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闁辫畝锛�28
CD74HCT257 鏄竴娆� 4 浣嶉洐鍚戠附绶氭敹鐧�(f膩)鍣�锛屽爆浜� HCT 绯诲垪 CMOS 鏁�(sh霉)瀛楅倧杓櫒浠躲�傝┎鑺墖鑳藉鍦ㄥ叐鍊嬫柟鍚戜笂鍌宠几鏁�(sh霉)鎿氫俊铏�锛屽唬娉涚敤浜庢暩(sh霉)瀛楃郴绲�(t菕ng)涓渶瑕佹暩(sh霉)鎿氱珐娌栧拰鏂瑰悜鎺у埗鐨勫牬鏅�銆傚叾瑷▓鏀寔 TTL 鍜� CMOS 闆诲钩鍏煎锛屽叿鏈変綆鍔熻�楀拰楂樺櫔鑱插闄愮殑鐗归粸銆�
銆�銆�CD74HCT257 鍖呭惈鍥涘�嬬崹绔嬬殑闆欏悜鍌宠几閫氶亾锛屾瘡鍊嬮�氶亾鑳藉鍌宠几涓�浣嶆暩(sh霉)鎿�銆傞�氶亷鏂瑰悜鎺у埗寮曡叧 (DIR) 鍜屼笁鎱�(t脿i)浣胯兘寮曡叧 (OE)锛屽彲浠ラ潏娲诲湴鎺у埗鏁�(sh霉)鎿氱殑娴佸悜鍜岃几鍑虹媭鎱�(t脿i)銆�
渚涢浕闆诲锛�2V 鑷� 6V
銆�銆�宸ヤ綔婧害鑼冨湇锛�-55掳C 鑷� +125掳C
銆�銆�鍌虫挱寤堕伈鏅傞枔锛氭渶澶� 18ns锛堝吀鍨嬪�硷級
銆�銆�杓稿叆闆绘祦锛毬�1mA
銆�銆�杓稿嚭闆绘祦锛毬�25mA
銆�銆�灏佽褰㈠紡锛�16 寮曡叧 DIP銆丼OIC銆乀SSOP
1. 闆欏悜鏁�(sh霉)鎿氬偝杓歌兘鍔涳紝閬╃敤浜庡绋附绶氭灦妲�銆�
銆�銆�2. 鏀寔涓夋厠(t脿i)杓稿嚭鍔熻兘锛屼究浜庡璺俊铏熷叡浜悓涓�绺界窔銆�
銆�銆�3. 鍏煎 TTL 鍜� CMOS 闆诲钩妯欐簴锛岄仼鍚堟贩鍚堥浕璺挵(hu谩n)澧�銆�
銆�銆�4. 楂樺櫔鑱插闄愯ō瑷堬紝澧炲挤浜嗘姉骞叉摼鎬ц兘銆�
銆�銆�5. 瀵緵闆婚浕澹撹寖鍦�锛岄仼鎳夋�у挤銆�
銆�銆�6. 灏忓瀷鍖栧皝瑁濋伕闋�锛岀瘈(ji茅)鐪� PCB 绌洪枔銆�
銆�銆�7. 宸ヤ綔婧害鑼冨湇寤�锛岄仼鍚堝伐妤�(y猫)鍜屽晢妤�(y猫)鎳夌敤銆�
CD74HCT257 寤ｆ硾鎳夌敤浜庨渶瑕侀洐鍚戞暩(sh霉)鎿氬偝杓稿拰绺界窔绠＄悊鐨勫牬鏅�锛屼緥濡傦細
銆�銆�1. 寰檿鐞嗗櫒鑸囧瑷箣闁撶殑鏁�(sh霉)鎿氶�氫俊銆�
銆�銆�2. 瀛樺劜鍣ㄦ摯灞曚腑鐨勫湴鍧�鎴栨暩(sh霉)鎿氱附绶氱珐娌�銆�
銆�銆�3. 澶氬�嬫ā濉婂叡浜悓涓�绺界窔鐨勬暩(sh霉)鎿氱鐞嗙郴绲�(t菕ng)銆�
銆�銆�4. 鏁�(sh霉)鎿氶噰闆嗙郴绲�(t菕ng)涓殑淇¤櫉绶╂矕銆�
銆�銆�5. 宸ユキ(y猫)鑷嫊鍖栬ō鍌欎腑鐨勪俊铏熷垏鎻�銆�
銆�銆�6. 閫氫俊鎺ュ彛鐨勪俊铏熻檿鐞嗗拰闅旈洟銆�
銆�銆�7. 娓│瑷倷鍜屽剙鍣ㄥ剙琛ㄤ腑鐨勪俊铏熻矾鐢辨帶鍒�銆�
74HCT257, SN74HCT257, MC74HCT257
