hef4518b NXP Semiconductors, hef4518b Datasheet - Page 4

• Manufacturer Part Number: hef4518b
• Description: Dual Bcd Counter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
AC CHARACTERISTICS
V
January 1995
Propagation delays
Output transition
Minimum CP
Minimum CP
Minimum MR
Recovery time
Set-up times
Maximum clock
SS
Dual BCD counter
CP
MR
times
pulse width; LOW
pulse width; HIGH
pulse width; HIGH
for MR
CP
CP
pulse frequency
= 0 V; T
HIGH to LOW
LOW to HIGH
HIGH to LOW
HIGH to LOW
LOW to HIGH
0
0
1
, CP
O
CP
CP
n
amb
1
0
1
1
0
= 25 C; C
O
n
L
= 50 pF; input transition times
V
V
DD
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
5
5
5
5
5
5
5
5
5
5
5
5
t
t
t
t
t
t
t
t
t
t
t
f
PHL
PLH
PHL
THL
TLH
WCPL
WCPH
WMRH
RMR
su
su
max
SYMBOL
60
30
20
60
30
20
30
20
16
50
30
20
50
30
20
50
30
20
8
15
20
MIN. TYP. MAX.
4
20 ns
120
120
55
40
55
40
75
35
25
60
30
20
60
30
20
30
15
10
30
15
10
15
10
25
15
10
25
15
10
25
15
10
16
30
40
8
240 ns
240 ns
150 ns
120 ns
120 ns
110 ns
110 ns
80 ns
80 ns
70 ns
50 ns
60 ns
40 ns
60 ns
40 ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
MHz
MHz
93 ns
44 ns
32 ns
93 ns
44 ns
32 ns
48 ns
24 ns
17 ns
10 ns
10 ns
9 ns
6 ns
9 ns
6 ns
TYPICAL EXTRAPOLATION
see also waveforms
Figs 4 and 5
FORMULA
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(1,0 ns/pF) C
(0,42 ns/pF) C
(0,28 ns/pF) C
(1,0 ns/pF) C
(0,42 ns/pF) C
(0,28 ns/pF) C
Product specification
HEF4518B
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
MSI