SN74ALS33A

SN54ALS33A, SN74ALS33A QUADRUPLE 2ĆINPUT POSITIVEĆNOR BUFFERS WITH OPENĆCOLLECTOR OUTPUTS SDAS034C − APRIL 1982 − REVISED FEBRUARY 2009 D Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These devices contain four independent 2-input positive-NOR buffers with open-collector outputs. Open-collector outputs require resistive pullup to perform correctly. They can deliver higher VOH levels and commonly are used in wired-AND applications. These devices perform the Boolean functions Y = A B or Y = A + B in positive logic. The SN54ALS33A is characterized for operation over the full military temperature range of − 55°C to 125°C. The SN74ALS33A is characterized for operation from 0°C to 70°C. FUNCTION TABLE (each gate) INPUTS AB OUTPUT Y HX L XH L LL H SN54ALS33A . . . J PACKAGE SN74ALS33A . . . D OR N PACKAGE (TOP VIEW) 1Y 1A 1B 2Y 2A 2B GND 1 2 3 4 5 6 7 14 VCC 13 4Y 12 4B 11 4A 10 3Y 9 3B 8 3A SN54ALS33A . . . FK PACKAGE (TOP VIEW) 1A 1Y NC VCC 4Y 1B 3 2 1 20 19 4 18 4B NC 5 17 NC 2Y 6 16 4A NC 7 15 NC 2A 8 14 3Y 9 10 11 12 13 2B GND NC 3A 3B NC − No internal connection logic symbol† logic diagram (positive logic) 2 1A 3 1B 5 2A 6 2B 8 3A 9 3B 11 4A 12 4B ≥1 1 1Y 4 2Y 10 3Y 13 4Y † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. 2 1A 3 1B 5 2A 6 2B 8 3A...