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74ALVT16821DL Datasheet(PDF) 4 Page - NXP Semiconductors |
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74ALVT16821DL Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 13 page Philips Semiconductors Product specification 74ALVT16821 2.5V/3.3V 20-bit bus-interface D-type flip-flop; positive-edge trigger (3-State) 1998 Feb 13 4 PIN DESCRIPTION PIN NUMBER SYMBOL FUNCTION 56, 54, 52, 51, 49, 48, 47, 45, 44, 43, 42, 41, 40, 38, 37, 36, 34, 33, 31, 30 1D0 - 1D9 2D0 - 2D9 Data inputs 2, 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16, 17, 19, 20, 21, 23, 24, 26, 27 1Q0 - 1Q9 2Q0 - 2Q9 Data outputs 1, 28 1OE, 2OE Output enable inputs (active-Low) 56, 29 1CP, 2CP Clock pulse inputs (active rising edge) 4, 11, 18, 25, 32, 39, 46, 53 GND Ground (0V) 7, 22, 35, 50 VCC Positive supply voltage FUNCTION TABLE INPUTS INTERNAL OUTPUTS OPERATING nOE nCP nDx INTERNAL REGISTER nQ0 - nQ9 OPERATING MODE L L ↑ ↑ l h L H L H Load and read register L ↑ X NC NC Hold H H ↑ ↑ X Dn NC Dn Z Z Disable outputs H = High voltage level h = High voltage level one set-up time prior to the Low-to-High clock transition L = Low voltage level l = Low voltage level one set-up time prior to the Low-to-High clock transition NC= No change X = Don’t care Z = High impedance “off” state ↑ = Low to High clock transition ↑ = Not a Low-to-High clock transition LOGIC DIAGRAM CP Q D nD0 nQ0 nCP nOE CP Q D nD1 nQ1 CP Q D nD2 nQ2 CP Q D nD3 nQ3 CP Q D nD4 nQ4 CP Q D nD5 nQ5 CP Q D nD6 nQ6 CP Q D nD7 nQ7 CP Q D nD8 nQ8 CP Q D nD9 nQ9 SH00004 |
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