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FD620K1
1.
集成电路 FD620K1
LED驱动控制/键盘扫描专用集成电路FD620K1 一、概述 FD620K1是一种带键盘扫描电路接口的LED驱动控制专用电路。内部集成有MCU 输入输出控制数字接口、数据锁存器、LED驱动、键盘扫描、辉度调节等电路。本芯 片性能稳定、质量可靠、抗干扰能力强,可适应于24小时长期连续工作的应用场合。 二、特性说明 • 采用功率CMOS工艺 • 显示模式:7段×5位,或8段×4位 • 键扫描:7×1bit • 辉度调节电路(占空比8级可调) • 三线式串行接口(CLK,STB,DI/O) • 振荡方式:内置RC振荡 (频率为450KHz±5%) • 内置上电复位电路 • 供电电源:支持3V-5.5V电源电压,典型值3.3V • 采用DIP18封装 三、管脚定义
2.
集成电路 FD620K1 四、管脚功能说明
符号 管脚名称 说明 DIG1~ 位输出 用于驱动LED位。 DIG4 DIO 数据输入/输出 在时钟上升沿输入串行数据,从低位开始;在时钟下降沿输出 串行数据,从低位开始。输出为N-沟道开漏。 CLK 时钟输入 在上升沿读取输入数据,下降沿读取输出数据 STB 片选 在上升或下降沿初始化串行接口,随后等待接收指令。STB 为低后的第一个字节作为指令,当处理指令时,当前其它处 理被终止。当STB为高时,CLK被忽略。 KI 键扫数据输入 输入该脚的数据在显示周期结束后被锁存 A/KO1~ 段/键扫描输出 LED段输出,也用作键扫描输出 G/KO7 P/DIG5 段/位输出 LED段输出,也可用作位输出 VDD 逻辑电源 3-5.5V GND 逻辑地 接地 五、主要电气参数 极限参数(Ta = 25℃, Vss = 0 V) 参数 符号 范围 单位 电源电压 VDD -0.5 ~ +7.0 V 输入电压 VI1 -0.5 ~ VDD + 0.5 V LED 段驱动输出电流 IO1 -50 mA LED 位驱动输出电流 IO2 +200 mA 功率损耗 PD 400 mW 工作温度 Topt -40 ~ +80 ℃ 储存温度 Tstg -65 ~ +150 ℃
3.
集成电路 FD620K1
电气特性(Ta = -20~+70℃,VDD =3~5.5V,Vss = 0 V) 参数 符号 最小 典型 最大 单位 电源电压 VDD 3 3.3 5.5 V 高电平输入电压 VIH 0.7 VDD - VDD V 低电平输入电压 VIL 0 - 0.3 VDD V 高电平输出电流 IOH2 -20 -30 -50 mA 低电平输出电流 IOL1 80 140 - mA 低电平输出电流 Idout 4 - - mA 输出下拉电阻 RL 50 100 150 KΩ 输入电流 Ii - - ±1 μA 高电平输入电压 VIH 0.7 VDD - - V 低电平输入电压 VIL - - 0.3 VDD V 开关特性(Ta = -20 ~ +70℃,VDD = 3 ~ 5.5 V) 参数 符号 最小 典型 最大 单位 振荡频率 Fosc - 450 - KHz 传输延迟时间 TP - - 300 ns 上升时间 TTZH1 - - 2 μs 下降时间 TTZH2 - - 120 μs 最大时钟频率 Fmax 1 - - KHz 输入电容 CI - - 15 pF 时序特性(Ta = -20 ~ +70℃,VDD = 3 ~ 5.5 V) 参数 符号 最小 典型 最大 单位 时钟脉冲宽度 PWCLKc 400- - - ns 选通脉冲宽度 PWSTB 1 - - μs 数据建立时间 Tsetup 100 - - ns 数据保持时间 Thold 100 - - ns CLK→STB时间 Tclk-stb 1 - - μs 等待时间 Twait 1 - - μs
4.
集成电路 FD620K1 六、FD620K1尺寸(DIP)
5.
集成电路 FD620K1 七、应用电路 (一)
四位数码管应用电路
6.
集成电路 FD620K1 (二)
简易三位数码管应用电路 公司名称:福州福大海矽微电子有限公司 地 址:福州市鼓楼区软件大道 89 号福州软件园 A 区 31 号楼 (福建省集成电路研究中心三层 C 区) 电 话:87986710 87986713 传真:87986712 网 址:http://www.fdhisi.com
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