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SN74LS259D 数据表(PDF) 2 Page - ON Semiconductor |
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SN74LS259D 数据表(HTML) 2 Page - ON Semiconductor |
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2 / 8 page ![]() SN74LS259 http://onsemi.com 2 CONNECTION DIAGRAM DIP (TOP VIEW) Address Inputs Data Input Enable (Active LOW) Input Clear (Active LOW) Input Parallel Latch Outputs A0, A1, A2 D E C Q0 – Q7 0.5 U.L. 0.5 U.L. 1.0 U.L. 0.5 U.L. 10 U.L. 0.25 U.L. 0.25 U.L. 0.5 U.L. 0.25 U.L. 5 U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 mA HIGH/1.6 mA LOW. HIGH LOW (Note a) LOADING PIN NAMES 14 13 12 11 10 9 1234 5 6 7 16 15 8 VCC Ao C E DQ7 Q5 Q6 Q4 A1 A2 Q0 Q1 Q2 Q3 GND |
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