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LS3718 Folha de dados(PDF) 6 Page - Unisonic Technologies |
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LS3718 Folha de dados(HTML) 6 Page - Unisonic Technologies |
6 / 8 page LS3718 CMOS IC UNISONICTECHNOLOGIESCO.,LTD 6 of 8 www.unisonic.com.tw QW-R121-015.A FUNCTION DESCRIPTION RESET When the CLR terminal is "L" level, all latches are reset and all of parallel output are "L" level. Normally, the CLR terminal should be "H" level. DATA TRANSMISSION When the STB terminal is "H" level and input the clock signal to the CLK terminal, the serial data input the DATA terminal and shift in the shift register by synchronizing at rising edge of the clock signal. When the STB terminal is changed to "L" level, the data in the shift register are transferred to the latch. Even if the STB terminal is "L" level, the input clock signal shift the data in the shift register, therefore, the clock signal controlled is needed. CASCADE CONNECTION The serial data input from DATA terminal and output from the SO terminal through internal shift register unrelated to the CLR and STB status. Furthermore, the 4 input terminals have a hysteresis characteristic by using the schmitt trigger structure to decrease the noise. CLK STB CLR DESCRIPTION X X L All latch are reset (the data in the shift register is not change). All of parallel outputs are "L". H H The serial data input from DATA terminal to the shift register (the data in the latch is not change). L H The data in the shift register transfer to the latch. And the data in the latch output from the parallel output. L H The CLK input in the STB="L" and CLR="H" state, the data shift in the shift register and latched data also change in accordance with the shift register. Note: X: Don’t care |
Nº de peça semelhante - LS3718 |
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Descrição semelhante - LS3718 |
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