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MM54C173 Datasheet TRI-STATE Quad D Flip-Flop

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: MM54C173 MM74C173 TRI-STATE Quad D Flip-Flop February 1988 MM54C173 MM74C173 TRI-STATE Quad D.

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General Description

The MM54C173 MM74C173 TRI-STATE quad D flip-flop is a monolithic complementary MOS (CMOS) integrated circuit constructed with N- and P-channel enhancement transistors The four D-type flip-flops operate synchronously from a common clock The TRI-STATE output allows the device to be used in bus-organized systems The outputs are placed in the TRI-STATE mode when either of the two output disable pins are in the logic ‘‘1’’ level The input disable allows the flip-flops to remain in their present states without disrupting the clock If either of the two input disables are taken to a logic ‘‘1’’ level the Q outputs are fed back to the inputs and in this manner the flip-flops do not change state Clearing is enabled by taking the input to a logic ‘’1’’ level Clocking occurs on the positive-going transition

Key Features

  • Y Y Y Y Y Y Y Supply voltage range 3V to 15V Tenth power TTL compatible Drive 2 LPTTL loads High noise immunity 0 45 VCC (typ ) Low power Medium speed operation High impedance TRI-STATE Input disable without gating the clock.

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