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74LVC2T45GT 数据表(PDF) 10 Page - NXP Semiconductors

部件名 74LVC2T45GT
功能描述  Dual supply translating transceiver; 3-state
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

74LVC2T45GT 数据表(HTML) 10 Page - NXP Semiconductors

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74LVC_LVCH2T45_3
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 19 January 2010
10 of 32
NXP Semiconductors
74LVC2T45; 74LVCH2T45
Dual supply translating transceiver; 3-state
11. Dynamic characteristics
[1]
tPZH and tPZL are calculated values using the formula shown in Section 14.4 “Enable times”.
[1]
tPZH and tPZL are calculated values using the formula shown in Section 14.4 “Enable times”.
Table 9.
Typical dynamic characteristics at VCC(A) = 1.2 V and Tamb = 25 °C
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9; for waveforms see Figure 7 and Figure 8.
Symbol Parameter
Conditions
VCC(B)
Unit
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
5.0 V
tPLH
LOW to HIGH
propagation delay
A to B
10.6
8.1
7.0
5.8
5.3
5.1
ns
B to A
10.6
9.5
9.0
8.5
8.3
8.2
ns
tPHL
HIGH to LOW
propagation delay
A to B
10.1
7.1
6.0
5.3
5.2
5.4
ns
B to A
10.1
8.6
8.1
7.8
7.6
7.6
ns
tPHZ
HIGH to OFF-state
propagation delay
DIR to A
9.4
9.4
9.4
9.4
9.4
9.4
ns
DIR to B
12.0
9.4
9.0
7.8
8.4
7.9
ns
tPLZ
LOW to OFF-state
propagation delay
DIR to A
7.1
7.1
7.1
7.1
7.1
7.1
ns
DIR to B
9.5
7.8
7.7
6.9
7.6
7.0
ns
tPZH
OFF-state to HIGH
propagation delay
DIR to A
[1]
20.1
17.3
16.7
15.4
15.9
15.2
ns
DIR to B
[1]
17.7
15.2
14.1
12.9
12.4
12.2
ns
tPZL
OFF-state to LOW
propagation delay
DIR to A
[1]
22.1
18.0
17.1
15.6
16.0
15.5
ns
DIR to B
[1]
19.5
16.5
15.4
14.7
14.6
14.8
ns
Table 10.
Typical dynamic characteristics at VCC(B) = 1.2 V and Tamb = 25 °C
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9; for waveforms see Figure 7 and Figure 8.
Symbol Parameter
Conditions
VCC(A)
Unit
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
5.0 V
tPLH
LOW to HIGH
propagation delay
A to B
10.6
9.5
9.0
8.5
8.3
8.2
ns
B to A
10.6
8.1
7.0
5.8
5.3
5.1
ns
tPHL
HIGH to LOW
propagation delay
A to B
10.1
8.6
8.1
7.8
7.6
7.6
ns
B to A
10.1
7.1
6.0
5.3
5.2
5.4
ns
tPHZ
HIGH to OFF-state
propagation delay
DIR to A
9.4
6.5
5.7
4.1
4.1
3.0
ns
DIR to B
12.0
6.1
5.4
4.6
4.3
4.0
ns
tPLZ
LOW to OFF-state
propagation delay
DIR to A
7.1
4.9
4.5
3.2
3.4
2.5
ns
DIR to B
9.5
7.3
6.6
5.9
5.7
5.6
ns
tPZH
OFF-state to HIGH
propagation delay
DIR to A
[1]
20.1
15.4
13.6
11.7
11.0
10.7
ns
DIR to B
[1]
17.7
14.4
13.5
11.7
11.7
10.7
ns
tPZL
OFF-state to LOW
propagation delay
DIR to A
[1]
22.1
13.2
11.4
9.9
9.5
9.4
ns
DIR to B
[1]
19.5
15.1
13.8
11.9
11.7
10.6
ns


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