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
File under Integrated Circuits, IC04
January 1995
Philips Semiconductors
Product specification
HEX inverting 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.
HEF4049B
buffers
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.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
Fig.1 Functional diagram.
•
HIGH-to-LOW level logic conversion
Input protection
Fig.4
Input protection circuit that allows input
voltages in excess of V
DD
.
Fig.2 Pinning diagram.
FAMILY DATA, I
DD
LIMITS category BUFFERS
See Family Specifications
January 1995
2
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