74HC273

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Octal D Flip-Flop with Common Clock and Reset

Below is the parameter table and instructions for the 74HC273 D-type flip-flop with 3-state outputs.

74HC273 Parameter Table

74HC273 Instructions

Pin Configuration

1. D0-D7: Data inputs
2. Q0-Q7: Data outputs
3. CLK: Clock input
4. /OE: Output enable (active low)
5. /CLR: Clear input (active low)
6. V_CC: Positive supply voltage
7. GND: Ground

Functional Description

• D-Type Flip-Flops: The 74HC273 contains eight D-type flip-flops with 3-state outputs.
• Clock Input (CLK): The data on the D inputs is transferred to the Q outputs on the rising edge of the clock signal.
• Output Enable (/OE): When /OE is low, the outputs are enabled. When /OE is high, the outputs are in a high-impedance state.
• Clear Input (/CLR): When /CLR is low, all flip-flops are reset, and the Q outputs are set to low.
• Power Supply (V_CC and GND): Connect V_CC to the positive supply voltage and GND to ground.

Usage Examples

1. Basic Operation:

   • Set the data inputs (D0-D7) to the desired values.
   • Apply a rising edge to the clock input (CLK) to transfer the data to the outputs (Q0-Q7).
   • Ensure /OE is low to enable the outputs.

2. Resetting the Flip-Flops:

   • Set /CLR to low to reset all flip-flops, setting Q0-Q7 to low.
   • Return /CLR to high to allow normal operation.

3. Disabling Outputs:

   • Set /OE to high to place the outputs in a high-impedance state, effectively disconnecting them from the circuit.

Important Notes

• Ensure that the supply voltage (V_CC) is within the specified range to avoid damage to the device.
• Proper decoupling capacitors should be used near the power pins to minimize noise and ensure stable operation.
• The device is sensitive to static electricity; handle with care and use appropriate ESD protection.

This table and the instructions should provide a comprehensive overview of the 74HC273 D-type flip-flop with 3-state outputs.