Specifications

Technical Reference

Legislation and Compliance

Product Details

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Select all	Attribute	Value
	Brand	Nexperia
	Logic Family	4000
	Logic Function	Monostable Multivibrator
	Number of Elements per Chip	2
	Minimum Pulse Width	20 ns
	Maximum Propagation Delay Time @ Maximum CL	460 ns @ 5 V
	Maximum Quiescent Current	0.08mA
	Mounting Type	Surface Mount
	Package Type	SOIC
	Pin Count	16
	Dimensions	10 x 4 x 1.45mm
	Height	1.45mm
	Length	10mm
	Minimum Operating Supply Voltage	3 V
	Maximum Operating Temperature	+85 °C
	Maximum Operating Supply Voltage	15 V
	Width	4mm
	Minimum Operating Temperature	-40 °C

	Select all
	Brand Nexperia
	Logic Family 4000
	Logic Function Monostable Multivibrator
	Number of Elements per Chip 2
	Minimum Pulse Width 20 ns
	Maximum Propagation Delay Time @ Maximum CL 460 ns @ 5 V
	Maximum Quiescent Current 0.08mA
	Mounting Type Surface Mount
	Package Type SOIC
	Pin Count 16
	Dimensions 10 x 4 x 1.45mm
	Height 1.45mm
	Length 10mm
	Minimum Operating Supply Voltage 3 V
	Maximum Operating Temperature +85 °C
	Maximum Operating Supply Voltage 15 V
	Width 4mm
	Minimum Operating Temperature -40 °C

COO (Country of Origin):: TH

The HEF4538B is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has an active LOW trigger/retrigger input (nA), an active HIGH trigger/retrigger input (nB), an overriding active LOW direct reset input (nCD), an output (nQ) and its complement (nQ), and two pins (nREXT/CEXT, and nCEXT, always connected to ground) for connecting the external timing components CEXT and REXT. Typical pulse width variation over the specified temperature range is ±0.2 %. The multivibrator may be triggered by either the positive or the negative edges of the input pulse and will produce an accurate output pulse with a pulse width range of 10 μs to infinity. The duration and accuracy of the output pulse are determined by the external timing components CEXT and REXT.

Simple control interface

Power on reset

Dual devices with separate reset inputs

Negative or positive edge triggered

CMOS low power

Key applications

Timing delays in control circuits

Nexperia HEF4538BT,652, Dual Monostable Multivibrator, 16-Pin SOIC