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SN74ALS533AN 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74ALS533AN 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 16 page 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 OE 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND VCC 8Q 8D 7D 7Q 6Q 6D 5D 5Q LE DW OR N PACKAGE (TOP VIEW) SN74ALS533A, SN74AS533A OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS SDAS270 – DECEMBER 1994 Copyright © 1994, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • Eight Latches in a Single Package • 3-State Bus-Driving Inverting Outputs • Full Parallel Access for Loading • Buffered Control Inputs • pnp Inputs Reduce dc Loading on Data Lines • Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs description These 8-bit D-type transparent latches feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. While latch-enable (LE) input is high, the Q outputs follow the complements of the data (D) inputs. When LE is taken low, the Q outputs are latched at the inverses of the levels set up at the D inputs. The SN74ALS533A and SN74AS533A are functionally equivalent to the SN74ALS373A and SN74AS373, except for having inverted outputs. A buffered output-enable (OE) input places the eight outputs in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components. OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered while the outputs are off. The SN74ALS533A and SN74AS533A are characterized for operation from 0 °C to 70°C. FUNCTION TABLE (each latch) INPUTS OUTPUT OE LE D Q L H H L L HL H L LX Q0 H X X Z PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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