74LVC245AD 查看數據表（PDF） - NXP Semiconductors.
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74LVC245AD Datasheet PDF : 18 Pages
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Nexperia
74LVC245A; 74LVCH245A
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
40 C to +85 C
Min Typ[2] Max
tpd
propagation nAn to nBn; nBn to nAn; see Figure 5 [1]
delay
VCC = 1.2 V
-
17.0
-
VCC = 1.65 V to 1.95 V
1.5 6.5 14.6
VCC = 2.3 V to 2.7 V
1.0 3.4 7.6
VCC = 2.7 V
1.5 3.4 7.3
VCC = 3.0 V to 3.6 V
ten
enable time nOE to nAn, nBn; see Figure 6
1.5 2.9 6.3
[1]
VCC = 1.2 V
-
22.0
-
VCC = 1.65 V to 1.95 V
1.9 8.3 19.5
VCC = 2.3 V to 2.7 V
1.5 4.6 10.7
VCC = 2.7 V
1.5 4.8 9.5
VCC = 3.0 V to 3.6 V
tdis
disable time nOE to nAn, nBn; see Figure 6
1.5 3.7 8.5
[1]
VCC = 1.2 V
-
12.0
-
VCC = 1.65 V to 1.95 V
2.9 5.5 12.3
VCC = 2.3 V to 2.7 V
1.0 3.1 7.1
VCC = 2.7 V
1.5 3.9 8.0
tsk(o)
output skew
time
VCC = 3.0 V to 3.6 V
1.7 3.6 7.0
[3]
-
-
1.0
CPD
power
per input; VI = GND to VCC
dissipation
capacitance
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
[4]
-
7.7
-
-
11.3
-
VCC = 3.0 V to 3.6 V
-
14.4
-
40 C to +125 C Unit
Min
Max
-
- ns
1.5
16.9 ns
1.0
8.7 ns
1.5
9.5 ns
1.5
8.0 ns
-
- ns
1.9
22.5 ns
1.5
12.4 ns
1.5
12.0 ns
1.5
11.0 ns
-
- ns
2.9
14.2 ns
1.0
8.2 ns
1.5
10.0 ns
1.7
9.0 ns
-
1.5 ns
-
- pF
-
- pF
-
- pF
[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] 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.
[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
(CL VCC2 fo) = sum of the outputs.
74LVC_LVCH245A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 28 June 2013
© Nexperia B.V. 2017. All rights reserved
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