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74LVC244ABQ Fiches technique(PDF) 8 Page - NXP Semiconductors

No de pièce 74LVC244ABQ
Description  Octal buffer/line driver; 3-state
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Fabricant  NXP [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo NXP - NXP Semiconductors

74LVC244ABQ Fiches technique(HTML) 8 Page - NXP Semiconductors

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74LVC_LVCH244A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 8 — 26 June 2013
8 of 19
NXP Semiconductors
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
10. Dynamic characteristics
[1]
Typical values are measured at Tamb =25 C and VCC = 1.2 V, 1.8 V, 2.5 V, 2.7 V, and 3.3 V respectively.
[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]
Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
[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 Volts
N = number of inputs switching
(C
L  VCC
2
 f
o) = sum of the outputs.
Table 7.
Dynamic characteristics
Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 8.
Symbol Parameter
Conditions
40 C to +85 C
40 C to +125 C Unit
Min
Typ[1]
Max
Min
Max
tpd
propagation
delay
nAntonYn; see Figure 6
[2]
VCC = 1.2 V
-
17.0
-
-
-
ns
VCC = 1.65 V to 1.95 V
1.5
6.4
13.7
1.5
15.8
ns
VCC = 2.3 V to 2.7 V
1.0
3.4
7.1
1.0
8.2
ns
VCC = 2.7 V
1.5
3.4
6.9
1.5
9.0
ns
VCC = 3.0 V to 3.6 V
1.5
2.9
5.9
1.5
7.5
ns
ten
enable time
nOE to nYn; see Figure 7
[2]
VCC = 1.2 V
-
24.0
-
-
-
ns
VCC = 1.65 V to 1.95 V
1.5
7.0
17.3
1.5
20.0
ns
VCC = 2.3 V to 2.7 V
1.5
3.9
9.5
1.5
11.0
ns
VCC = 2.7 V
1.5
4.1
8.6
1.5
11.0
ns
VCC = 3.0 V to 3.6 V
1.0
3.2
7.6
1.0
9.5
ns
tdis
disable time
nOE to nYn; see Figure 7
[2]
VCC = 1.2 V
-
9.0
-
-
-
ns
VCC = 1.65 V to 1.95 V
2.2
4.5
9.8
2.2
11.3
ns
VCC = 2.3 V to 2.7 V
0.5
3.6
5.5
0.5
6.4
ns
VCC = 2.7 V
1.5
3.3
6.8
1.5
8.5
ns
VCC = 3.0 V to 3.6 V
1.5
3.1
5.8
1.5
7.5
ns
tsk(o)
output skew
time
[3]
--
1.0
-
1.5
ns
CPD
power
dissipation
capacitance
per input; VI =GND to VCC
[4]
VCC = 1.65 V to 1.95 V
-
6.4
-
-
-
pF
VCC = 2.3 V to 2.7 V
-
9.6
-
-
-
pF
VCC = 3.0 V to 3.6 V
-
12.5
-
-
-
pF


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