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HEF4518BF 데이터 시트보기 (PDF) - Philips Electronics
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HEF4518BF
Dual BCD counter
Philips Electronics
HEF4518BF Datasheet PDF : 7 Pages
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7
Philips Semiconductors
Dual BCD counter
Product specification
HEF4518B
MSI
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
= 25
°
C; C
L
= 50 pF; input transition times
≤
20 ns
V
DD
V
SYMBOL MIN. TYP. MAX.
Propagation delays
CP
0
, CP
1
→
O
n
HIGH to LOW
LOW to HIGH
MR
→
O
n
HIGH to LOW
Output transition
times
HIGH to LOW
LOW to HIGH
Minimum CP
0
pulse width; LOW
Minimum CP
1
pulse width; HIGH
Minimum MR
pulse width; HIGH
Recovery time
for MR
Set-up times
CP
0
→
CP
1
CP
1
→
CP
0
Maximum clock
pulse frequency
5
10 t
PHL
15
5
10 t
PLH
15
5
10 t
PHL
15
5
10 t
THL
15
5
10 t
TLH
15
5
10 t
WCPL
15
5
10 t
WCPH
15
5
10 t
WMRH
15
5
10 t
RMR
15
5
10 t
su
15
5
10 t
su
15
5
10 f
max
15
120 240 ns
55 110 ns
40 80 ns
120 240 ns
55 110 ns
40 80 ns
75 150 ns
35 70 ns
25 50 ns
60 120 ns
30 60 ns
20 40 ns
60 120 ns
30 60 ns
20 40 ns
60
30
ns
30
15
ns
20
10
ns
60
30
ns
30
15
ns
20
10
ns
30
15
ns
20
10
ns
16
8
ns
50
25
ns
30
15
ns
20
10
ns
50
25
ns
30
15
ns
20
10
ns
50
25
ns
30
15
ns
20
10
ns
8
16
MHz
15
30
MHz
20
40
MHz
TYPICAL EXTRAPOLATION
FORMULA
93 ns
+
(0,55 ns/pF) C
L
44 ns
+
(0,23 ns/pF) C
L
32 ns
+
(0,16 ns/pF) C
L
93 ns
+
(0,55 ns/pF) C
L
44 ns
+
(0,23 ns/pF) C
L
32 ns
+
(0,16 ns/pF) C
L
48 ns
+
(0,55 ns/pF) C
L
24 ns
+
(0,23 ns/pF) C
L
17 ns
+
(0,16 ns/pF) C
L
10 ns
+
(1,0 ns/pF) C
L
9 ns
+
(0,42 ns/pF) C
L
6 ns
+
(0,28 ns/pF) C
L
10 ns
+
(1,0 ns/pF) C
L
9 ns
+
(0,42 ns/pF) C
L
6 ns
+
(0,28 ns/pF) C
L
see also waveforms
Figs 4 and 5
January 1995
4
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