74hc257a IK Semicon Co., Ltd, 74hc257a Datasheet
74hc257a
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74hc257a Summary of contents
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... Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS The IN74HC257A is identical in pinout to the LS/ALS257. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL outputs. This device selects a (4-bit) nibble from either the inputs as determined by the Select input ...
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... Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V outputs must be left open and GND Pins SOIC Package+ Parameter and V should be constrained to the range GND≤(V IN OUT IN74HC257A Value Unit -0.5 to +7 ±20 mA ±35 mA ±75 mA 750 mW 500 ° ...
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... IH IL ⎢I ⎢ ≤ 6.0 mA 4.5 OUT ⎢I ⎢ ≤.7.8 mA 6.0 OUT GND 6 Output in High-Impedance 6.0 State GND OUT GND 6 =0µA OUT IN74HC257A Guaranteed Limit 25 °C ≤85 ≤125 Unit °C °C to -55°C 1.5 1.5 1.5 V 3.15 3.15 3.15 4.2 4.2 4.2 0.3 0.3 0.3 V 0.9 0.9 0.9 1.2 1.2 1.2 1.9 1.9 1.9 V 4.4 4.4 4.4 5.9 5.9 5 ...
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... Typical @25°C,V =5 Figure 2. Switching Waveforms IN74HC257A ≤125°C Unit 150 150 225 225 Rev. 00 ...
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... Figure 3. Switching Waveforms Figure 4. Test Circuit EXPANDED LOGIC DIAGRAM IN74HC257A Figure 5. Test Circuit Rev. 00 ...
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... Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B ‑ 0.25 mm (0.010) per side. N SUFFIX PLASTIC DIP (MS - 001BB SEATING -T- PLANE SUFFIX SOIC (MS - 012AC SEATING PLANE IN74HC257A Dimension, mm Symbol MIN MAX A 18.67 19.69 B 6.1 7.11 5. 0.36 0.56 F 1.14 1.78 2. 7.62 J 0° 10° 2.92 3 ...