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SN74AS374N Datasheet(PDF) 1 Page - Texas Instruments |
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SN74AS374N Datasheet(HTML) 1 Page - Texas Instruments |
1 / 23 page SN54ALS374A, SN54AS374, SN74ALS374A, SN74AS374 OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS SDAS167C – APRIL 1982 – REVISED NOVEMBER 1999 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D D-Type Flip-Flops in a Single Package With 3-State Bus Driving True Outputs D Full Parallel Access for Loading D Buffered Control Inputs D Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs description These octal D-type edge-triggered flip-flops 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. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels set up at the data (D) inputs. A buffered output-enable (OE) input places the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without interface or pullup components. OE does not affect internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN54ALS374A and SN54AS374 are characterized for operation over the full military temperature range of –55 °C to 125°C. The SN74ALS374A and SN74AS374 are characterized for operation from 0°C to 70°C. FUNCTION TABLE (each flip-flop) INPUTS OUTPUT OE CLK D Q L ↑ H H L ↑ LL L H or L X Q0 H X X Z Copyright © 1999, Texas Instruments Incorporated 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. 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 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND VCC 8Q 8D 7D 7Q 6Q 6D 5D 5Q CLK SN54ALS374A, SN54AS374 . . . J PACKAGE SN74ALS374A, SN74AS374 . . . DW OR N PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 8D 7D 7Q 6Q 6D 2D 2Q 3Q 3D 4D SN54ALS374A, SN54AS374 . . . FK PACKAGE (TOP VIEW) On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
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