4-bit D-type Registers with 3-State Output IC - 74HC173
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4-bit D-type Registers with 3-State Output IC - 74HC173 The 74HC Series 74HC173 is a 4-bit register that includes D-type flip-flops featuring totem-pole 3-state outputs capable of driving highly capacitive or relatively low-impedance loads. The high-impedance third state and increased high-logic-level drive provide these flip-flops with the capability of being connected directly to and driving the bus lines in a bus-organized system without the need for interface or pull-up components. Up to 128 of the 74LS173 outputs can be connected to a common bus and still drive two Series 74LS TTL normalized loads, respectively. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output control circuitry is designed so that the average output disable times are shorter than the average output enable times. Gated enable inputs are provided on these devices for controlling the entry of data into the flip-flops. When both data-enable (G1, G2) inputs are low, data at the D inputs are loaded into their respective flip-flops on the next positive transition of the buffered clock input. Gate output-control (M, N) inputs also are provided. When both are low, the normal logic states (high or low levels) of the four outputs are available for driving the loads or bus lines. The outputs are disabled independently from the level of the clock by a high logic level at either output-control input. The outputs then present a high impedance and neither load nor drive the bus line. Detailed operation is given in the function table. The 74LS173 is characterized for operation from 0°C to 70°C. Pinout: Pinout of 74HC173 IC
- 4-bit D-type register with 3-state outputs
- Wide operating voltage: 2V–6V
- Compatible with Arduino, Raspberry Pi, and 5V/3.3V logic
- 16-pin DIP package for easy prototyping
- Edge-triggered clocking with gated data and output control
- High-impedance state prevents bus contention
- Supports bus-oriented systems with tri-state outputs
- Gated enable inputs for controlled data loading
- TTL-compatible inputs
- No external pull-up resistors required for bus driving
- Ideal for data latching, storage, and multiplexing
| Supply Voltage | 4.75 - 5.25 V |
|---|---|
| Operation free-air temperature | -5.2 °C |
| Output Current — High | 16 mA |
| Output Current — Low | 70 µA |
What is the function of the 74HC173 IC?
The 74HC173 is a 4-bit D-type register with 3-state outputs, used for data storage and bus interfacing in digital systems.
Can the 74HC173 be used with Arduino or Raspberry Pi?
Yes, it is compatible with Arduino, Raspberry Pi, and other 3.3V/5V microcontrollers due to its wide voltage range and TTL compatibility.
What does 3-state output mean in this IC?
3-state outputs can be high, low, or high-impedance (disconnected), allowing multiple devices to share a common bus safely.
What is the operating voltage range of 74HC173?
The 74HC173 operates from 2V to 6V, making it suitable for both 3.3V and 5V logic systems.
What is the package type of the 74HC173?
The 74HC173 is available in a 16-pin DIP (Dual In-line Package), ideal for breadboarding and PCB mounting.
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About 4-bit D-type Registers with 3-State Output IC - 74HC173 by Iotcart
Buy 74HC173 IC online. Compatible with Arduino & Raspberry Pi. 3-state outputs, 2V–6V operation. Best price in India.
Categorised under: 74HC IC Series› Integrated Circuits