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74HC594N Datasheet PDF : 26 Pages
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NXP Semiconductors
74HC594; 74HCT594
8-bit shift register with output register
Table 9. Dynamic characteristics type 74HCT594 …continued
GND = 0 V; VCC = 4.5 V; tr = tf = 6 ns; CL = 50 pF; see Figure 15.
Symbol Parameter Conditions
25 °C
Min Typ Max
tW
pulse width SHCP (HIGH or
LOW); see
Figure 9
16
4
-
STCP (HIGH or
LOW); see
Figure 10
16
4
-
SHR and STR
(HIGH or LOW);
see Figure 13
and Figure 14
16
6
-
tsu
set-up time DS to SHCP;
see Figure 11
20
4
-
SHR to STCP;
see Figure 12
20
6
-
SHCP to STCP;
see Figure 10
20
7
-
th
hold time DS to SHCP;
see Figure 11
5
−3
-
trec
recovery
SHR to SHCP
time
and
STR to STCP;
see Figure 13
and Figure 14
10
−5
-
fmax
maximum SHCP or STCP;
frequency see Figure 9 and
Figure 10
30
92
-
VCC = 5.0 V;
CL = 15 pF
-
100
-
CPD
power
VI = GND to VCC [2] -
89
-
dissipation − 1.5 V;
capacitance VCC = 5 V;
fi = 1 MHz
−40 °C to +85 °C
Min
Max
20
-
20
-
20
-
25
-
25
-
25
-
6
-
13
-
24
-
-
-
-
-
[1] tpd is the same as tPHL and tPLH.
[2] CPD is used to determine the dynamic power dissipation (PD in µW):
PD = CPD × VCC2 × fi × N + ∑(CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
∑(CL × VCC2 × fo) = sum of outputs.
−40 °C to +125 °C Unit
Min
Max
24
-
ns
24
-
ns
24
-
ns
30
-
ns
30
-
ns
30
-
ns
7
-
ns
15
-
ns
20
-
MHz
-
-
MHz
-
-
pF
74HC_HCT594_3
Product data sheet
Rev. 03 — 20 December 2006
© NXP B.V. 2006. All rights reserved.
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