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74HC7540DB Datasheet(PDF) 6 Page - NXP Semiconductors

No. de pieza 74HC7540DB
Descripción Electrónicos  Octal Schmitt trigger buffer/line driver; 3-state; inverting Rev. 4 ??31 December 2012
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Fabricante Electrónico  NXP [NXP Semiconductors]
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74HC7540DB Datasheet(HTML) 6 Page - NXP Semiconductors

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74HC_HCT7540
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 31 December 2012
6 of 16
NXP Semiconductors
74HC7540; 74HCT7540
Octal Schmitt trigger buffer/line driver; 3-state; inverting
[1]
tpd is the same as tPLH and tPHL.
ten is the same as tPZL and tPZH.
tdis is the same as tPLZ and tPHZ.
[2]
tt is the same as tTHL and tTLH.
[3]
CPD is used to determine the dynamic power dissipation (PD in W):
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;
 (C
L  VCC
2
 f
o) = sum of outputs.
tt
transition time
see Figure 5
[2]
VCC = 2.0 V
-
14
60
75
90
ns
VCC = 4.5 V
-
5
12
15
18
ns
VCC = 6.0 V
-
4
10
13
15
ns
CPD
power dissipation
capacitance
per package;
VI =GND to VCC
[3]
-29
-
-
-
pF
74HCT7540
tpd
propagation delay
An to Yn; see Figure 5
[1]
VCC = 4.5 V
-
19
32
40
48
ns
VCC = 5.0 V; CL =15pF
-
16
-
-
-
ns
ten
enable time
OEnto Yn; see Figure 6
[1]
VCC = 4.5 V
-
19
32
40
48
ns
tdis
disable time
OEnto Yn; see Figure 6
[1]
VCC = 4.5 V
-
20
32
40
48
ns
tt
transition time
VCC = 4.5 V; see Figure 5
[2]
-
5
12
15
18
ns
CPD
power dissipation
capacitance
per package;
VI =GND to VCC  1.5 V
[3]
-31
-
-
-
pF
Table 7.
Dynamic characteristics
GND = 0 V; CL = 50 pF; for test circuit see Figure 7.
Symbol Parameter
Conditions
Tamb = 25 C
Tamb = 40 C to +125 C
Unit
Min
Typ
Max
Max (85
C) Max (125 C)


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