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74HC423: DescriptionDual retriggerable monostable multivibrator with reset; File Size125KB，23 Pages; ManufacturerNXP; Websitehttps://www.nxp.com

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74HC423 Overview

Dual retriggerable monostable multivibrator with reset

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74HC423; 74HCT423

Dual retriggerable monostable multivibrator with reset

Rev. 03 — 24 July 2008

Product data sheet

1. General description

74HC423; 74HCT423 are high-speed Si-gate CMOS devices that are pin compatible with

low power Schottky TTL (LSTTL). They are speciﬁed in compliance with JEDEC

standard no. 7A.

The 74HC423; 74HCT423 dual retriggerable monostable multivibrator with reset has two

methods of output pulse width control.

1. The minimum pulse width is essentially determined by the selection of an external

resistor (R

EXT

) and capacitor (C

EXT

), see

Section 12.1.

2. Once triggered, the basic output pulse width may be extended by retriggering the

gated active LOW-going edge input (nA) or the active HIGH-going edge input (nB). By

repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made

as long as desired. When nRD is LOW, it forces the nQ output LOW, the nQ output

HIGH and also inhibits the triggering.

Figure 10

and

Figure 11

illustrate pulse control

by reset.

The nA and nB inputs’ Schmitt trigger action makes them highly tolerant to slower input

rise and fall times.

The 74HC423; 74HCT423 are identical to the 74HC123; 74HCT123 except that they

cannot be triggered via the reset input.

2. Features

DC triggered from active HIGH or active LOW inputs

Retriggerable for very long pulses up to 100% duty factor

Direct reset terminates output pulse

Schmitt-trigger action on all inputs except for the reset input

Complies with JEDEC standard no. 7A

ESD protection:

HBM JESD22-A114E exceeds 2000 V

MM JESD22-A115-A exceeds 200 V

Speciﬁed from

−40 °C

to +85

°C

and from

−40 °C

to +125

°C

74HC423 Related Products

	74HC423	74HC423D	74HC423BQ	74HC423N	74HCT423	74HCT423D	74HCT423BQ	74HCT423PW	74HCT423N	74HCT423DB
Description	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset	Dual retriggerable monostable multivibrator with reset
Is it lead-free?	-	Lead free	Lead free	Lead free	-	Lead free	Lead free	Lead free	Lead free	Lead free
Is it Rohs certified?	-	conform to	conform to	conform to	-	conform to	conform to	conform to	conform to	conform to
Maker	-	NXP	NXP	NXP	-	NXP	NXP	NXP	NXP	NXP
Parts packaging code	-	SOIC	QFN	DIP	-	SOIC	QFN	TSSOP	DIP	SSOP
package instruction	-	SOP, SOP16,.25	2.5 X 3.5 MM, 0.85 MM HEIGHT, PLASTIC, MO-241, SOT763-1, VQFN-16	DIP, DIP16,.3	-	SOP, SOP16,.25	2.5 X 3.5 MM, 0.85 MM HEIGHT, PLASTIC, MO-241, SOT763-1, VQFN-16	TSSOP, TSSOP16,.25	DIP, DIP16,.3	SSOP, SSOP16,.3
Contacts	-	16	16	16	-	16	16	16	16	16
Reach Compliance Code	-	unknow	compli	unknow	-	unknow	compli	unknow	unknow	unknow
Other features	-	RETRIGGERABLE	RETRIGGERABLE	RETRIGGERABLE	-	RETRIGGERABLE	RETRIGGERABLE	RETRIGGERABLE	RETRIGGERABLE	RETRIGGERABLE
series	-	HC/UH	HC/UH	HC/UH	-	HCT	HCT	HCT	HCT	HCT
JESD-30 code	-	R-PDSO-G16	R-PDSO-N16	R-PDIP-T16	-	R-PDSO-G16	R-PDSO-N16	R-PDSO-G16	R-PDIP-T16	R-PDSO-G16
length	-	9.9 mm	3.5 mm	19.025 mm	-	9.9 mm	3.5 mm	5 mm	19.025 mm	6.2 mm
Load capacitance (CL)	-	50 pF	-	50 pF	-	50 pF	-	50 pF	50 pF	50 pF
Logic integrated circuit type	-	MONOSTABLE MULTIVIBRATOR	MONOSTABLE MULTIVIBRATOR	MONOSTABLE MULTIVIBRATOR	-	MONOSTABLE MULTIVIBRATOR	MONOSTABLE MULTIVIBRATOR	MONOSTABLE MULTIVIBRATOR	MONOSTABLE MULTIVIBRATOR	MONOSTABLE MULTIVIBRATOR
Humidity sensitivity level	-	1	1	-	-	1	1	1	-	1
Number of data/clock inputs	-	2	2	2	-	2	2	2	2	2
Number of functions	-	2	2	2	-	2	2	2	2	2
Number of terminals	-	16	16	16	-	16	16	16	16	16
Maximum operating temperature	-	125 °C	125 °C	125 °C	-	125 °C	125 °C	125 °C	125 °C	125 °C
Minimum operating temperature	-	-40 °C	-40 °C	-40 °C	-	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Output polarity	-	COMPLEMENTARY	COMPLEMENTARY	COMPLEMENTARY	-	COMPLEMENTARY	COMPLEMENTARY	COMPLEMENTARY	COMPLEMENTARY	COMPLEMENTARY
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	SOP	HVSON	DIP	-	SOP	HVSON	TSSOP	DIP	SSOP
Encapsulate equivalent code	-	SOP16,.25	LCC16,.1X.14,20	DIP16,.3	-	SOP16,.25	LCC16,.1X.14,20	TSSOP16,.25	DIP16,.3	SSOP16,.3
Package shape	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	IN-LINE	-	SMALL OUTLINE	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	IN-LINE	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	260	260	NOT SPECIFIED	-	260	260	260	NOT SPECIFIED	260
power supply	-	2/6 V	2/6 V	2/6 V	-	5 V	5 V	5 V	5 V	5 V
propagation delay (tpd)	-	77 ns	77 ns	77 ns	-	77 ns	77 ns	77 ns	77 ns	77 ns
Certification status	-	Not Qualified	Not Qualified	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1.75 mm	1 mm	4.2 mm	-	1.75 mm	1 mm	1.1 mm	4.2 mm	2 mm
Maximum supply voltage (Vsup)	-	6 V	6 V	6 V	-	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V
Minimum supply voltage (Vsup)	-	2 V	2 V	2 V	-	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V
Nominal supply voltage (Vsup)	-	4.5 V	4.5 V	4.5 V	-	5 V	5 V	5 V	5 V	5 V
surface mount	-	YES	YES	NO	-	YES	YES	YES	NO	YES
technology	-	CMOS	CMOS	CMOS	-	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	-	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE	-	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE
Terminal surface	-	NICKEL/PALLADIUM/GOLD (NI/PD/AU)	NICKEL PALLADIUM GOLD	NICKEL PALLADIUM GOLD	-	NICKEL PALLADIUM GOLD	NICKEL PALLADIUM GOLD	NICKEL PALLADIUM GOLD	NICKEL PALLADIUM GOLD	NICKEL PALLADIUM GOLD
Terminal form	-	GULL WING	NO LEAD	THROUGH-HOLE	-	GULL WING	NO LEAD	GULL WING	THROUGH-HOLE	GULL WING
Terminal pitch	-	1.27 mm	0.5 mm	2.54 mm	-	1.27 mm	0.5 mm	0.65 mm	2.54 mm	0.65 mm
Terminal location	-	DUAL	DUAL	DUAL	-	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	30	30	NOT SPECIFIED	-	30	30	30	NOT SPECIFIED	30
width	-	3.9 mm	2.5 mm	7.62 mm	-	3.9 mm	2.5 mm	4.4 mm	7.62 mm	5.3 mm
Base Number Matches	-	1	1	1	-	1	1	1	1	1
JESD-609 code	-	-	e4	e4	-	e4	e4	e4	e4	e4

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