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SN74F283NSRE4 Scheda tecnica(PDF) 1 Page - Texas Instruments |
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SN74F283NSRE4 Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 16 page SN54F283, SN74F283 4BIT BINARY FULL ADDERS WITH FAST CARRY SDFS069A − D2932, MARCH 1987 − REVISED OCTOBER 1993 Copyright 1993, Texas Instruments Incorporated 2−1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 • Full-Carry Look-Ahead Across the Four Bits • Systems Achieve Partial Look-Ahead Performance With the Economy of Ripple Carry • Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs description The ′F283 is a full adder that performs the addition of two 4-bit binary words. The sum ( Σ) outputs are provided for each bit and the resultant carry (C4) output is obtained from the fourth bit. The device features full internal look-ahead across all four bits generating the carry term C4 in typically 5.7 ns. This capability provides the system designer with partial look-ahead performance at the economy and reduced package count of a ripple-carry implementation. The adder logic, including the carry, is implemented in its true form. End-around carry can be accomplished without the need for logic or level inversion. The ′F283 can be used with either all-active-high (positive logic) or all-active-low (negative logic) operands. The SN54F283 is characterized for operation over the full military temperature range of − 55 °C to 125 °C. The SN74F283 is characterized for operation from 0 °C to 70°C. logic symbol† Σ 0 6 B1 0 5 A1 3 A2 14 A3 3 12 A4 2 B2 15 B3 3 11 B4 CI 7 C0 C4 9 CO Σ1 4 0 1 13 10 3 Σ2 Σ3 Σ4 P Q Σ † 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. SN54F283 ...J PACKAGE SN74F283 ...D OR N PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 A3 Σ3 NC A4 B4 A2 Σ1 NC A1 B1 SN54F283 . . . FK PACKAGE (TOP VIEW) NC − No internal connection 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 Σ2 B2 A2 Σ1 A1 B1 C0 GND VCC B3 A3 Σ3 A4 B4 Σ4 C4 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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