74F583

INTEGRATED CIRCUITS 74F583 4-bit BCD adder Product specification IC15 Data Handbook 1989 Apr 06 Philips Semiconductors Philips Semiconductors Product specification 4-bit BCD adder 74F583 FEATURES Adds two decimal numbers Full internal look-ahead Fast ripple carry for economical expansion Sum output delay 19.5 ns max. Ripple carry delay 8.5 ns max. Input to ripple delay 13.0 ns max. Supply current 60 mA max. DESCRIPTION The 74F583 4-bit coded (BCD) full adder performs the addition of two decimal numbers (A0–A3, B0–B3). The look-ahead generates BCD carry terms internally, allowing the 74F583 to then do BCD addition correctly. For BCD numbers 0 through 9 at A and B inputs, the BCD sum forms at the output. In addition of two BCD numbers totalling a number greater than 9, a valid BCD number and carry will result. For input values larger than 9, the number is converted from binary to BCD. Binary to BCD conversion occurs by grounding one set of inputs, An or Bn, and applying a 4-bit binary number to the other set of inputs. If the input is between 0 and 9, a BCD number occurs at the output. If the binary input falls between 10 and 15, a carry term is generated. Both the carry term and the sum are the BCD equivalent of the binary input. Converting binary numbers greater than 16 may be achieved by cascading 74F583s. PIN CONFIGURATION B1 1 B2 B3 A3 Cn Cn+4 S2 GND 2 3 4 5 6 7 8 16 VCC 15 A2 14 A1 13 A0 12 B0 11 S0 10 S1 9 S3 SF01436 TYPE 74F583 TYPICAL PROPAGAT...