HEF4731 查看數據表（PDF） - Philips Electronics
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HEF4731 Datasheet PDF : 4 Pages
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Philips Semiconductors
Quadruple 64-bit static shift register
Product specification
HEF4731B; HEF4731V
LSI
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL MIN. TYP. MAX.
Propagation delays
CP → O63
HIGH to LOW
LOW to HIGH
Transition times O63
HIGH to LOW
LOW to HIGH
Minimum clock
pulse width; HIGH
Set-up time
D → CP
Hold time
D → CP
Maximum clock
pulse frequency
5
10 tPHL
15
5
10 tPLH
15
5
10 tTHL
15
5
10 tTLH
15
5
10 tWCPH
15
5
10 tsu
15
5
10 thold
15
5
10 fmax
15
115 230 ns
55 110 ns
40
80 ns
130 260 ns
65 130 ns
45
90 ns
30
60 ns
12
24 ns
10
20 ns
40
80 ns
20
40 ns
15
30 ns
200
80
ns
75
30
ns
50
20
ns
25
−5
ns
15
−5
ns
15
−5
ns
50
20
ns
30
10
ns
20
5
ns
2.25
6
MHz
6
16
MHz
9
25
MHz
TYPICAL EXTRAPOLATION
FORMULA
132 ns + (0,26 ns/pF) CL
47 ns + (0,16 ns/pF) CL
34 ns + (0,11 ns/pF) CL
138 ns + (0,45 ns/pF) CL
56 ns + (0,19 ns/pF) CL
39 ns + (0,13 ns/pF) CL
10 ns + (0,40 ns/pF) CL
3 ns + (0,18 ns/pF) CL
3 ns + (0,13 ns/pF) CL
8 ns + (0,65 ns/pF) CL
5 ns + (0,30 ns/pF) CL
5 ns + (0,20 ns/pF) CL
see also waveforms Fig.4
Note: the maximum
power dissipation has
to be observed
Fig.4
Waveforms showing
minimum clock pulse
width, set-up and hold
times for D to CP.
Set-up and hold times
are shown as positive
values but may be
specified as negative
values.
January 1995
4
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