Philips HEF4049BU, HEF4049BT, HEF4049BPB, HEF4049BP, HEF4049BDB Datasheet

INTEGRATED CIRCUITS

DATA SHEET

For a complete data sheet, please also download:

∙The IC04 LOCMOS HE4000B Logic Family Specifications HEF, HEC

∙The IC04 LOCMOS HE4000B Logic Package Outlines/Information HEF, HEC

HEF4049B buffers

HEX inverting buffers

Product specification			January 1995
File under Integrated Circuits, IC04

Philips Semiconductors	Product specification

HEX inverting buffers

HEF4049B buffers

DESCRIPTION

The HEF4049B provides six inverting buffers with high current output capability suitable for driving TTL or high capacitive loads. Since input voltages in excess of the buffers’ supply voltage are permitted, the buffers may also be used to convert logic levels of up to 15 V to standard TTL levels. Their guaranteed fan-out into common bipolar logic elements is shown in the table below.

Fig.1 Functional diagram.

HEF4049BP(N): 16-lead DIL; plastic (SOT38-1) HEF4049BD(F): 16-lead DIL; ceramic (cerdip) (SOT74) HEF4049BT(D): 16-lead SO; plastic (SOT109-1)

( ): Package Designator North America

Guaranteed fan-out in common logic families

	DRIVEN ELEMENT	GUARANTEED
		FAN-OUT
	standard TTL	2
	74 LS	9
	74 L	16

Fig.3 Logic diagram (one gate).

APPLICATION INFORMATION

Some examples of applications for the HEF4049B are:

∙LOCMOS to DTL/TTL converter

∙HIGH sink current for driving 2 TTL loads

∙HIGH-to-LOW level logic conversion

Input protection

Fig.4 Input protection circuit that allows input voltages in excess of VDD.

Fig.2 Pinning diagram.

FAMILY DATA, IDD LIMITS category BUFFERS

See Family Specifications

January 1995

2