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SN74AS822DW 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74AS822DW 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 6 page SN54AS821, SN54AS822, SN74AS821, SN74AS822 10-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS SDAS230 – D2825, DECEMBER 1983 – REVISED JANUARY 1986 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Copyright © 1986, Texas Instruments Incorporated 5BASIC 1 • Functionally Equivalent to AMD’s AM29821 and AM29822 • Provides Extra Data Width Necessary for Wider Address/Data Paths or Buses With Parity • Outputs Have Undershoot Protection Circuitry • Powerup High-impedance State • Package Options Include Plastic Small Outline Packages, Both Plastic and Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs • Buffered Control Inputs to Reduce DC Loading Effects • Dependable Texas Instruments Quality and Reliability description These 10-bit flip-flops feature 3-state outputs designed specifically for driving highly-capacitive or relatively low-impedance loads. They are particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers. The ten flip-flops are edge-triggered D-type flip-flops. On the positive transition of the clock the Q outputs on the ’AS821 will be true, and on the ’AS822 will be complementary to the data input. A buffered output-control input can be used to place the ten outputs in either a normal logic state (high or low 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 the bus lines in a bus-organized system without need for interface or pullup components. The output control (OC) does not affect the internal operation 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 SN54AS’ family is characterized for operation over the full military temperature range of – 55 °C to 125°C. The SN74AS’ family is characterized for operation from 0 °C to 70°C. 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 OC 1D 2D 3D 4D 5D 6D 7D 8D 9D 10D GND VCC 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q 9Q 10Q CLK SN54AS822 . . . JT PACKAGE SN74AS822 . . . DW OR NT PACKAGE (TOP VIEW) 32 1 13 14 5 6 7 8 9 10 11 3Q 4Q 5Q NC 6Q 7Q 8Q 3D 4D 5D NC 6D 7D 8D 4 15 16 17 18 SN54AS821 . . . FK PACKAGE SN74AS821 . . . FN PACKAGE (TOP VIEW) 28 27 26 25 24 23 22 21 20 19 12 32 1 13 14 5 6 7 8 9 10 11 3Q 4Q 5Q NC 6Q 7Q 8Q 3D 4D 5D NC 6D 7D 8D 4 15 16 17 18 SN54AS822 . . . FK PACKAGE SN74AS822 . . . FN PACKAGE (TOP VIEW) 28 27 26 25 24 23 22 21 20 19 12 NC–No internal connection 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 OC 1D 2D 3D 4D 5D 6D 7D 8D 9D 10D GND VCC 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q 9Q 10Q VCC SN54AS821 . . . JT PACKAGE SN74AS821 . . . DW OR NT PACKAGE (TOP VIEW) 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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