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HEF4515BN

1-of-16 decoder/demultiplexer with input latches

Philips Electronics 

Philips Semiconductors

1-of-16 decoder/demultiplexer with input latches

Product specification

HEF4515B

MSI

DESCRIPTION

The HEF4515B is a 1-of-16 decoder/demultiplexer, having

four binary weighted address inputs (A0 to A3), a latch

enable input (EL), and an active LOW enable input (E).

The 16 outputs (O0 to O15) are mutually exclusive active

LOW. When EL is HIGH, the selected output is determined

by the data on An. When EL goes LOW, the last data

present at An are stored in the latches and the outputs

remain stable. When E is LOW, the selected output,

determined by the contents of the latch, is LOW. At

E HIGH, all outputs are HIGH. The enable input (E) does

not affect the state of the latch. When the HEF4515B is

used as a demultiplexer, E is the data input and A0 to

A3 are the address inputs.

Fig.1 Functional diagram.

Fig.2 Pinning diagram.

PINNING

A0 to A3

E

EL

O0 to O15

address inputs

enable input (active LOW)

latch enable input

outputs (active LOW)

HEF4515BP(N): 24-lead DIL; plastic

(SOT101-1)

HEF4515BD(F): 24-lead DIL; ceramic (cerdip)

(SOT94)

HEF4515BT(D): 24-lead SO; plastic

(SOT137-1)

( ): Package Designator North America

APPLICATION INFORMATION

Some examples of applications for the HEF4515B are:

• Digital multiplexing.

• Address decoding.

• Hexadecimal/BCD decoding.

FAMILY DATA, IDD LIMITS category MSI

See Family Specifications

January 1995

2

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