HEF40374 查看數據表（PDF） - Philips Electronics

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HEF40374

Octal D-type flip-flop with 3-state outputs

Philips Electronics 

Philips Semiconductors

Octal D-type flip-flop with 3-state outputs

Product specification

HEF40374B

MSI

Minimum clock

pulse width; LOW

Maximum clock

pulse frequency

VDD

V

SYMBOL MIN. TYP.

MAX.

5

50 25

ns

10 tWCPL

25 12

ns

15

20 10

ns

5

25

5

MHz

10 fmax

15

6 12

8 17

MHz

MHz

TYPICAL EXTRAPOLATION

FORMULA

AC CHARACTERISTICS

VSS = 0 V; Tamb = 25 °C; input transition times ≤ 20 ns

Dynamic power

dissipation per

package (P)

VDD

V

TYPICAL FORMULA FOR P (µW)

5

3 775 fi + ∑ (foCL) × VDD2

10

15 700 fi + ∑ (foCL) × VDD2

15

40 575 fi + ∑ (foCL) × VDD2

where

fi = input freq. (MHz)

fo = output freq. (MHz)

CL = load capacitance (pF)

∑ (foCL) = sum of outputs

VDD = supply voltage (V)

 tTLH

− − − − tTHL

Fig.6 Output transition times as a function of the load capacitance. .

January 1995

7

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