages) NXP Semiconductors – Dual 4-bit synchronous binary counter

Philips Semiconductors
Dual 4-bit synchronous binary counter
Product specification
74HC/HCT4520
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I_CC) for a unit load of 1 is given in the family specifications.
To determine ∆I_CC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
nCP₀, nCP₁
nMR
UNIT LOAD COEFFICIENT
0.80
1.50
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL
PARAMETER
74HCT
+25
−40 to +85
−40 to +125
UNIT _VCC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL
t_THL/ t_TLH
propagation delay
nCP₀ to nQ_n
propagation delay
nCP₁ to nQ_n
propagation delay
nMR to nQ_n
output transition time
28 53
66
25 53
66
16 35
44
7 15
19
80 ns 4.5 Fig.8
80 ns 4.5 Fig.8
53 ns 4.5 Fig.9
22 ns 4.5 Fig.8
t_W
clock pulse width
20 10
25
30
HIGH or LOW
t_W
master reset pulse width 20 12
25
30
HIGH
t_rem
removal time
0 −8
0
0
nMR to nCP₀; nCP₁
t_su
set-up time
nCP₁ to nCP₀;
nCP₀ to nCP₁
16 6
20
24
f_max
maximum clock pulse 30 58
24
20
frequency
ns 4.5 Fig.7
ns 4.5 Fig.7
ns 4.5 Fig.7
ns 4.5 Fig.8
MHz 4.5 Fig.7
December 1990
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