Philips HEF4511B User Manual

INTEGRATED CIRCUITS

DATA SH EET

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

HEF4511B
MSI

BCD to 7-segment
latch/decoder/driver

Product specification
File under Integrated Circuits, IC04

January 1995

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

DESCRIPTION

The HEF4511B is a BCD to 7-segment
latch/decoder/driver with four address inputs (DAto DD),
an active LOW latch enable input (EL), an active LOW
ripple blanking input (BI), an active LOW lamp test input
(LT), and seven active HIGH n-p-n bipolar transistor
segment outputs (Oato Og).

HEF4511B

MSI

EL is LOW, the state of the segment outputs (Oato

When
Og) is determined by the data on DAto DD.
When EL goes HIGH, the last data present on DAto
DDare stored in the latches and the segment outputs
remain stable. When LT is LOW, all the segment outputs
are HIGH independent of all other input conditions. With
LT HIGH, a LOW on BI forces all segment outputs LOW.
The inputs LT and BI do not affect the latch circuit.

Fig.2 Pinning diagram.

Fig.1 Functional diagram.

HEF4511BP(N): 16-lead DIL; plastic (SOT38-1)
HEF4511BD(F): 16-lead DIL; ceramic (cerdip) (SOT74)
HEF4511BT(D): 16-lead SO; plastic (SOT109-1)
( ): Package Designator North America

PINNING

D

to D

A

D

EL latch enable input (active LOW)
BI ripple blanking input (active LOW)
LT lamp test input (active LOW)
O

to O

a

g

Fig.4 Segment

address (data) inputs

segment outputs

designation.

Fig.3 Schematic diagram of output stage.

January 1995 2

FAMILY DATA, IDDLIMITS category MSI

See Family Specifications

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January 1995 3

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

Fig.5 Logic diagram; for one latch see Fig.6.

HEF4511B

MSI

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

Fig.6 Logic diagram (one latch); see also Fig.5.

FUNCTION TABLE

INPUTS OUTPUTS

HEF4511B

MSI

EL BI LTDDDCDBDAOaObOcOdOeOfOgDISPLAY

XXLXXXXHH HHHHH 8
X L H X X X X L L L L L L L blank

LHHL L L LHHHHHHL 0
LHHLLLHLHHLLLL 1
LHHLLHLHHLHHLH 2
LHHL L H H H H H H L L H 3
LHHLHLLLHHLLHH 4
LHHLHLHHLHHLHH 5
LHHLHH LL L HHHHH 6
LHHLHHHHHHLLLL 7
LHHHL L LHH HHHHH 8
LHHH L L H H H H L L HH 9
L H H H L H L L L L L L L L blank
L H H H L H H L L L L L L L blank
L H H H H L L L L L L L L L blank
L H H H H L H L L L L L L L blank
L H H H H H L L L L L L L L blank
L H H H H H H L L L L L L L blank

HHHX X X X * *

Note

1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
* Depends upon the BCD code applied during the LOW to HIGH transition of

January 1995 4

EL.