HEF4028B datasheet(5/5 Pages) PHILIPS

Part #	HEF4028B

Description	1-of-10 decoder

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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5 / 5 page

January 1995

5

Philips Semiconductors

Product speciﬁcation

1-of-10 decoder

HEF4028B

MSI

AC CHARACTERISTICS

VSS =0V; Tamb =25 °C; CL = 50 pF; input transition times ≤ 20 ns

VDD

V

SYMBOL

TYP.

MAX.

TYPICAL EXTRAPOLATION

FORMULA

Propagation delays

An → On

5

tPHL

100

200

ns

73 ns

+ (0,55 ns/pF) CL

HIGH to LOW

10

40

80

ns

29 ns

+ (0,23 ns/pF) CL

15

30

60

ns

22 ns

+ (0,16 ns/pF) CL

5

tPLH

90

180

ns

63 ns

+ (0,55 ns/pF) CL

LOW to HIGH

10

40

80

ns

29 ns

+ (0,23 ns/pF) CL

15

30

60

ns

22 ns

+ (0,16 ns/pF) CL

Output transition times

5

tTHL

60

120

ns

10 ns

+ (1,0 ns/pF) CL

HIGH to LOW

10

30

60

ns

9 ns

+ (0,42 ns/pF) CL

15

20

40

ns

6 ns

+ (0,28 ns/pF) CL

5

60

120

ns

10 ns

+ (1,0 ns/pF) CL

LOW to HIGH

10

tTLH

30

60

ns

9 ns

+ (0,42 ns/pF) CL

15

20

40

ns

6 ns

+ (0,28 ns/pF) CL

VDD

V

TYPICAL FORMULA FOR P (

µW)

Dynamic power

5

350 fi +∑ (foCL) × VDD 2

where

dissipation per

10

2 200 fi +∑ (foCL) × VDD 2

fi = input freq. (MHz)

package (P)

15

7 350 fi +∑ (foCL) × VDD 2

fo = output freq. (MHz)

CL = total load cap. (pF)

∑ (foCL) = sum of outputs

VDD = supply voltage (V)

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