74HC4538DB datasheet(2/13 Pages) PHILIPS

Part #	74HC4538DB

Description	Dual retriggerable precision monostable multivibrator

Download	13 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

Logo

2 / 13 page

September 1993

2

Philips Semiconductors

Product speciﬁcation

Dual retriggerable precision monostable

multivibrator

74HC/HCT4538

FEATURES

• Separate reset inputs

• Triggering from leading or trailing edge

• Output capability: standard

• ICC category: MSI

• Power-on reset on-chip

GENERAL DESCRIPTION

The 74HC/HCT4538 are high-speed Si-gate CMOS

devices and are pin compatible with “4538” of the “4000B”

series. They are specified in compliance with JEDEC

standard no. 7A.

The 74HC/HCT4538 are dual retriggerable-resettable

monostable multivibrators. Each multivibrator has an

active LOW trigger/retrigger input (nA0), an active HIGH

trigger/retrigger input (nA1) , an overriding active LOW

direct reset input (nRD), an output (nQ) and its complement

(nQ), and two pins (nCTC and nRCTC) for connecting the

external timing components Ct and Rt. Typical pulse width

variation over temperature range is

± 0.2%.

The “4538” may be triggered by either the positive or the

negative edges of the input pulse. The duration and

accuracy of the output pulse are determined by the

external timing components Ct and Rt. The output pulse

width (T) is equal to 0.7

× Rt × Ct. The linear design

techniques guarantee precise control of the output pulse

width.

A LOW level at nRD terminates the output pulse

immediately.

Schmitt-trigger action in the trigger inputs makes the circuit

highly tolerant to slower rise and fall times.

QUICK REFERENCE DATA

GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns

Notes

1. CPD is used to determine the dynamic power dissipation (PD in µW):

PD = CPD × VCC2 × fi +∑ (CL × VCC2 × fo) +

+ 0.48 × CEXT × VCC2 × fo + D × 0.8 × VCC where:

fi = input frequency in MHz

fo = output frequency in MHz

∑ (CL × VCC2 × fo) = sum of outputs

CL = output load capacitance in pF

VCC = supply voltage in V

D = duty factor in %

CEXT = timing capacitance in pF

2. For HC the condition is VI = GND to VCC

For HCT the condition is VI = GND to VCC − 1.5 V

ORDERING INFORMATION

See

“74HC/HCT/HCU/HCMOS Logic Package Information”.

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

HC

HCT

tPHL/ tPLH

propagation delay nA0,nA1 to nQ, nQCL = 15 pF; VCC = 5 V

27

30

ns

CI

input capacitance

3.5

pF

CPD

power dissipation capacitance per multivibrator

notes 1 and 2

136

138

pF

Similar Part No. - 74HC4538DB

Manufacturer	Part #	Datasheet	Description
Toshiba Semiconductor	74HC4538D	269Kb / 15P	CMOS Digital Integrated Circuits Silicon Monolithic 2017-01-24 Rev.6.0
Nexperia B.V. All right...	74HC4538D	293Kb / 17P	Dual retriggerable precision monostable multivibrator Rev. 6 - 16 July 2021
Nexperia B.V. All right...	74HC4538D-Q100	256Kb / 20P	Dual retriggerable precision monostable multivibrator

More results

Similar Description - 74HC4538DB

Manufacturer	Part #	Datasheet	Description
Nexperia B.V. All right...	74HC4538	293Kb / 17P	Dual retriggerable precision monostable multivibrator Rev. 6 - 16 July 2021
	74HC4538-Q100	256Kb / 20P	Dual retriggerable precision monostable multivibrator
	74HCT4538-Q100	252Kb / 20P	Dual retriggerable precision monostable multivibrator
NXP Semiconductors	74HC_HCT4538	150Kb / 24P	Dual retriggerable precision monostable multivibrator Rev. 03-8 June 2009
Nexperia B.V. All right...	74HCT4538	274Kb / 16P	Dual retriggerable precision monostable multivibrator Rev. 6 - 11 February 2021
Toshiba Semiconductor	TC4538BP	252Kb / 6P	DUAL PRECISION RETRIGGERABLE/RESETTABLE MONOSTABLE MULTIVIBRATOR
ON Semiconductor	MC74HC4538A	291Kb / 16P	Dual Precision Monostable Multivibrator(Retriggerable, Resettable) April, 2001 ??Rev. 8
ON Semiconductor	MC14538B	151Kb / 12P	Dual Precision Retriggerable/Resettable Monostable Multivibrator August, 2005 ??Rev. 7
Toshiba Semiconductor	TC4538BP	361Kb / 9P	Dual Precision Retriggerable/Resettable Monostable Multivibrator
Hitachi Semiconductor	HD14538B	116Kb / 8P	Dual Precision Retriggerable/Resettable Monostable Multivibrator

More results

74HC4538DB Datasheet(PDF) 2 Page - NXP Semiconductors

74HC4538DB Datasheet(HTML) 2 Page - NXP Semiconductors

Similar Part No. - 74HC4538DB

Similar Description - 74HC4538DB

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13

Datasheet Download

Link URL