74LVC32245AEC 查看數據表（PDF） - NXP Semiconductors.
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74LVC32245AEC Datasheet PDF : 14 Pages
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NXP Semiconductors
74LVC32245A
32-bit bus transceiver with direction pin; 5 V tolerant; 3-state
10. Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 5.
Symbol Parameter Conditions
Tamb = 40 C to +85 C 40 C to +125 C Unit
Min Typ[1] Max
Min
Max
tpd
propagation nAn to nBn; nBn to nAn; see Figure 3 [2]
delay
VCC = 1.2 V
-
13.0
-
-
- ns
VCC = 1.65 V to 1.95 V
1.5
4.8 10.4
1.5
11.7 ns
VCC = 2.3 V to 2.7 V
1.0 2.6 5.4
1.0
6.1 ns
VCC = 2.7 V
1.0 2.6 4.7
1.0
6.0
ns
VCC = 3.0 V to 3.6 V
ten
enable time nOE to nAn, nBn: see Figure 4
1.0 2.2 4.5
1.0
[2]
6.0
ns
VCC = 1.2 V
-
15.0
-
-
- ns
VCC = 1.65 V to 1.95 V
1.5
5.8 12.5
1.5
14.3 ns
VCC = 2.3 V to 2.7 V
1.0 3.3 6.9
1.0
8.0 ns
VCC = 2.7 V
1.5 3.4 6.7
1.5
8.5
ns
VCC = 3.0 V to 3.6 V
tdis
disable time nOE to nAn, nBn; see Figure 4
1.0 2.7 5.5
1.0
[2]
7.0
ns
VCC = 1.2 V
-
11.0
-
-
- ns
VCC = 1.65 V to 1.95 V
1.0 4.4 9.7
1.0
11.2 ns
VCC = 2.3 V to 2.7 V
0.5 2.5 5.5
0.5
6.5 ns
VCC = 2.7 V
1.5 2.5 6.6
1.5
8.5
ns
tsk(o)
output skew
time
VCC = 3.0 V to 3.6 V
VCC = 3.0 V to 3.6 V
1.5 3.1 5.6
1.5
[3]
-
-
1.0
-
7.0
ns
1.5
ns
CPD
power
per buffer; VI = GND to VCC
dissipation
capacitance
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
[4]
-
11.5
-
-
-
15.2
-
-
-
pF
-
pF
VCC = 3.0 V to 3.6 V
-
18.5
-
-
-
pF
[1] Typical values are measured at Tamb = 25 C and VCC = 1.2, 1.8, 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
(CL VCC2 fo) = sum of the outputs.
74LVC32245A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 8 November 2011
© NXP B.V. 2011. All rights reserved.
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