74HC258 datasheet(8/14 Pages) NXP

部件名	74HC258

功能描述	Quad 2-input multiplexer; 3-state; inverting

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制造商	NXP [NXP Semiconductors]

网页	http://www.nxp.com

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8 / 14 page

74HC258_4

Product data sheet

Rev. 04 — 14 April 2008

8 of 14

NXP Semiconductors

74HC258

Quad 2-input multiplexer; 3-state; inverting

Test data is given in Table 9.

Deﬁnitions test circuit:

RT = Termination resistance should be equal to output impedance Zo of the pulse generator.

CL = Load capacitance including jig and probe capacitance.

RL = Load resistance.

S1 = Test selection switch.

Fig 8.

Test circuit for measuring switching times

VM

tW

10 %

90 %

0 V

VI

negative

pulse

positive

pulse

0 V

VM

90 %

10 %

tf

tr

tf

001aad983

DUT

VCC

VI

VO

RT

RL

S1

CL

open

G

Table 9.

Test data

Supply voltage

Input

Load

S1

VCC

VI

tr = tf

CL

RL

tPZL, tPLZ

tPZH, tPHZ

tPHL, tPLH

2.0 V

VCC

6 ns

50 pF

1 k

Ω

VCC

GND

open

4.5 V

VCC

6 ns

50 pF

1 k

Ω

VCC

GND

open

6.0 V

VCC

6 ns

50 pF

1 k

Ω

VCC

GND

open

5.0 V

VCC

6 ns

15 pF

1 k

Ω

VCC

GND

open

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类似说明 - 74HC258

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