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74AHC245BQ
(Rev.:2009)

Octal bus transceiver; 3-state

NXP Semiconductors. 

Nexperia

74AHC245; 74AHCT245

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

25 °C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min Typ[1] Max Min

Max

Min

Max

74AHC245

tpd

propagation An to Bn; Bn to An;

[2]

delay

see Figure 5

VCC = 3.0 V to 3.6 V

CL = 15 pF

- 5.0 8.4 1.0

10.0

1.0

10.5 ns

CL = 50 pF

- 6.5 11.9 1.0

13.5

1.0

15.0 ns

VCC = 4.5 V to 5.5 V

CL = 15 pF

- 3.5 5.5 1.0

6.5

1.0

7.0 ns

CL = 50 pF

5.0 7.5 1.0

8.5

1.0

9.5 ns

ten

enable time OE to An; OE to Bn;

[3]

signal name DIR;

see Figure 6

VCC = 3.0 V to 3.6 V

CL = 15 pF

- 6.5 13.2 1.0

15.5

1.0

16.5 ns

CL = 50 pF

- 9.0 16.7 1.0

19.0

1.0

21.0 ns

VCC = 4.5 V to 5.5 V

CL = 15 pF

- 4.0 8.5 1.0

10.0

1.0

11.0 ns

CL = 50 pF

- 5.0 10.6 1.0

12.0

1.0

13.5 ns

tdis

disable time OE to An; OE to Bn;

[4]

signal name DIR;

see Figure 6

VCC = 3.0 V to 3.6 V

CL = 15 pF

- 7.5 12.5 1.0

15.5

1.0

16.0 ns

CL = 50 pF

- 10.0 15.8 1.0

18.0

1.0

20.0 ns

VCC = 4.5 V to 5.5 V

CL = 15 pF

- 4.5 7.8 1.0

9.2

1.0

10.0 ns

CL = 50 pF

- 6.0 9.7 1.0

11.0

1.0

12.5 ns

CPD

power

fi = 1 MHz;

dissipation VI = GND to VCC

capacitance

[5] -

12 -

-

-

-

-

pF

74AHCT245; VCC = 4.5 V to 5.5 V

tpd

propagation An to Bn; Bn to An;

[2]

delay

see Figure 5

CL = 15 pF

CL = 50 pF

ten

enable time OE to An; OE to Bn;

signal name DIR;

see Figure 6

- 3.5 7.7 1.0

8.5

1.0

10.0 ns

- 4.5 8.7 1.0

9.5

1.0

11.0 ns

[3]

CL = 15 pF

CL = 50 pF

- 5.0 13.8 1.0

15.0

1.0

- 6.0 14.8 1.0

16.0

1.0

17.5 ns

18.5 ns

74AHC_AHCT245_5

Product data sheet

Rev. 05 — 28 April 2009

© Nexperia B.V. 2017. All rights reserved

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