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74ALVCH16843DGG Scheda tecnica(PDF) 3 Page - NXP Semiconductors |
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74ALVCH16843DGG Scheda tecnica(HTML) 3 Page - NXP Semiconductors |
3 / 12 page Philips Semiconductors Product specification 74ALVCH16843 18-bit bus interface D-type latch (3-State) 1998 Aug 04 3 PIN DESCRIPTION PIN NUMBER SYMBOL NAME AND FUNCTION 1 1CLR Clear input (active LOW) 2 1OE Output enable input (active LOW) 55 1PRE Preset input (active LOW) 56 1LE Latch enable input (active HIGH) 54, 52, 51, 49, 48, 47, 45, 44, 43 1D0 to 1D8 Data inputs 3, 5, 6, 8, 9, 10, 12, 13, 14 1Q0 to 1Q8 Data outputs 4, 11, 18, 25, 32, 39, 46, 53 GND Ground (0V) 7, 22, 35, 50 VCC Positive supply voltage 27 2OE Output enable input (active LOW) 28 2CLR Clear input (active LOW) 29 2LE Latch enable input (active HIGH) 30 2PRE Preset input (active LOW) 42, 41, 40, 38, 37, 36, 34, 33, 31 2D0 to 2D8 Data inputs 15, 16, 17, 19, 20, 21, 23, 24, 26 2Q0 to 2Q8 Data outputs FUNCTION TABLE INPUTS OUTPUT nPRE nCLR nOE LE DX Q L X L X X H H L L X X L H H L H L L H H L H H H H H L H X Q0 X X H H X Z H = HIGH voltage level L = LOW voltage level X = Don’t care Z = High impedance “off” state LOGIC SYMBOL 54 52 51 49 48 47 45 44 41 40 38 37 36 34 33 31 3 5 6 8 9 10 12 13 16 17 19 20 21 23 24 26 1D0 1D1 1D2 1D3 1D4 1D5 1D6 1D7 1D8 2D0 2D1 2D2 2D3 2D4 2D5 2D6 2D7 1Q0 1Q1 1Q2 1Q3 1Q4 1Q5 1Q6 1Q7 1Q8 2Q0 2Q1 2Q2 2Q3 2Q4 2Q5 2Q6 2Q7 2D8 2Q8 1OE 1LE 2OE 2LE 256 27 29 SH00144 1CLR 1PRE 2CLR 2PRE 155 28 30 14 15 43 42 |
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