WMSIC Electronic Components

HOLTEK HT16K33A-28SOP HT16K33A

ModelHT16K33A-28SOP
PackageSOP-28
BrandHOLTEK
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

16 specifications

Core information

Product name
HOLTEK(Holtek / Holtek) HT16K33A-28SOP
Type
HOLTEK
Minimum package
27 未知

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HOLTEK(Holtek / Holtek)
Electronic Component
HT16K33A-28SOP
Electronic Component
1
Package
SOP-28
Electronic Component
LEDDriver
Electronic Component
1.325g
Electronic Component
1
Channel Count
1
Electronic Component
BM0229972617
Operating Temperature
40℃~+85℃
Electronic Component
Electronic Component
Electronic Component
27

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

HT16K33A-28SOP 产品概述

一、产品简介

HT16K33A-28SOP 是台湾 HOLTEK(合泰/盛群)推出的一款用于 LED 显示与键盘扫描的专用驱动芯片,封装为 SOP-28,工作温度范围 -40℃ 到 +85℃。该器件以 I²C/两线串行接口为主,面向点阵、7 段/多段 LED 显示以及带键盘输入的交互面板设计,适合对显示与按键采集有集中控制需求的终端设备。

二、主要特性

  1. I²C 兼容串行接口,便于与主控 MCU 快速集成,支持多芯片扩展。
  2. 内置显示缓冲 RAM,可直接写入显示数据,实现动态刷新与闪烁控制。
  3. 集成键盘扫描功能,减少主控端轮询负担,适用于矩阵键盘或按键矩阵扩展。
  4. 恒流 LED 驱动架构,输出为恒流 sink 型,可通过外部 Rext 设定参考电流,保证亮度一致性。
  5. 可编程亮度控制与闪烁/消隐功能,便于实现省电与视觉效果管理。
  6. 低功耗设计,适配 3.3V/5V 系统电源(实际供电与接口电平请以原厂手册和应用电路为准)。

三、封装与引脚要点

HT16K33A 采用 SOP-28 封装,常见引脚包括电源(VDD/VSS)、I²C 信号(SDA/SCL)、显示输出列/段、公共驱动引脚、外部参考电阻(Rext)引脚及中断/键盘中断输出等。布线时需注意电源去耦、SDA/SCL 拉电阻选择与 LED 排线走向,以降低噪声与串扰。

四、典型应用场景

适用于消费电子面板、便携式设备显示、智能家电指示、仪表盘、办公设备状态指示及各类需要矩阵显示并带按键输入的嵌入式系统。对于须扩展更多显示点或按键数目的系统,可在 I²C 总线上并联多个驱动芯片(需配置地址)。

五、设计注意事项与建议

  1. I²C 线需外接上拉电阻,常用 4.7k–10kΩ,根据系统电源与总线长度调整。
  2. 在 VDD 近旁放置 0.1µF 陶瓷去耦电容,确保电源稳健。
  3. Rext 用于设定输出电流,选择前应计算 LED 工作电压与期望亮度,避免超出器件和 LED 的热限制。
  4. 布局时将高电流 LED 回路与微弱信号线分离,优化散热路径,必要时评估 PCB 铜厚与散热通道。
  5. 若同时使用键盘扫描功能,注意消抖与扫描速率设置以避免误触与干扰。

六、验证与常见排查项

在原型验证阶段,应重点观察:显示刷新是否稳定、亮度一致性、I²C 通信错误及键盘误检问题。若出现通信不稳定,优先检查拉电阻值、总线占空与接地完整性;若亮度或驱动异常,核对 Rext 选型与输出走线。

结语:HT16K33A-28SOP 在小型显示与键盘输入集中控制方面具有良好集成度与工程便利性。欲获得详细电气参数、引脚定义与指令集,请参考 HOLTEK 官方数据手册与应用笔记,以便在产品开发中做到参数匹配与可靠性验证。

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