74ALVC245 查看數據表（PDF） - NXP Semiconductors.
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74ALVC245 Datasheet PDF : 14 Pages
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NXP Semiconductors
74ALVC245
Octal bus transceiver; 3-state
10. Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7.
Symbol Parameter
Conditions
tpd
propagation delay An to Bn; Bn to An; see Figure 5
[2]
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
ten
enable time
OE to An; OE to Bn; see Figure 6
[2]
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
tdis
disable time
OE to An; OE to Bn; see Figure 6
[2]
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
CPD
power dissipation per buffer; VI = GND to VCC; VCC = 3.3 V [3]
capacitance
outputs enabled
outputs disabled
−40 °C to +85 °C
Min
Typ[1]
Max
1.0
2.7
6.0
1.0
2.1
3.5
1.0
3.0
3.6
1.0
2.3
3.4
1.0
4.0
8.6
1.0
3.0
6.0
1.0
2.6
6.3
1.0
2.9
5.5
1.0
4.4
8.0
1.0
2.3
4.8
1.0
3.3
5.3
1.0
3.2
5.5
-
25
-
-
1
-
[1] All typical values are measured at Tamb = 25 °C and VCC = 1.8 V, 2.5 V, 2.7 V and 3.3 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 V;
N = number of inputs switching;
Σ(CL × VCC2 × fo) = sum of the outputs.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
74ALVC245_2
Product data sheet
Rev. 02 — 7 January 2008
© NXP B.V. 2008. All rights reserved.
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