HEX inverting buffers
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
Fig.1 Functional diagram.
Fig.3 Logic diagram (one gate).
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
Fig.2 Pinning diagram.
Fig.4 Input protection circuit that allows input
voltages in excess of VDD.
FAMILY DATA, IDD LIMITS category BUFFERS
See Family Specifications