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74HC166

Specifications

SKU: 908214

BUY 74HC166 https://www.utsource.net/itm/p/908214.html
8-bit parallel-in/serial-out shift register
Parameter Symbol Min Typ Max Unit Notes
Supply Voltage VCC 2.0 - 6.0 V -
Input Voltage (High) VIH - 3.5 VCC V -
Input Voltage (Low) VIL 0 - 1.5 V -
Output Voltage (High) VOH - VCC - 0.1 VCC V -
Output Voltage (Low) VOL 0 0.1 - V -
Input Current (High) IIH - - 1.0 μA -
Input Current (Low) IIL -1.0 - - μA -
Output Current (Source) IOH - - 25 mA -
Output Current (Sink) IOL -25 - - mA -
Propagation Delay Time tpd - 18 40 ns @ VCC = 4.5V, fo = 10 MHz
Power Consumption Ptot - 20 - mW @ VCC = 4.5V, fo = 10 MHz

Instructions for Use

  1. Power Supply:

    • Connect VCC to the positive supply voltage (2.0V to 6.0V).
    • Connect GND to the ground.
  2. Data Input:

    • Connect the data input pin (D) to the source of serial data.
    • Ensure that the input voltage levels are within the specified range for VIH and VIL.
  3. Clock Input:

    • Connect the clock input pin (CP) to the clock signal.
    • The clock signal should be a square wave with a frequency up to 10 MHz.
  4. Shift Register Control:

    • Connect the shift register control pins (SRCLR and SRCLK) to control the operation of the shift register.
    • SRCLR: Active low, clears the shift register.
    • SRCLK: Clocks the data into the shift register on the rising edge.
  5. Output Enable:

    • Connect the output enable pin (OE) to control the output state.
    • OE: Active low, enables the outputs to drive the external circuitry.
  6. Output Pins:

    • The output pins (Q0 to Q7) will provide the parallel data from the shift register.
    • Ensure that the load connected to these pins does not exceed the maximum output current ratings.
  7. Propagation Delay:

    • Consider the propagation delay time when designing the timing of your circuit to ensure proper synchronization.
  8. Power Consumption:

    • Monitor the power consumption to ensure it stays within the specified limits, especially at higher clock frequencies.
  9. Decoupling Capacitors:

    • Place decoupling capacitors (e.g., 100 nF) close to the VCC and GND pins to reduce noise and improve stability.
  10. Handling Precautions:

    • Handle the IC with care to avoid static damage.
    • Store the IC in an anti-static bag when not in use.
(For reference only)

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