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SN74ALS165 Arkusz danych(PDF) 1 Page - Texas Instruments |
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SN74ALS165 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 14 page SN54ALS165, SN74ALS165 PARALLELLOAD 8BIT REGISTERS SDAS157B − JUNE 1982 − REVISED DECEMBER 1994 Copyright 1994, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 • Complementary Outputs • Direct Overriding Load (Data) Inputs • Gated Clock Inputs • Parallel-to-Serial Data Conversion • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description The ′ALS165 are parallel-load 8-bit serial shift registers that, when clocked, shift the data toward serial (QH and QH) outputs. Parallel-in access to each stage is provided by eight individual direct data (A− H) inputs that are enabled by a low level at the shift/load (SH/LD) input. The ′ALS165 have a clock-inhibit function and complemented serial outputs. Clocking is accomplished by a low-to-high transition of the clock (CLK) input while SH/LD is held high and the clock inhibit (CLK INH) input is held low. The functions of CLK and CLK INH are interchangeable. Since a low CLK and a low-to-high transition of CLK INH also accomplishes clocking, CLK INH should be changed to the high level only while CLK is high. Parallel loading is inhibited when SH/LD is held high. The parallel inputs to the register are enabled while SH/LD is low independently of the levels of the CLK, CLK INH, or serial (SER) inputs. The SN54ALS165 is characterized for operation over the full military temperature range of −55 °C to 125°C. The SN74ALS165 is characterized for operation from 0 °C to 70°C. FUNCTION TABLE INPUTS FUNCTION SH/LD CLK CLK INH FUNCTION L X X Parallel load H H X No change H X H No change H L ↑ Shift† H ↑ L Shift† † Shift = content of each internal register shifts toward serial outputs. Data at SER is shifted into first register. SN54ALS165 ...J PACKAGE SN74ALS165 ...D OR N PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 D C NC B A E F NC G H SN54ALS165 . . . FK PACKAGE (TOP VIEW) NC − No internal connection 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 SH/LD CLK E F G H QH GND VCC CLK INH D C B A SER QH 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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