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

• Wide supply voltage range from 3.0 V to 15.0 V

• CMOS low power dissipation

• High noise immunity

• Fully static operation

• 5 V, 10 V, and 15 V parametric ratings

• Standardized symmetrical output characteristics

• Complies with JEDEC standard JESD 13-B

• ESD protection:

• HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-B exceeds 200 V

• Specified from -40 °C to +85 °C

HEF4543BT属于集成电路（IC） > 显示驱动器。安世半导体(中国)有限公司制造生产的HEF4543BT显示驱动器显示驱动器是一种集成电路 (IC)，可在微处理器 (MPU)、微控制器 (MCU) 或其他电路系统之间提供转换、接口和控制，用于 LCD、LED、OLED、DLP、真空荧光和 AMOLED 等显示器。可能的通信接口和协议包括模拟、BCD、I2C、并行、串行、SMBus、SPI 和 QSPI。