HEC4049BDB 데이터 시트보기 (PDF) - Philips Electronics

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HEC4049BDB

HEX inverting buffers

Philips Electronics 

Philips Semiconductors

HEX inverting buffers

Product specification

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.

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

standard TTL

74 LS

74 L

GUARANTEED

FAN-OUT

2

9

16

Fig.1 Functional diagram.

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.2 Pinning diagram.

January 1995

Fig.4 Input protection circuit that allows input

voltages in excess of VDD.

FAMILY DATA, IDD LIMITS category BUFFERS

See Family Specifications

2

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