74HC595的输出能力 74hc595是干什么的
74HC595\u8f93\u51fa\u9ad8\u7535\u5e73\u548c\u4f4e\u7535\u5e73\u65f6\u7535\u6d41\u5206\u522b\u591a\u5927\u4e9a\uff1f595 20mA\u6ca1\u6709\u95ee\u9898\u7684\uff0cCMOS\u7535\u8def\u9a71\u52a8\u80fd\u529b\u8fd8\u53ef\u4ee5\u3002
\u63a5\u5355\u7247\u673a\u7684\u8bdd\u5176\u5b9e1mA\u90fd\u8db3\u591f\u4e86\uff0c\u5355\u7247\u673a\u7684IO\u53e3\u7528\u4f5c\u8f93\u5165\u7684\u8bdd\u7b49\u6548\u963b\u6297\u662f\u5f88\u5927\u7684\u3002
\u5982\u679c\u9a71\u52a8595\u4e00\u5757\u5355\u7247\u673a\u53ef\u4ee5\u9a71\u52a8100\u5757\u4ee5\u4e0a\u7684595\uff08595\u4e32\u8054\u65b9\u5f0f\uff09
\u5b83\u7684\u8f93\u51fa\u7535\u538b\u5c31\u662f\u4f60\u7ed9\u5b83\u7684\u7535\u6e90\u7535\u538b\uff0c\u6700\u597d\u4e0d\u8981\u8d85\u8fc79V\uff0c\u901a\u5e38\u6807\u51c6\u7684\u7535\u538b\u662f5V\uff0c\u5355\u7247\u673a\u548c\u5b83\u901a\u4fe1\u7684\u7535\u5e73\u4e5f\u662f5V\uff0c\u5b9e\u9645\u4e0a\u7ed9\u5b83\u8d85\u8fc72.5V\u7684\u7535\u538b\u5b83\u5c31\u8ba4\u4e3a\u662f\u9ad8\u7535\u5e73\u4e86\u3002
74HC595\u662f\u7845\u7ed3\u6784\u7684CMOS\u5668\u4ef6\uff0c \u517c\u5bb9\u4f4e\u7535\u538bTTL\u7535\u8def\uff0c\u9075\u5b88JEDEC\u6807\u51c6\u3002 74HC595\u662f\u5177\u67098\u4f4d\u79fb\u4f4d\u5bc4\u5b58\u5668\u548c\u4e00\u4e2a\u5b58\u50a8\u5668\uff0c\u4e09\u6001\u8f93\u51fa\u529f\u80fd\u3002 \u79fb\u4f4d\u5bc4\u5b58\u5668\u548c\u5b58\u50a8\u5668\u662f\u5206\u522b\u7684\u65f6\u949f\u3002 \u6570\u636e\u5728SCHcp\u7684\u4e0a\u5347\u6cbf\u8f93\u5165\uff0c\u5728STcp\u7684\u4e0a\u5347\u6cbf\u8fdb\u5165\u7684\u5b58\u50a8\u5bc4\u5b58\u5668\u4e2d\u53bb\u3002\u5982\u679c\u4e24\u4e2a\u65f6\u949f\u8fde\u5728\u4e00\u8d77\uff0c\u5219\u79fb\u4f4d\u5bc4\u5b58\u5668\u603b\u662f\u6bd4\u5b58\u50a8\u5bc4\u5b58\u5668\u65e9\u4e00\u4e2a\u8109\u51b2\u3002 \u79fb\u4f4d\u5bc4\u5b58\u5668\u6709\u4e00\u4e2a\u4e32\u884c\u79fb\u4f4d\u8f93\u5165\uff08Ds\uff09\uff0c\u548c\u4e00\u4e2a\u4e32\u884c\u8f93\u51fa\uff08Q7\u2019\uff09,\u548c\u4e00\u4e2a\u5f02\u6b65\u7684\u4f4e\u7535\u5e73\u590d\u4f4d\uff0c\u5b58\u50a8\u5bc4\u5b58\u5668\u6709\u4e00\u4e2a\u5e76\u884c8\u4f4d\u7684\uff0c\u5177\u5907\u4e09\u6001\u7684\u603b\u7ebf\u8f93\u51fa\uff0c\u5f53\u4f7f\u80fdOE\u65f6\uff08\u4e3a\u4f4e\u7535\u5e73\uff09\uff0c\u5b58\u50a8\u5bc4\u5b58\u5668\u7684\u6570\u636e\u8f93\u51fa\u5230\u603b\u7ebf\u3002
8\u4f4d\u4e32\u884c\u8f93\u5165/\u8f93\u51fa\u6216\u8005\u5e76\u884c\u8f93\u51fa\u79fb\u4f4d\u5bc4\u5b58\u5668\uff0c\u5177\u6709\u9ad8\u963b\u5173\u65ad\u72b6\u6001\u3002\u4e09\u6001\u3002
[\u7f16\u8f91\u672c\u6bb5]\u7279\u70b9
8\u4f4d\u4e32\u884c\u8f93\u5165 /8\u4f4d\u4e32\u884c\u6216\u5e76\u884c\u8f93\u51fa \u5b58\u50a8\u72b6\u6001\u5bc4\u5b58\u5668\uff0c\u4e09\u79cd\u72b6\u6001
\u8f93\u51fa\u5bc4\u5b58\u5668\u53ef\u4ee5\u76f4\u63a5\u6e05\u9664 100MHz\u7684\u79fb\u4f4d\u9891\u7387
[\u7f16\u8f91\u672c\u6bb5]\u8f93\u51fa\u80fd\u529b
\u5e76\u884c\u8f93\u51fa\uff0c\u603b\u7ebf\u9a71\u52a8\uff1b \u4e32\u884c\u8f93\u51fa\uff1b\u6807\u51c6\u4e2d\u7b49\u89c4\u6a21\u96c6\u6210\u7535\u8def
595\u79fb\u4f4d\u5bc4\u5b58\u5668\u6709\u4e00\u4e2a\u4e32\u884c\u79fb\u4f4d\u8f93\u5165\uff08Ds\uff09\uff0c\u548c\u4e00\u4e2a\u4e32\u884c\u8f93\u51fa\uff08Q7\u2019\uff09,\u548c\u4e00\u4e2a\u5f02\u6b65\u7684\u4f4e\u7535\u5e73\u590d\u4f4d\uff0c\u5b58\u50a8\u5bc4\u5b58\u5668\u6709\u4e00\u4e2a\u5e76\u884c8\u4f4d\u7684\uff0c\u5177\u5907\u4e09\u6001\u7684\u603b\u7ebf\u8f93\u51fa\uff0c\u5f53\u4f7f\u80fdOE\u65f6\uff08\u4e3a\u4f4e\u7535\u5e73\uff09\uff0c\u5b58\u50a8\u5bc4\u5b58\u5668\u7684\u6570\u636e\u8f93\u51fa\u5230\u603b\u7ebf\u3002
[\u7f16\u8f91\u672c\u6bb5]\u53c2\u8003\u6570\u636e
CPD\u51b3\u5b9a\u52a8\u6001\u7684\u80fd\u8017\uff0c
PD\uff1dCPD\u00d7VCC\u00d7f1+\u2211(CL\u00d7VCC2\u00d7f0)
F1\uff1d\u8f93\u5165\u9891\u7387\uff0cCL\uff1d\u8f93\u51fa\u7535\u5bb9 f0\uff1d\u8f93\u51fa\u9891\u7387\uff08MHz\uff09 Vcc=\u7535\u6e90\u7535\u538b
[\u7f16\u8f91\u672c\u6bb5]\u5f15\u811a\u8bf4\u660e
\u7b26\u53f7 \u5f15\u811a \u63cf\u8ff0
Q0\u2026Q7 15\uff0c 1\uff0c 7 \u5e76\u884c\u6570\u636e\u8f93\u51fa
GND 8 \u5730
Q7\u2019 9 \u4e32\u884c\u6570\u636e\u8f93\u51fa
MR 10 \u4e3b\u590d\u4f4d\uff08\u4f4e\u7535\u5e73\uff09
SHCP 11 \u79fb\u4f4d\u5bc4\u5b58\u5668\u65f6\u949f\u8f93\u5165
STCP 12 \u5b58\u50a8\u5bc4\u5b58\u5668\u65f6\u949f\u8f93\u5165
OE 13 \u8f93\u51fa\u6709\u6548\uff08\u4f4e\u7535\u5e73\uff09
DS 14 \u4e32\u884c\u6570\u636e\u8f93\u5165
VCC 16 \u7535\u6e90
[\u7f16\u8f91\u672c\u6bb5]\u529f\u80fd\u8868
\u8f93\u5165 \u8f93\u51fa \u529f\u80fd
SHCP STCP OE MR DS Q7\u2019 Qn
\u00d7 \u00d7 L \u2193 \u00d7 L NC MR\u4e3a\u4f4e\u7535\u5e73\u65f6\u4ec5\u4ec5\u5f71\u54cd\u79fb\u4f4d\u5bc4\u5b58\u5668
\u00d7 \u2191 L L \u00d7 L L \u7a7a\u79fb\u4f4d\u5bc4\u5b58\u5668\u5230\u8f93\u51fa\u5bc4\u5b58\u5668
\u00d7 \u00d7 H L \u00d7 L Z \u6e05\u7a7a\u79fb\u4f4d\u5bc4\u5b58\u5668\uff0c\u5e76\u884c\u8f93\u51fa\u4e3a\u9ad8\u963b\u72b6\u6001
\u2191 \u00d7 L H H Q6 NC \u903b\u8f91\u9ad8\u7535\u5e73\u79fb\u5165\u79fb\u4f4d\u5bc4\u5b58\u5668\u72b6\u60010\uff0c\u5305\u542b\u6240\u6709\u7684\u79fb\u4f4d\u5bc4\u5b58\u5668\u72b6\u6001 \u79fb\u5165\uff0c\u4f8b\u5982\uff0c\u4ee5\u524d\u7684\u72b6\u60016\uff08\u5185\u90e8Q6\u201d\uff09\u51fa\u73b0\u5728\u4e32\u884c\u8f93\u51fa\u4f4d\u3002
\u00d7 \u2191 L H \u00d7 NC Qn\u2019 \u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u5185\u5bb9\u5230\u8fbe\u4fdd\u6301\u5bc4\u5b58\u5668\u5e76\u4ece\u5e76\u53e3\u8f93\u51fa
\u2191 \u2191 L H \u00d7 Q6\u2019Qn\u2019 \u79fb\u4f4d\u5bc4\u5b58\u5668\u5185\u5bb9\u79fb\u5165\uff0c\u5148\u524d\u7684\u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u5185\u5bb9\u5230\u8fbe\u4fdd\u6301\u5bc4\u5b58\u5668\u5e76\u51fa\u3002
[\u7f16\u8f91\u672c\u6bb5]\u6ce8\u91ca
H\uff1d\u9ad8\u7535\u5e73\u72b6\u6001
L\uff1d\u4f4e\u7535\u5e73\u72b6\u6001
\u2191\uff1d\u4e0a\u5347\u6cbf
\u2193\uff1d\u4e0b\u964d\u6cbf
Z\uff1d\u9ad8\u963b
NC\uff1d\u65e0\u53d8\u5316
\u00d7\uff1d\u65e0\u6548
\u5f53MR\u4e3a\u9ad8\u7535\u5e73\uff0cOE\u4e3a\u4f4e\u7535\u5e73\u65f6\uff0c\u6570\u636e\u5728SHCP\u4e0a\u5347\u6cbf\u8fdb\u5165\u79fb\u4f4d\u5bc4\u5b58\u5668\uff0c\u5728STCP\u4e0a\u5347\u6cbf\u8f93\u51fa\u5230\u5e76\u884c\u7aef\u53e3\u3002
并行输出，总线驱动； 串行输入；标准中等规模集成电路
595移位寄存器有一个串行移位输入（Ds），和一个串行输出（Q7’）,和一个异步的低电平复位，存储寄存器有一个并行8位的，具备三态的总线输出，当使能OE时（为低电平），存储寄存器的数据输出到总线。
参考数据
Cpd决定动态的能耗，
Pd=Cpd×VCC×f1+∑(CL×VCC^2×f0)
F1=输入频率，CL=输出电容 f0=输出频率（MHz） Vcc=电源电压
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绛旓細74HC595鏄叿鏈8浣嶇Щ浣嶅瘎瀛樺櫒鍜屼竴涓瓨鍌ㄥ櫒锛屼笁鎬佽緭鍑哄姛鑳銆 绉讳綅瀵勫瓨鍣ㄥ拰瀛樺偍鍣ㄦ槸鍒嗗埆鐨勬椂閽熴 鏁版嵁鍦⊿CHcp鐨勪笂鍗囨部杈撳叆锛屽湪STcp鐨勪笂鍗囨部杩涘叆鐨勫瓨鍌ㄥ瘎瀛樺櫒涓幓銆傚鏋滀袱涓椂閽熻繛鍦ㄤ竴璧凤紝鍒欑Щ浣嶅瘎瀛樺櫒鎬绘槸姣斿瓨鍌ㄥ瘎瀛樺櫒鏃╀竴涓剦鍐层 绉讳綅瀵勫瓨鍣ㄦ湁涓涓覆琛岀Щ浣嶈緭鍏ワ紙Ds锛夛紝鍜屼竴涓覆琛岃緭鍑猴紙Q7鈥欙級,鍜屼竴涓紓姝...
绛旓細595 20mA娌℃湁闂鐨勶紝CMOS鐢佃矾椹卞姩鑳藉姏杩樺彲浠銆傛帴鍗曠墖鏈虹殑璇濆叾瀹1mA閮借冻澶熶簡锛屽崟鐗囨満鐨処O鍙ｇ敤浣滆緭鍏ョ殑璇濈瓑鏁堥樆鎶楁槸寰堝ぇ鐨勩傚鏋滈┍鍔595涓鍧楀崟鐗囨満鍙互椹卞姩100鍧椾互涓婄殑595锛595涓茶仈鏂瑰紡锛夊畠鐨勮緭鍑虹數鍘嬪氨鏄綘缁欏畠鐨勭數婧愮數鍘嬶紝鏈濂戒笉瑕佽秴杩9V锛岄氬父鏍囧噯鐨勭數鍘嬫槸5V锛屽崟鐗囨満鍜屽畠閫氫俊鐨勭數骞充篃鏄5V锛屽疄闄呬笂缁欏畠...
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绛旓細74HC595鏄竴涓父鐢ㄧ殑绉讳綅瀵勫瓨鍣ㄨ姱鐗囷紝瀹冨叿鏈夊绉嶅姛鑳戒互瀹炵幇鏁版嵁鐨勪綅绉诲拰浼犺緭銆傝緭鍏ョ鍙ｅ寘鎷細SHCP: 鐢ㄤ簬鍚姩绉讳綅鑴夊啿锛屽綋缃綆鏃讹紝鏁版嵁寮濮嬩粠骞惰杈撳叆绉诲叆绉讳綅瀵勫瓨鍣ㄣ係TCP: 涓茶鏁版嵁杈撳叆鎺у埗锛岀疆浣庢椂锛屾暟鎹氳繃D7鍒癉0渚濇绉诲叆銆侽E: 杈撳嚭浣胯兘锛屽綋缃珮鏃讹紝鍏佽鏁版嵁浠庣Щ浣嶅瘎瀛樺櫒杈撳嚭鍒板苟琛岃緭鍑虹鍙ｃ侻R: 绉讳綅...
绛旓細涓ょ墖74HC595纭疄鍙互椹卞姩涓涓8X8鐨凩ED鐐归樀銆侺ED鐨勯瀹氱數娴佹槸10mA锛屽彲瀹為檯鐢垫祦骞朵笉闇瑕佷竴瀹氳杈惧埌棰濆畾鐢垫祦鍟婏紝棰濆畾涓嶇瓑浜庡疄闄呯殑銆傝繖瑕佺湅闄愭祦鐢甸樆鏄澶с傜幇鍦↙ED鐐归樀閮介珮浜害鐨勶紝鐢垫祦杈惧埌3mA鏃讹紝灏卞緢浜簡锛屾墍浠ワ紝涓嶉渶瑕佺湡鍒10mA鐨勩備互闄愭祦鐢甸樆鏄510娈磋绠楋紝鐢垫祦鏄6mA锛8涓悓鏃朵寒鏄48mA銆74HC595鐨勮緭鍑...
绛旓細涓句竴涓疄闄呭伐绋嬩腑浣跨敤鐨勮姱鐗囧瀷鍙凤細74HC595鏄竴绉8浣嶇Щ浣嶅瘎瀛樺櫒锛屽彲浠ラ氳繃涓茶杈撳叆鏂瑰紡灏嗘暟鎹瓨鍌ㄥ湪瀵勫瓨鍣ㄤ腑锛屽苟閫氳繃骞惰杈撳嚭鏂瑰紡灏嗘暟鎹紶杈撳埌鍏朵粬鏁板瓧鐢佃矾涓傚畠鍙互瀹炵幇澶氫釜LED鐏殑鎺у埗銆佹暟鐮佺鐨勬樉绀恒佺户鐢靛櫒鐨勬帶鍒剁瓑搴旂敤銆傚湪瀹為檯宸ョ▼涓紝74HC595甯哥敤浜嶭ED鐐归樀鎺у埗鍣ㄣ佹暟瀛楁椂閽熴佹暟瀛楁俯搴﹁绛夋暟瀛楃數璺璁′腑銆
绛旓細杩欐牱杈撳嚭鐢垫祦涓鑸兘杈惧埌20ma锛屽彲浠ョ洿鎺ラ┍鍔↙ED鍙戝厜浜嗐傜户缁鍔犲弽鐩稿櫒鐨勮瘽锛屽彧鏈夋渶鍚庝竴涓敤浜庤緭鍑猴紝杈撳嚭鐨勮兘鍔杩樻槸20ma锛屼絾鏄娇鐢ㄧ殑鍙嶇浉鍣ㄥ澶氫簡锛屾墍浠ュ彧鑳藉澶у姛鑰楄屼笉浼氬鍔犻┍鍔ㄨ兘鍔涖傚鏋20ma杈撳嚭涓嶅鐨勮瘽锛屽彲浠ュ姞澶у姛鐜囩殑澶嶅悎涓夋瀬绠°丗ET鎴栬呮荤嚎椹卞姩鍣ㄦ潵澧炲ぇ椹卞姩鑳藉姏銆
绛旓細74HC595鏄疶TL鐢靛钩鐨勯昏緫鐢佃矾,杈撳嚭楂樼數骞虫椂鍊欓┍鍔鑳藉姏寰堝樊鐨,鎵浠ユ棤娉曞幓椹卞姩鍏遍槾鐨凩ED绠,鎺ュ叡闃矻ED鏃,鐢变簬鏄亴鐢垫祦,鎵浠ヨ兘鐐逛寒LED,浣嗘槸鐢垫祦涔熶笉鏄撹繃澶,濡傛灉鎯抽┍鍔ㄥ叡闃碙ED闇瑕佸姞椹卞姩鑺墖,璀ULN2003鎴朥LN2803
