Overview
The SN74HC251DE4 is a data selector/multiplexer produced by Texas Instruments. It is part of the SN74HC series and features 3-state outputs, making it versatile for various digital circuit applications. This component is designed to select one of eight data sources using full binary decoding and includes strobe-controlled complementary 3-state outputs. The SN74HC251DE4 operates within a wide voltage range of 2 V to 6 V, making it compatible with a variety of system configurations.
Key Specifications
| Parameter | Value |
|---|---|
| Function | Encoder/Multiplexer |
| Number of Channels | 1 |
| Configuration | 8:1 |
| Operating Temperature Range | -40°C to 85°C |
| Voltage (Nominal) | 3.3 V, 5 V |
| Voltage (Min/Max) | 2 V / 6 V |
| Output Drive (IOL/IOH) (Max) | 7.8 mA / -7.8 mA |
| Propagation Delay (tpd) (Max) | 51 ns |
| ICC @ Nom Voltage (Max) | 0.08 mA |
| Package Type | SOIC |
| Package Size | 9.90 mm x 3.90 mm |
| RoHS Compliance | Yes |
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 that can interface directly with the system bus or drive up to 15 LSTTL loads.
- Low power consumption, with a maximum ICC of 80 μA.
- Typical propagation delay of 9 ns.
- ±6-mA output drive at 5 V.
- Low input current of 1 μA max.
- Capable of performing parallel-to-serial conversion.
- Complementary outputs provide true and inverted data.
Applications
The SN74HC251DE4 is suitable for a variety of digital circuit applications, including:
- Data selection and multiplexing in digital systems.
- Parallel-to-serial conversion.
- Bus interface applications due to its high-current 3-state outputs.
- Low-power digital circuits where minimal current consumption is crucial.
- Systems requiring wide operating voltage ranges.
Q & A
- What is the primary function of the SN74HC251DE4?
The SN74HC251DE4 is a data selector/multiplexer with 3-state outputs, designed to select one of eight data sources using full binary decoding.
- What is the operating voltage range of the SN74HC251DE4?
The operating voltage range is from 2 V to 6 V.
- What types of outputs does the SN74HC251DE4 have?
The device features strobe-controlled complementary 3-state outputs.
- How many LSTTL loads can the SN74HC251DE4 drive?
The high-current 3-state outputs can drive up to 15 LSTTL loads.
- What is the typical propagation delay of the SN74HC251DE4?
The typical propagation delay is 9 ns.
- Is the SN74HC251DE4 RoHS compliant?
Yes, the SN74HC251DE4 is RoHS compliant.
- What is the maximum ICC at nominal voltage?
The maximum ICC at nominal voltage is 0.08 mA.
- What are the dimensions of the SOIC package for the SN74HC251DE4?
The dimensions are 9.90 mm x 3.90 mm.
- Can the SN74HC251DE4 perform parallel-to-serial conversion?
Yes, the device is capable of performing parallel-to-serial conversion.
- What is the maximum output drive at 5 V?
The maximum output drive at 5 V is ±6 mA.
- What is the operating temperature range of the SN74HC251DE4?
The operating temperature range is -40°C to 85°C.
