74HC154 datasheet(14/22 Pages) PHILIPS

Part #	74HC154

Description	4-to-16 line decoder/demultiplexer

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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14 / 22 page

2004 Oct 12

14

Philips Semiconductors

Product speciﬁcation

4-to-16 line decoder/demultiplexer

74HC154; 74HCT154

Type 74HCT154

GND = 0 V; tr =tf = 6 ns; CL =50pF.

SYMBOL

PARAMETER

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

WAVEFORMS

VCC (V)

Tamb =25 °C

tPHL/tPLH

propagation delay An to Yn

see Figs 7 and 9

4.5

−

16

35

ns

propagation delay En to Yn

see Figs 8 and 9

4.5

−

15

32

ns

tTHL/tTLH

output transition time

see Figs 7, 8 and 9

4.5

−

715

ns

Tamb = −40 °C to +85 °C

tPHL/tPLH

propagation delay An to Yn

see Figs 7 and 9

4.5

−−

44

ns

propagation delay En to Yn

see Figs 8 and 9

4.5

−−

40

ns

tTHL/tTLH

output transition time

see Figs 7, 8 and 9

4.5

−−

19

ns

Tamb = −40 °C to +125 °C

tPHL/tPLH

propagation delay An to Yn

see Figs 7 and 9

4.5

−−

53

ns

propagation delay En to Yn

see Figs 8 and 9

4.5

−−

48

ns

tTHL/tTLH

output transition time

see Figs 7, 8 and 9

4.5

−−

22

ns

AC WAVEFORMS

001aab073

tPLH

tTLH

90 %

10 %

VM

tTHL

90 %

10 %

VM

An input

Yn output

GND

VI

VOH

VOL

For 74HC154: VM = 50 %; VI = GND to VCC.

For 74HCT154: VM = 1.3 V; VI = GND to 3 V.

Fig.7

The input (An) to output (Yn) propagation

delays and the output transition times.

001aab074

tTHL

90 %

10 %

En input

Yn output

GND

VI

VOH

VOL

tPHL

tPLH

VM

tTLH

90 %

10 %

VM

For 74HC154: VM = 50 %; VI = GND to VCC.

For 74HCT154: VM = 1.3 V; VI = GND to 3 V.

Fig.8

The enable input (En) to output (Yn)

propagation delays and the output transition

times.

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