閭忚集椤�(l猫i)鍨嬶細闆欏洓璺�鏁�(sh霉)鎿�(j霉)閬告搰鍣�/澶氳矾寰�(f霉)鐢ㄥ櫒
銆�銆�灏佽�濆舰寮忥細DIP16/SOIC16
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銆�銆�鍌虫挱寤堕伈鏅�(sh铆)闁擄細鍏稿瀷鍊� 9ns
銆�銆�鏈�澶у伐浣滄韩搴﹁寖鍦嶏細-55掳C 鑷� +125掳C
銆�銆�杓稿叆闆绘祦锛毬�1mA
銆�銆�杓稿嚭闆绘祦锛毬�8mA

SN74LS257B 鐨勪富瑕佺壒鎬у寘鎷�浠ヤ笅骞鹃��(di菐n)锛�
銆�銆�1. 闆欓�氶亾绲�(ji茅)妲�(g貌u)锛氬彲浠ュ悓鏅�(sh铆)铏曠悊鍏╃祫鐛�(d煤)绔嬬殑鍥涜矾鏁�(sh霉)鎿�(j霉)閬告搰浠诲嫏(w霉)銆�
銆�銆�2. TTL 鍏煎�规�э細鍏锋湁妯�(bi膩o)婧�(zh菙n)鐨� TTL 杓稿叆鍜岃几鍑洪浕骞筹紝纰轰繚鑸囧叾浠� 74 绯诲垪鍣ㄤ欢鐨勮壇濂藉吋瀹规��銆�
銆�銆�3. 楂橀�熸�ц兘锛氬偝鎾�寤堕伈鏅�(sh铆)闁撶煭锛岄仼鍚堥珮閫熸暩(sh霉)瀛楅浕璺�鎳�(y墨ng)鐢�銆�
銆�銆�4. 闈堟椿鐨勬帶鍒讹細閫氶亷(gu貌)鍠�鐛�(d煤)鐨勪娇鑳藉紩鑵冲拰閬告搰寮曡叧瀵�(sh铆)鐝�(xi脿n)灏�(du矛)鏁�(sh霉)鎿�(j霉)娴佺殑绮剧⒑鎺у埗銆�
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SN74LS257B 甯哥敤浜庝互涓嬫噳(y墨ng)鐢ㄥ牬(ch菐ng)鏅�锛�
銆�銆�1. 鏁�(sh霉)鎿�(j霉)绺界窔鍒囨彌锛氬湪澶氳ō(sh猫)鍌欏叡浜�鍚屼竴鏁�(sh霉)鎿�(j霉)绺界窔鐨勬儏娉佷笅锛岄�氶亷(gu貌) SN74LS257B 瀵�(sh铆)鐝�(xi脿n)淇¤櫉(h脿o)鐨勯伕鎿囪垏鍒囨彌銆�
銆�銆�2. 鏁�(sh霉)瀛椾俊铏�(h脿o)璺�鐢憋細鐢ㄤ簬寰�(f霉)闆滅殑鏁�(sh霉)瀛楃郴绲�(t菕ng)涓�锛屽畬鎴愪笉鍚屾暩(sh霉)鎿�(j霉)璺�寰戜箣闁撶殑杞�(zhu菐n)鎻�銆�
銆�銆�3. 澶氳矾杓稿叆閬告搰锛氬湪闇�瑕佸緸澶氬��(g猫)鍌虫劅鍣ㄦ垨杓稿叆婧愪腑閬告搰鐗瑰畾淇¤櫉(h脿o)鐨勫牬(ch菐ng)鍚堜笅浣跨敤銆�
銆�銆�4. 宸ユキ(y猫)鑷�鍕�(d貌ng)鍖栨帶鍒讹細浣滅偤鏍稿績绲勪欢涔嬩竴锛屽弮鑸囨��(g貌u)寤哄伐妤�(y猫)鎺у埗绯荤当(t菕ng)涓�鐨勪俊铏�(h脿o)绠＄悊妯″�娿��
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SN74LS257N