74AHCT123APW データシートの表示（PDF） - NXP Semiconductors.

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74AHCT123APW

Dual retriggerable monostable multivibrator with reset

NXP Semiconductors. 

NXP Semiconductors

74AHC123A; 74AHCT123A

Dual retriggerable monostable multivibrator with reset

VCC

REXT

Fig 11. Timing component connections

CEXT

to nCEXT

(pin 14 or 6)

to nREXT/CEXT

(pin 15 or 7)

mna519

tW

VI 90 %

negative

pulse

VM

10 %

0V

tf

VI

positive

pulse

tr

90 %

VM

10 %

0V

tW

VM

tr

tf

VM

PULSE

VI

GENERATOR

VCC

VO

DUT

RT

VCC

RL S1

CL

open

001aad983

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 12. Load circuitry for switching times

Table 9. Test data

Type

Input

74AHC123A

74AHCT123A

VI

VCC

3.0 V

tr, tf

3.0 ns

3.0 ns

Load

CL

15 pF, 50 pF

15 pF, 50 pF

RL

1 kΩ

1 kΩ

S1 position

tPHL, tPLH

open

open

tPZH, tPHZ

GND

GND

tPZL, tPLZ

VCC

VCC

74AHC_AHCT123A_2

Product data sheet

Rev. 02 — 18 January 2008

© NXP B.V. 2008. All rights reserved.

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