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74HCT74DB Fiches technique(PDF) 9 Page - NXP Semiconductors

No de pièce 74HCT74DB
Description  Dual D-type flip-flop with set and reset; positive edge-trigger
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Fabricant  NXP [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo NXP - NXP Semiconductors

74HCT74DB Fiches technique(HTML) 9 Page - NXP Semiconductors

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74HC_HCT74
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 27 August 2012
9 of 21
NXP Semiconductors
74HC74; 74HCT74
Dual D-type flip-flop with set and reset; positive edge-trigger
[1]
All typical values are measured at Tamb =25 C.
[2]
tpd is the same as tPLH and tPHL.
[3]
tt is the same as tTHL and tTLH.
[4]
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.
th
hold time
nD to nCP; see Figure 7
VCC = 4.5 V
3
3-
3
-
ns
fmax
maximum
frequency
nCP; see Figure 7
VCC = 4.5 V
22
54
-
18
-
MHz
VCC =5V; CL =15pF
-
59
-
-
-
MHz
CPD
power
dissipation
capacitance
CL =50pF;f= 1 MHz;
VI =GND to VCC - 1.5 V
[4]
-29
-
-
-
pF
Table 8.
Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 9.
Symbol Parameter
Conditions
Tamb = 40 C to +85 C
Tamb = 40 C to +125 C Unit
Min
Typ[1]
Max
Min
Max


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