U74HC74

UNISONIC TECHNOLOGIES CO., LTD U74HC74 DUAL D FLIP-FLOP WITH SET AND RESET,POSITIVE-EDGEN TRIGGER „ DESCRIPTION The U74HC74 contains dual D flip-flops and each flip-flop has independent DATA, SET , RESET and clock inputs and complementary outputs Q and Q . A low level at appropriate input helps SET and RESET adjust the output. Data will be transferred to the output during the low-to-high transition of the CLK while SET and RESET are high. „ FEATURES * Operation Voltage Range: 2~6V * Buffered Inputs * Asynchronous Set and Reset * Complementary Outputs * High Noise Immunity „ ORDERING INFORMATION Ordering Number U74HC74G-P14-R U74HC74G-S14-R Package TSSOP-14 SOP-14 Packing Tape Reel Tape Reel CMOS IC www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 5 QW-R502-385.A U74HC74 „ PIN CONFIGURATION 1R 1 1D 2 1CP 3 1S 4 1Q 5 1Q 6 GND 7 14 VCC 13 2R 12 2D 11 2CP 10 2S 9 2Q 8 2Q „ FUNCTION TABLE (each gate) INPUT OUTPUT SET RESET CP D Q Q L H × ×HL H L × × LH H H ↑HHL H H↑LLH H H L × Q0 Q0 L L × × H (note) H (note) Note: Unstable state, it will not persist when set and reset inputs return to their inactive level. „ FUNCTIONAL DIAGRAM Logic Diagram R S C D TG C TG CC C CP C C TG C TG CC Q Q IEC logic symbol CMOS IC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-385.A U74HC74 CMOS IC „ ABSOLUTE MAXIMUM RATING (unless otherwise specified)(Note 1) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -...