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SN54AS882AFK Datasheet(PDF) 1 Page - Texas Instruments |
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SN54AS882AFK Datasheet(HTML) 1 Page - Texas Instruments |
1 / 9 page SN54AS882A, SN74AS882A 32-BIT LOOK-AHEAD CARRY GENERATORS SDAS235 – D2661, DECEMBER 1982 – REVISED NOVEMBER 1985 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Copyright © 1985, Texas Instruments Incorporated 1 • Directly Compatible With ’AS181B, ’AS1181, ’AS881B, and ’AS1881 ALUs • Package Options Include Plastic Small Outline Packages, Both Plastic and Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs • Capable of Anticipating the Carry Across a Group of Eight 4-Bit Binary Adders • Cascadable to Perform Look-Ahead Across n-Bit Adders • Typical Carry Time, C n to Any Cn+i, is Less Than 6 ns • Dependable Texas Instruments Quality and Reliability description The ’AS882A is a high-speed look-ahead carry generator capable of anticipating the carry across a group of eight 4-bit adders permitting the designer to implement look-ahead for a 32-bit ALU with a single package or, by cascading ’AS882As, full look-ahead is possible across n-bit adders. The SN54AS882A is characterized for operation over the full military temperature range of – 55 °C to 125 °C. The SN74AS882A is characterized for operation from 0 °C to 70°C. ’AS882A LOGIC EQUATIONS Cn+8 = G1 + P1G0+P1P0Cn Cn+16 = G3 + P3G2 + P3P2G1 + P3P2P1G0 + P3P2P1P0Cn Cn+24 = G5 + P5G4 + P5P4G3 + P5P4P3G2 + P5P4P3P2G1 + P5P4P3P2P1G0 + P5P4P3P2P1P0Cn Cn+32 = G7 + P7G6 + P7P6G5 + P7P6P5G4 + P7P6P5P4G3 + P7P6P5P4P3G2 + P7P6P5P4P3P2G1 + P7P6P5P4P3P2P1G0 + P7P6P5P4P3P2P1P0Cn 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 Cn G0 P0 G1 P1 Cn + 8 G2 P2 G3 P3 Cn – 16 GND VCC NC Cn + 32 P7 G7 P6 G6 Cn + 24 P5 G5 P4 G4 SN54AS882A . . . JT PACKAGE SN74AS882A . . . DW OR NT PACKAGE (TOP VIEW) 32 1 13 14 5 6 7 8 9 10 11 P7 G7 P6 NC G6 Cn + 24 P5 G1 P1 Cn + 8 NC G2 P2 G3 4 15 16 17 18 SN54AS882A . . . FK PACKAGE SN74AS882A . . . DW OR NT PACKAGE (TOP VIEW) 28 27 26 25 24 23 22 21 20 19 12 NC – No internal connection PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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