74HC258DB datasheet(6/16 Pages) PHILIPS

6 / 16 page

1999 Sep 02

Philips Semiconductors

Product speciﬁcation

Quad 2-input multiplexer; 3-state; inverting

74HC/HCT258

DC CHARACTERISTICS FOR 74HCT

For the DC characteristics see chapter

“HCMOS family characteristics”, section “Family specifications”.

Output capability: bus driver.

ICC category: MSI.

Note to HCT types

The value of additional quiescent supply current (

∆ICC) for a unit load of 1 is given in the family specifications.

To determine

∆ICC per input, multiply this value by the unit load coefficient shown in Table 1.

Table 1

AC CHARACTERISTICS FOR 74HCT

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

INPUT

UNIT LOAD COEFFICIENT

nI0

0.50

nI1

0.50

1.50

SYMBOL

PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

−40 to +85

−40 to +125

VCC

(V)

WAVEFORMS

MIN.

TYP.

MAX.

MIN.

MAX.

MIN.

MAX.

tPHL/tPLH

propagation delay;

nI0 to nY; nI1 to nY

−

4.5

see Fig.6

propagation delay;

StonY

−

4.5

see Fig.6

tPZH/tPZL

3-state output enable

time; OE to nY

−

4.5

see Fig.7

tPHZ/tPLZ

3-state output disable

time; OE to nY

−

4.5

see Fig.7

tTHL/tTLH

output transition time

−

512

−

4.5

see Fig.6

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