INTEGRATED CIRCUITS
DATA SHEET
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
HEF4543B MSI
BCD to 7-segment latch/decoder/driver
Product specification |
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January 1995 |
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File under Integrated Circuits, IC04 |
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Philips Semiconductors |
Product specification |
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BCD to 7-segment latch/decoder/driver
HEF4543B
MSI
DESCRIPTION
The HEF4543B is a BCD to 7-segment latch/decoder/driver for liquid crystal and LED displays. It has four address inputs (DA to DD), an active HIGH latch disable input (LD), an active HIGH blanking input (BI), an active HIGH phase input (PH) and seven buffered segment outputs (Oa to Og).
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Fig.1 Functional diagram. |
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PINNING |
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DA to DD |
address (data) inputs |
PH |
phase input (active HIGH) |
BI |
blanking input (active HIGH) |
LD |
latch disable input (active HIGH) |
Oa to Og |
segment outputs |
The circuit provides the function of a 4-bit storage latch and an 8-4-2-1 BCD to 7-segment decoder/driver. It can invert the logic levels of the output combination. The phase (PH), blanking (BI) and latch disable (LD) inputs are used to reverse the function table phase, blank the display and store a BCD code, respectively.
For liquid crystal displays a square-wave is applied to PH and the electrical common back-plane of the display. The outputs of the device are directly connected to the segments of the liquid crystal.
Fig.2 Pinning diagram.
HEF4543BP(N): 16-lead DIL; plastic (SOT38-1)
HEF4543BD(F): 16-lead DIL; ceramic (cerdip) ( SOT74)
HEF4543BT(D): 16-lead SO; plastic (SOT109-1)
( ): Package Designator North America
Fig.3 Segment designation.
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications
January 1995 |
2 |
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1995 January
3
Fig.4 Logic diagram.
latch/decoder/driver segment-7 to BCD
HEF4543B MSI
Semiconductors Philips
specification Product
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