HEF4528B_15 Datasheet, PDF(1/17 Page) NXP Semiconductors

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HEF4528B_15 Datasheet, PDF (1/17 Pages) NXP Semiconductors – Dual monostable multivibrator

HEF4528B

Dual monostable multivibrator

Rev. 7 â 22 November 2011

Product data sheet

1. General description

The HEF4528B is a dual retriggerable-resetable monostable multivibrator. Each

multivibrator has an active LOW input (nA), and active HIGH input (nB), an active LOW

clear direct input (nCD), an output (nQ) and its complement (nQ), and two external timing

component connecting pins (nCEXT, always connected to ground, and nREXT/CEXT).

An external timing capacitor (CEXT) must be connected between nCEXT and

nREXT/CEXT and an external resistor (REXT) must be connected between nREXT/CEXT

and VDD. The output pulse duration is determined by the external timing components

CEXT and REXT. A HIGH-to-LOW transition on nA when nB is LOW or a LOW-to-HIGH

transition on nB when nA is HIGH produces a positive pulse (LOW-HIGH-LOW) on nQ

and a negative pulse (HIGH-LOW-HIGH) on nQ if the nCD is HIGH. A LOW on nCD

forces nQ LOW, nQ HIGH and inhibits any further pulses until nCD is HIGH.

It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS

(usually ground). Unused inputs must be connected to VDD, VSS, or another input.

2. Features and benefits

ï® Fully static operation

ï® 5 V, 10 V, and 15 V parametric ratings

ï® Standardized symmetrical output characteristics

ï® Specified from ï40 ï°C to +85 ï°C

ï® Complies with JEDEC standard JESD 13-B

3. Ordering information

Table 1. Ordering information

All types operate from ï40 ï°C to +85 ï°C.

Type number

Package

Name

Description

HEF4528BP

DIP16

plastic dual in-line package; 16 leads (300 mil)

HEF4528BT

SO16

plastic small outline package; 16 leads; body width 3.9 mm

Version

SOT38-4

SOT109-1

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