16段数码管驱动及键盘控制芯片

CH454 是数码管显示驱动和键盘扫描控制芯片。CH454内置时钟振荡电路，可以动态驱动8 只16段的数码管或者128 只LED，支持11 段、14 段、16 段×8 以及17 段×7 等；同时还可以进行64 键的键盘扫描；CH454通过2 线串行接口与单片机等交换数据。 2.1. 显示驱动• 内置电流驱动级，段电流不小于20mA，字电流不小于150mA。\n• 动态显示扫描控制，直接驱动8 位16 段的数码管或者128 只发光管LED。\n• 各数码管的数字独立闪烁控制，可选快慢两种闪烁速度。\n• 通过占空比设定提供16 级亮度控制。\n• 部分段位寻址，独立控制前64个LED 或者各数码管的前8 个段的亮与灭。\n• 扫描极限控制，支持1 到8 个数码管，只为有效数码管分配扫描时间。\n• 可以选择字驱动输出极性，便于外部扩展驱动电压和电流。\n2.2. 键盘控制• 内置64 键键盘控制器，基于8×8 矩阵键盘扫描。\n• 内置按键状态输入的下拉电阻，内置;

16 - section digital tube drive and keyboard control chip

文件：215.61 Kbytes Page：12 Pages

16 - section digital tube drive and keyboard control chip

文件：215.61 Kbytes Page：12 Pages

16 - section digital tube drive and keyboard control chip

文件：215.61 Kbytes Page：12 Pages

RF POWER TRANSISTOR NPN SILICON

The RF Line NPN Silicon RF Power Transistor Designed for power amplifier applications in industrial, commercial and amateur radio equipment to 30 MHz. • Specified 12.5 Volt, 30 MHz Characteristics — Output Power = 80 Watts Minimum Gain = 12 dB Efficiency = 50

P-Channel Enhancement Mode Field Effect Transistor

General Description Power SOT P-Channel enhancement mode power field effect transistors are produced using Fairchilds proprietary, high cell density, DMOS technology. This very high density process is especially tailored to minimize on-state resistance and provide superior switching performance.

P-Channel Enhancement Mode Field Effect Transistor

General Description Power SOT P-Channel enhancement mode power field effect transistors are produced using Fairchilds proprietary, high cell density, DMOS technology. This very high density process is especially tailored to minimize on-state resistance and provide superior switching performance.

SURFACE MOUNT SILICON ZENER DIODES

VZ : 2.7 - 200 Volts PD : 2 Watts FEATURES : * Complete Voltage Range 2.7 to 200 Volts * High peak reverse power dissipation * High reliability * Low leakage current * Pb / RoHS Free

NPN SILICON PLANAR MEDIUM POWER TRANSISTORS

FEATURES * 140 Volt VCEO * 1 Amp continuous current * Ptot= 1 Watt