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74HC258 View Datasheet(PDF) - NXP Semiconductors.

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74HC258 Datasheet PDF : 14 Pages
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NXP Semiconductors
74HC258
Quad 2-input multiplexer; 3-state; inverting
10. Dynamic characteristics
Table 7. Dynamic characteristics
GND = 0 V; for test circuit see Figure 8.
Symbol Parameter
Conditions
Min
tpd
propagation delay nl0, nI1to nY; see Figure 6 [1]
VCC = 2.0 V
-
VCC = 4.5 V
-
VCC = 6.0 V
-
VCC = 5.0 V; CL = 15 pF
-
S to nY; see Figure 6
VCC = 2.0 V
-
VCC = 4.5 V
-
VCC = 6.0 V
-
VCC = 5.0 V; CL = 15 pF
-
ten
enable time
OE to nY; see Figure 7
[2]
VCC = 2.0 V
-
VCC = 4.5 V
-
VCC = 6.0 V
-
tdis
disable time
OE to nY; see Figure 7
[3]
VCC = 2.0 V
-
VCC = 4.5 V
-
VCC = 6.0 V
tt
transition time
see Figure 6
-
[4]
VCC = 2.0 V
-
VCC = 4.5 V
-
VCC = 6.0 V
CPD
power dissipation per multiplexer;
capacitance
VI = GND to VCC
-
[5]
-
[1] tpd is the same as tPHL and tPLH.
[2] ten is the same as tPZH and tPZL.
[3] tdis is the same as tPHZ and tPLZ.
[4] tt is the same as tTHL and tTLH.
[5] 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.
25 °C
Typ
30
11
9
9
47
17
14
14
39
14
11
55
20
16
14
5
4
55
40 °C to +125 °C Unit
Max
Max
Max
(85 °C) (125 °C)
95
120
145 ns
19
24
29 ns
16
20
25 ns
-
-
- ns
140
175
210 ns
28
35
42 ns
24
30
36 ns
-
-
- ns
140
175
210 ns
28
35
42 ns
24
30
36 ns
150
190
225 ns
30
38
45 ns
26
33
38 ns
60
75
90 ns
12
15
18 ns
10
13
15 ns
-
-
- pF
74HC258_4
Product data sheet
Rev. 04 — 14 April 2008
© NXP B.V. 2008. All rights reserved.
6 of 14
 

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