74AHCT244 データシートの表示（PDF） - NXP Semiconductors.

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74AHCT244

Octal buffer/line driver; 3-state

NXP Semiconductors. 

NXP Semiconductors

74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

10. Dynamic characteristics

Table 7. Dynamic characteristics

GND = 0 V. For test circuit see Figure 8.

Symbol Parameter Conditions

For type 74AHC244

tpd

propagation nAn to nYn; see Figure 6

delay

VCC = 3.0 V to 3.6 V

CL = 15 pF

CL = 50 pF

VCC = 4.5 V to 5.5 V

CL = 15 pF

CL = 50 pF

ten

enable time nOE to nYn; see Figure 7

VCC = 3.0 V to 3.6 V

CL = 15 pF

CL = 50 pF

VCC = 4.5 V to 5.5 V

CL = 15 pF

CL = 50 pF

tdis

disable time nOE to nYn; see Figure 7

VCC = 3.0 V to 3.6 V

CL = 15 pF

CL = 50 pF

VCC = 4.5 V to 5.5 V

CL = 15 pF

CL = 50 pF

CPD

power

CL = 50 pF; fi = 1 MHz;

dissipation VI = GND to VCC

capacitance

25 °C

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

Min Typ[1] Max Min

Max

Min

Max

[2]

- 5.0 8.4 1.0

10.0

1.0

- 7.0 11.9 1.0

13.5

1.0

10.5 ns

15.0 ns

- 3.4 5.5 1.0

6.5

1.0

7.0 ns

5.0 7.5 1.0

8.5

1.0

9.5 ns

[2]

- 6.5 10.6 1.0

12.5

1.0

- 7.5 14.1 1.0

16.0

1.0

13.5 ns

18.0 ns

- 4.0 7.3 1.0

8.5

1.0

9.5 ns

- 5.5 9.3 1.0

10.5

1.0

12.0 ns

[2]

- 5.5 9.7 1.0

11.0

1.0

- 10.0 14.0 1.0

16.0

1.0

12.5 ns

17.5 ns

- 4.8 7.2 1.0

8.5

1.0

9.0 ns

- 7.0 9.2 1.0

10.5

1.0

11.5 ns

[3] -

10 -

-

-

-

-

pF

74AHC_AHCT244_5

Product data sheet

Rev. 05 — 20 December 2007

© NXP B.V. 2007. All rights reserved.

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