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74AHC125BQ Scheda tecnica(PDF) 7 Page - NXP Semiconductors

Il numero della parte 74AHC125BQ
Spiegazioni elettronici  Quad buffer/line driver; 3-state
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Produttore elettronici  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo NXP - NXP Semiconductors

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74AHC_AHCT125_4
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 11 January 2008
7 of 15
NXP Semiconductors
74AHC125; 74AHCT125
Quad buffer/line driver; 3-state
[1]
Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[2]
tpd is the same as tPLH and tPHL.
ten is the same as tPZL and tPZH.
tdis is the same as tPLZ and tPHZ.
[3]
CPD is used to determine the dynamic power dissipation (PD in µW).
PD =CPD × VCC2 × fi × N+ Σ(CL × VCC2 × fo) where:
fi = input frequency in MHz, fo = output frequency in MHz
CL = output load capacitance in pF
VCC = supply voltage in Volts
N = number of inputs switching
Σ(C
L × VCC
2
× f
o) = sum of the outputs.
11. Waveforms
For type 74AHCT125
tpd
propagation
delay
nA to nY; see Figure 6
[2]
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
3.0
5.5
1.0
6.5
1.0
7.0
ns
CL = 50 pF
-
4.3
7.5
1.0
8.5
1.0
9.5
ns
ten
enable time
nOE to nY; see Figure 7
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
3.4
5.1
1.0
6.0
1.0
6.5
ns
CL = 50 pF
-
4.9
7.3
1.0
8.3
1.0
9.5
ns
tdis
disable time
nOE to nY; see Figure 7
[2]
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
4.5
6.8
1.0
8.0
1.0
8.5
ns
CL = 50 pF
-
6.5
8.8
1.0
10.0
1.0
11.0
ns
CPD
power
dissipation
capacitance
CL = 50 pF; fi = 1 MHz;
VI = GND to VCC
[3]
-12
-
-
-
-
-
pF
Table 7.
Dynamic characteristics …continued
GND = 0 V; For test circuit see Figure 8.
Symbol Parameter
Conditions
25
°C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min
Typ[1] Max
Min
Max
Min
Max
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 6.
Propagation delay input (nA) to output (nY)
mna230
tPHL
tPLH
VM
VM
nA input
nY output
GND
VI
VOH
VOL


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