SN54F253

SN54F253, SN74F253 DUAL 1ĆOFĆ4 DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDFS064A − D2032, MARCH 1987 − REVISED OCTOBER 1993 3-State Versions of SN54F153 and SN74F153 Permits Multiplexing From N Lines to One Line Performs Parallel-to-Serial Conversion Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs description SN54F253 . . . J PACKAGE SN74F253 . . . D OR N PACKAGE (TOP VIEW) 1G 1 B2 1C3 3 1C2 4 1C1 5 1C0 6 1Y 7 GND 8 16 VCC 15 2G 14 A 13 2C3 12 2C2 11 2C1 10 2C0 9 2Y These data selectors/multiplexers contain inverters and drivers to supply full binary decoding data selection to the AND-OR gates. Separate output-control inputs are provided for each of the two 4-line sections. B 1G NC VCC 2G SN54F253 . . . FK PACKAGE (TOP VIEW) The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state), the low impedance of the single enabled output will drive the bus line to a high or low logic level. Each output has its own strobe (G) inputs. The output is disabled when its strobe is high. 1C3 3 2 1 20 19 4 18 A 1C2 5 17 2C3 NC 6 16 NC 1C1 7 15 2C2 1C0 8 14 2C1 9 10 11 12 13 1Y GND NC 2Y 2C0 The SN54F253 is characterized for operation over the full military temperature range of − 55°C to 125°C. The SN74F253 is characterized for operation from 0°C to 70°C. NC − No internal conn...