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SN74HC21 鐨勪富瑕佺壒鎬у寘鎷�锛�
銆�銆�1. 楂橀�熸�ц兘锛氱敱浜庨噰鐢–MOS宸ヨ棟锛屽叾鍌虫挱寤堕伈鏅�(sh铆)闁撻潪甯哥煭锛岄仼鍚堥渶瑕佸揩閫熼熆鎳�(y墨ng)鐨勬噳(y墨ng)鐢ㄣ��
銆�銆�2. 瀵�闆诲�撹寖鍦嶏細鏀�鎸佸��2V鍒�6V鐨勫伐浣滈浕澹�锛岄仼鎳�(y墨ng)鎬у挤(qi谩ng)锛屽彲浠ュ吋瀹瑰�氱ó闆绘簮绯荤��(t菕ng)銆�
銆�銆�3. 楂樺櫔鑱插�归檺锛氱�﹀悎JEDEC妯�(bi膩o)婧�(zh菙n)锛岃兘澶犳湁鏁堟笡灏戝�栭儴骞叉摼灏�(du矛)淇¤櫉(h脿o)鐨勫奖闊�銆�
銆�銆�4. 浣庨潨鎱�(t脿i)鍔熻�楋細鍦ㄥ緟姗�(j墨)鐙�鎱�(t脿i)涓嬪咕涔庝笉娑堣�楀姛鐜囷紝闈炲父閬╁悎闆绘睜渚涢浕瑷�(sh猫)鍌�銆�
銆�銆�5. 宸ユキ(y猫)绱�(j铆)宸ヤ綔婧�搴︼細鑳藉湪妤电��婧�搴︽�濅欢涓嬫�ｅ父閬�(y霉n)琛�锛屽彲闈犳�ч珮銆�
銆�銆�6. 澶氱ó灏佽�濆彲閬革細鎻愪緵DIP鍜孲OIC绛夊皝瑁濆舰寮�锛屾柟渚夸笉鍚岃ō(sh猫)瑷�(j矛)闇�姹�銆�

SN74HC21 琚�寤ｆ硾鎳�(y墨ng)鐢ㄤ簬鍚勭ó鏁�(sh霉)瀛楅浕璺�涓�锛屽挨鍏舵槸鍦ㄩ渶瑕佸煼(zh铆)琛岄倧杓�閬�(y霉n)绠楃殑鍫�(ch菐ng)鍚�銆傚叾鍏稿瀷鎳�(y墨ng)鐢ㄥ寘鎷�锛�
銆�銆�1. 鏁�(sh霉)瀛椾俊铏�(h脿o)铏曠悊锛氱敤浜庣祫鍚堥倧杓�闆昏矾涓�鐨勬暩(sh霉)鎿�(j霉)璺�寰戞帶鍒�銆�
銆�銆�2. 绶ㄧ⒓鑸囪В纰硷細閰嶅悎鍏朵粬閭忚集鍣ㄤ欢瀹屾垚寰�(f霉)闆滅殑鏁�(sh霉)鎿�(j霉)绶ㄧ⒓鎴栬В纰间换鍕�(w霉)銆�
銆�銆�3. 寰�铏曠悊鍣ㄧ郴绲�(t菕ng)锛氫綔鐐哄湴鍧�璀�纰煎櫒鐨勪竴閮ㄥ垎锛屾垨鑰呯敤浣滅媭鎱�(t脿i)妾㈡脯(c猫)闆昏矾銆�
銆�銆�4. 閫氫俊鎺ュ彛锛氬湪涓茶�屾垨骞惰�岄�氫俊鍗�(xi茅)璀颁腑瀵�(sh铆)鐝�(xi脿n)鎻℃墜淇¤櫉(h脿o)鐢熸垚銆�
銆�銆�5. 娑堣不(f猫i)椤為浕瀛愮敘(ch菐n)鍝侊細濡傚�剁敤闆诲��銆佺帺鍏�銆侀煶闊胯ō(sh猫)鍌欑瓑鍏�(n猫i)閮ㄩ倧杓�鎺у埗妯″��銆�
銆�銆�6. 宸ユキ(y猫)鑷�鍕�(d貌ng)鍖栵細鐢ㄤ綔鍌虫劅鍣ㄤ俊铏�(h脿o)铏曠悊鎴栫啊(ji菐n)鍠�鎺у埗鍣ㄧ殑涓�閮ㄥ垎銆�

74HCT21, MC74HC21, NXP 74HC21