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SN54AC573W Datasheet(PDF) 1 Page - Texas Instruments |
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SN54AC573W Datasheet(HTML) 1 Page - Texas Instruments |
1 / 6 page SN54AC573, SN74AC573 OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS SCAS542B - OCTOBER 1995 – REVISED NOVEMBER 1996 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D 3-State Outputs Drive Bus Lines Directly D EPIC ™ (Enhanced-Performance Implanted CMOS) 1- µm Process D Package Options Include Plastic Small-Outline (DW) Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic (N) and Ceramic (J) DIPs description These 8-bit latches feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. The devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight latches are D-type transparent latches. When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the logic levels set up at the D Inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-imped- ance 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 in a bus-organized system without need for 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 in the high-impedance state. The SN54AC573 is characterized for operation over the full military temperature range of –55 _C to 125_C. The SN74AC573 is characterized for operation from –40 _C to 85_C. FUNCTION TABLE (each latch) INPUTS OUTPUT OE LE D Q L H H H L HL L L LX Q0 H X X Z Copyright © 1996, Texas Instruments Incorporated EPIC is a trademark of Texas Instruments Incorporated. UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information 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. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 OE 1D 2D 3D 4D 5D 6D 7D 8D GND VCC 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q LE SN54AC573 ...J OR W PACKAGE SN74AC573 . . . DB, DW, N, OR PW PACKAGE (TOP VIEW) 3 2 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 2Q 3Q 4Q 5Q 6Q 3D 4D 5D 6D 7D SN54AC573 . . . FK PACKAGE (TOP VIEW) |
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