Overview
The SN74HC251DR is a data selector/multiplexer integrated circuit produced by Texas Instruments. It belongs to the 74HC family of CMOS logic ICs, known for their high-speed operation and low power consumption. This device is designed to select one of eight data sources and features strobe-controlled complementary 3-state outputs, making it suitable for various digital logic applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2 to 6 | V |
| Pin Count | 16 | - |
| Package Type | SOIC | - |
| Dimensions | 9.9 x 3.91 x 1.58 | mm |
| Minimum Operating Temperature | -40 | °C |
| Maximum Operating Temperature | +85 | °C |
| Typical Propagation Delay (tpd) | 9 ns (at VCC = 5 V) | ns |
| Output Drive Current | ±6 mA (at VCC = 5 V) | mA |
| Input Current | 1 μA max | μA |
| Power Consumption (ICC) | 80 μA max | μA |
Key Features
- 3-state version of the 'HC151, with strobe-controlled complementary 3-state outputs.
- Wide operating voltage range of 2 V to 6 V.
- High-current 3-state outputs capable of driving up to 15 LSTTL loads.
- Low power consumption, with a maximum ICC of 80 μA.
- Typical propagation delay of 9 ns at VCC = 5 V.
- Complementary outputs providing true and inverted data.
- Ability to perform parallel-to-serial conversion.
Applications
The SN74HC251DR is versatile and can be used in a variety of digital logic applications, including:
- Bus-organized systems where the 3-state outputs can interface directly with system buses.
- Data selection and multiplexing in digital circuits.
- Parallel-to-serial conversion in communication systems.
- General-purpose logic circuits requiring high-speed and low power consumption.
Q & A
- What is the operating voltage range of the SN74HC251DR?
The operating voltage range is from 2 V to 6 V. - How many pins does the SN74HC251DR have?
The SN74HC251DR has 16 pins. - What is the package type of the SN74HC251DR?
The package type is SOIC (Small Outline Integrated Circuit). - What are the dimensions of the SN74HC251DR?
The dimensions are 9.9 mm x 3.91 mm x 1.58 mm. - What is the typical propagation delay of the SN74HC251DR at VCC = 5 V?
The typical propagation delay is 9 ns. - How much current can the outputs drive at VCC = 5 V?
The outputs can drive up to ±6 mA at VCC = 5 V. - What is the maximum input current of the SN74HC251DR?
The maximum input current is 1 μA. - What is the maximum power consumption (ICC) of the SN74HC251DR?
The maximum power consumption is 80 μA. - Can the SN74HC251DR perform parallel-to-serial conversion?
Yes, it can perform parallel-to-serial conversion. - What are the minimum and maximum operating temperatures of the SN74HC251DR?
The minimum operating temperature is -40°C, and the maximum operating temperature is +85°C.
