SN54ACT564, SN74ACT564 OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS

SCAS549A - NOVEMBER 1995 - REVISED MAY 1996

features

• Inputs Are TTL-Voltage Compatible
• EPIC^TM (Enhanced-Performance Implanted CMOS) 1-m Process
• 3-State Inverted Outputs Drive Bus Lines Directly
• Flow-Through Architecture to Optimize PCB Layout
• Full Parallel Access for Loading
• 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 'ACT564 are octal D-type edge-triggered flip-flops thatfeature 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 complements of the logic levels set up at thedata (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 SN54ACT564 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. TheSN74ACT564 is characterized for operation from -40°C to85°C.

View more information about generic part numbers:SN74ACT564

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