HEF4511B Datasheet | Philips Semiconductors

DESCRIPTION The HEF4511B is a BCD to 7-segment latch/decoder/driver with four address inputs (DA to 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 (Oa to Og). When EL is LOW, the state of the segment outputs (Oa to Og) is determined by the data on DA to DD. When EL goes HIGH, the last data present on DA to DD are 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. Fig.2 Pinning 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 DA to DD EL BI LT Oa to Og address (data) inputs latch enable input (active LOW) ripple blanking input (active LOW) lamp test input (active LOW) segment outputs Fig.4 Segment designation. Fig.3 Schematic diagram of output stage. January 1995 FAMILY DATA, IDD LIMITS category MSI See Family Specifications Philips Semiconductors BCD to 7-segment latch/decoder/driver January 1995 This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in _white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ... Fig.5 Logic diagram; for one latch see Fig.6. Product specification HEF4511B MSI Philips Semiconductors BCD to 7-segment latch/decoder/driver Product specification HEF4511B MSI Fig.6 Logic diagram...