74AHC157BQ datasheet(10/16 Pages) NXP

No de pièce	74AHC157BQ

Description	Quad 2-input multiplexer

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Fabricant	NXP [NXP Semiconductors]

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74AHC_AHCT157_2

Product data sheet

Rev. 02 — 9 November 2007

10 of 16

NXP Semiconductors

74AHC157; 74AHCT157

Quad 2-input multiplexer

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 resistor

S1 = Test selection switch

Fig 9.

Load circuitry for 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

PULSE

GENERATOR

Table 9.

Test data

Type

Input

Load

S1 position

VI

tr, tf

CL

RL

tPHL, tPLH

tPZH, tPHZ

tPZL, tPLZ

74AHC157

VCC

3.0 ns

15 pF, 50 pF

1 k

Ω

open

GND

VCC

74AHCT157

3.0 V

3.0 ns

15 pF, 50 pF

1 k

Ω

open

GND

VCC

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