Philips HEF4511BU, HEF4511BT, HEF4511BPB, HEF4511BP, HEF4511BDB Datasheet

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DATA SH EET

Product speciﬁcation File under Integrated Circuits, IC04

January 1995

INTEGRATED CIRCUITS

HEF4511B MSI

BCD to 7-segment latch/decoder/driver

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

January 1995 2

Philips Semiconductors Product speciﬁcation

BCD to 7-segment latch/decoder/driver

HEF4511B

MSI

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).

When

EL is LOW, the state of the segment outputs (Oato 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.1 Functional diagram.

PINNING

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

to D

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

to O

segment outputs

Fig.2 Pinning diagram.

Fig.3 Schematic diagram of output stage.

FAMILY DATA, IDDLIMITS category MSI

See Family Specifications

Fig.4 Segment

designation.

January 1995 3

Philips Semiconductors Product speciﬁcation

BCD to 7-segment latch/decoder/driver

HEF4511B

MSI

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

January 1995 4

Philips Semiconductors Product speciﬁcation

BCD to 7-segment latch/decoder/driver

HEF4511B

MSI

FUNCTION TABLE

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

EL.

INPUTS OUTPUTS

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 * *

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

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