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Philips Semiconductors
Product specification
Quad serial adder/subtractor
74F385
FEATURES
• Four independent adders/subtractors • Two’s complement arithmetic • Synchronous operation • Common Clear and Clock • 74F385 is designed for use with serial multipliers in implementing
digital filters and butterfly networks in fast Fourier transforms
PIN CONFIGURATION
CP 1 F0 2 S0 3 B0 4 A0 5 A1 6 20 V CC 19 F3 18 S3 17 B3 16 A3 15 A2 14 B2 13 S2 12 F2 11 MR
DESCRIPTION
The 74F385 contains four independent adder/subtractor elements with common Clock and Master Reset. Each adder/subtractor contains a sum flop-flop and a carry flip-flop for synchronous operations. Flip-flop state changes occur on the rising edge of the Clock Pulse (CP) input signal.