BCD to 7-segment latch/decoder/driver
Description
HEF4543B
BCD to 7-segment latch/decoder/driver
Rev.
7 — 1 April 2016
Product data sheet
1.
General description
The HEF4543B is a BCD to 7-segment latch/decoder/driver for liquid crystal and LED displays.
It has four address inputs (D0 to D3), an active LOW latch enable input (LE), an active HIGH blanking input (BL), an active HIGH phase input (PH) and seven buffered segment outputs (Qa to Qg).
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 (BL) and latch enable (LE) 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.
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground).
Unused inputs must be connected to VDD, VSS, or another input.
2.
Features and benefits
Fully static operation 5 V, 10 V, and 15 V parametric ratings Standardized symmetrical output characteristics Specified from 40 C to +85 C Complies with JEDEC standard JESD 13-B
3.
Ordering information
Table 1.
Ordering information All types operate from 40 C to +85 C
Type number
Package
Name
Description
HEF4543BT
SO16
plastic small outline package; 16 leads; body width 3.
9 mm
Version SOT109-1
NXP Semiconductors
4.
Functional diagram
HEF4543B
BCD to 7-segment latch/decoder/driver
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Fig 1.
Functional diagram
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HEF4543B
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev.
7 — 1 April 2016
© NXP Semiconductors N.
V.
2016.
All rights reserved.
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NXP Semiconductors
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