HEF4543BP

HEF4543B BCD to 7-segment latch/decoder/driver Rev. 6 17 November 2011 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 V power supply range of 3 V to 15 V referenced to V DD SS (usually ground). Unused inputs must be connected to V , V , or another input. DD SS 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 Version HEF4543BP DIP16 plastic dual in-line package 16-leads (300 mil) SOT38-4 HEF4543BT SO16 plastic small outline package 16 leads body width 3.9 mm SOT109-1HEF4543B NXP Semiconductors BCD to 7-segment latch/decoder/driver 4. Functional diagram 5 3 2 4 D0 D1 D2 D3 1 LE LATCHES 7 BL DECODER 6 PH DRIVERS Qg Qf Qe Qd Qc Qb Qa 14 15 13 12 11 10 9 001aae742 Fig 1. Functional diagram HEF4543B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 6 17 November 2011 2 of 17