74HC4518 Datasheet, PDF (5/7 Pages) NXP Semiconductors – Dual synchronous BCD counter

Philips Semiconductors
Dual synchronous BCD counter
Product specification
74HC/HCT4518
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL
PARAMETER
74HC
+25
−40 to +85
−40 to +125
UNIT
V_CC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
t_PHL/ t_PLH propagation delay
nCP₀, nCP₁ to nQ_n
t_PHL
propagation delay
nMR to nQ_n
66 210
265
24 42
53
19 36
45
44 150
190
16 30
38
13 26
33
315 ns
63
59
225 ns
45
38
2.0 Fig.9
4.5
6.0
2.0 Fig.8
4.5
6.0
t_THL/ t_TLH output transition time
19 75
95
7 15
19
6 13
16
110 ns
22
19
2.0 Fig.9
4.5
6.0
t_W
clock pulse width
80 25
HIGH or LOW
16 9
14 7
100
120
20
24
17
20
t_W
master reset pulse width 120 39
HIGH
24 14
20 11
150
180
30
36
26
31
t_rem
removal time
0 −22
0
0
nMR to nCP₀, nCP₁ 0 −8
0
0
0 −6
0
0
t_su
set-up time
nCP₁ to nCP₀;
nCP₀ to nCP₁
80 22
16 8
14 6
100
120
20
24
17
20
f_max
maximum clock pulse 6.0 18
4.8
4.0
frequency
30 55
24
20
nCP₀, nCP₁
35 66
28
24
ns 2.0
4.5
6.0
ns 2.0
4.5
6.0
ns 2.0
4.5
6.0
ns 2.0
4.5
6.0
MHz 2.0
4.5
6.0
Fig.8
Fig.8
Fig.8
Fig.7
Fig.8
December 1990
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