SN54AC564, SN74AC564 OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS

SCAS551A - NOVEMBER 1995 - REVISED MAY 1996

features

• 3-State Inverting Outputs Drive Bus Lines Directly
• Full Parallel Access for Loading
• Flow-Through Architecture to Optimize PCB Layout
• EPIC^TM (Enhanced-Performance Implanted CMOS) 1-m Process
• Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), Thin Shrink Small-Outline (PW), Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic (N) and Ceramic (J) DIPs

   

  EPIC is a trademark of Texas Instruments Incorporated.

description

The 'AC564 are octal D-type edge-triggered flip-flops that featureinverting 3-state outputs designed specifically for driving highlycapacitive or relatively low-impedance loads. They are particularlysuitable for implementing buffer registers, I/O ports, bidirectionalbus drivers, and working registers.

On the positive transition of the clock (CLK) input, the Q\outputs are set to the inverse logic levels set up at the data (D)inputs.

A buffered output-enable () input places the eight outputs in either a normallogic state (high or low logic levels) or the high-impedance state.In the high-impedance state, the outputs neither load nor drive thebus lines significantly. The high-impedance state and increased driveprovide the capability to drive bus lines without interface or pullupcomponents.

does not affectinternal operations of the flip-flops. Old data can be retained ornew data can be entered while the outputs are in the high-impedancestate.

The SN54AC564 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. The SN74AC564is characterized for operation from -40°C to 85°C.

View more information about generic part numbers:SN74AC564

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