HD74HC673 - Hitachi Semiconductor

HD74HC673 16-bit Shift Register

The HD74HC673 is a 16-bit shift register and a 16-bit storage register in a single 24-pin package. A threestate input/output (data I/O) port to the shift register allows serial entry and/or reading of data. The storage register is connected in a parallel data loop with the shift register and may be asynchronously cleared by taking the store-clear input low. .

Features

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• High Speed Operation: tpd (MODE/STRCLK to Y) = 23 ns typ (C L = 50 pF) High Output Current: Fanout of 15 LSTTL Loads (Q15 output) Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) HD74HC673 Function Table Inputs Mode/ CS H X L L L L L L R/W SHCLK X X L H H H H L X X X X STRCLR X L X X X L H H STRCLK X X X X L H H Z Q15 Q14n L Y15n Z Yes No Yes Yes Yes No No Yes Yes No Yes No No No Yes Yes No Yes No No No No No No No Yes SER/ Q15 Z Shift Register Functions Read from Write into Storage Register Parallel.