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74LVCH1T45GF Datasheet PDF : 30 Pages
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NXP Semiconductors
74LVC1T45; 74LVCH1T45
Dual supply translating transceiver; 3-state
11. Dynamic characteristics
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 8; for waveforms see Figure 6 and Figure 7
Symbol Parameter
Conditions
1.2 V
1.5 V
VCC(B)
1.8 V 2.5 V
3.3 V
Unit
5.0 V
tPLH
LOW to HIGH
A to B
propagation delay
B to A
10.6
8.1
7.0
5.8
5.3
5.1 ns
10.6
9.5
9.0
8.5
8.3
8.2 ns
tPHL
HIGH to LOW
A to B
propagation delay
B to A
10.1
7.1
6.0
5.3
5.2
5.4 ns
10.1
8.6
8.1
7.8
7.6
7.6 ns
tPHZ
HIGH to OFF-state DIR to A
propagation delay
DIR to B
9.4
9.4
9.4
9.4
9.4
9.4 ns
12.0
9.4
9.0
7.8
8.4
7.9 ns
tPLZ
LOW to OFF-state
DIR to A
propagation delay
DIR to B
7.1
7.1
7.1
7.1
7.1
7.1 ns
9.5
7.8
7.7
6.9
7.6
7.0 ns
tPZH
OFF-state to HIGH DIR to A
propagation delay
DIR to B
[1] 20.1
[1] 17.7
17.3
15.2
16.7
14.1
15.4
12.9
15.9
12.4
15.2 ns
12.2 ns
tPZL
OFF-state to LOW
DIR to A
propagation delay
DIR to B
[1] 22.1
[1] 19.5
18.0
16.5
17.1
15.4
15.6
14.7
16.0
14.6
15.5 ns
14.8 ns
[1] tPZH and tPZL are calculated values using the formula shown in Section 14.4 “Enable times”
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 8; for waveforms see Figure 6 and Figure 7
Symbol Parameter
Conditions
1.2 V
1.5 V
VCC(A)
1.8 V 2.5 V
3.3 V
Unit
5.0 V
tPLH
LOW to HIGH
A to B
propagation delay
B to A
10.6
9.5
9.0
8.5
8.3
8.2 ns
10.6
8.1
7.0
5.8
5.3
5.1 ns
tPHL
HIGH to LOW
A to B
propagation delay
B to A
10.1
8.6
8.1
7.8
7.6
7.6 ns
10.1
7.1
6.0
5.3
5.2
5.4 ns
tPHZ
HIGH to OFF-state DIR to A
propagation delay
DIR to B
9.4
6.5
5.7
4.1
4.1
3.0 ns
12.0
6.1
5.4
4.6
4.3
4.0 ns
tPLZ
LOW to OFF-state
DIR to A
propagation delay
DIR to B
7.1
4.9
4.5
3.2
3.4
2.5 ns
9.5
7.3
6.6
5.9
5.7
5.6 ns
tPZH
OFF-state to HIGH DIR to A
propagation delay
DIR to B
[1] 20.1
15.4
13.6
11.7
11.0
10.7 ns
[1] 17.7
14.4
13.5
11.7
11.7
10.7 ns
tPZL
OFF-state to LOW
DIR to A
propagation delay
DIR to B
[1] 22.1
13.2
11.4
9.9
9.5
9.4 ns
[1] 19.5
15.1
13.8
11.9
11.7
10.6 ns
[1] tPZH and tPZL are calculated values using the formula shown in Section 14.4 “Enable times”
74LVC_LVCH1T45_2
Product data sheet
Rev. 02 — 19 January 2010
© NXP B.V. 2010. All rights reserved.
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