Overview
The SN74LS247NE4 is a BCD-to-Seven-Segment Decoder/Driver produced by Texas Instruments. This component is part of the 74LS series, known for its low power consumption and compatibility with TTL logic outputs. It is designed to convert Binary Coded Decimal (BCD) inputs into seven-segment display outputs, making it suitable for various display applications. The SN74LS247NE4 is electrically and functionally identical to the SN54LS47 and SN74LS47, offering designers flexibility in their designs.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | PDIP (N) |
| Number of Pins | 16 |
| Operating Temperature Range (°C) | 0 to 70 |
| Supply Voltage (V) | 4.75 to 5.25 |
| Output Type | Active-Low Outputs |
| Lamp Test Provision | Yes |
| Leading/Trailing Zero Suppression | Yes |
| Internal Pull-Ups | Yes |
Key Features
- Open-Collector Outputs: Drive indicators directly.
- Lamp-Test Provision: Allows for lamp testing at any time when the BI/RBO node is at a high level.
- Leading/Trailing Zero Suppression: Automatic leading and/or trailing-edge zero-blanking control.
- Internal Pull-Ups: Eliminate the need for external resistors.
- Lamp Intensity Modulation Capability: Feature available in all circuit types.
- TTL Logic Compatibility: Inputs and outputs are entirely compatible with TTL logic outputs.
Applications
The SN74LS247NE4 is commonly used in various display systems, including digital clocks, calculators, and other electronic devices that require BCD-to-seven-segment decoding. It is particularly useful in applications where direct driving of seven-segment displays is necessary and where lamp testing and zero suppression are required.
Q & A
- What is the primary function of the SN74LS247NE4? The primary function is to convert BCD inputs into seven-segment display outputs.
- What is the operating temperature range of the SN74LS247NE4? The operating temperature range is from 0°C to 70°C.
- What type of outputs does the SN74LS247NE4 have? The SN74LS247NE4 has active-low outputs.
- Does the SN74LS247NE4 support lamp testing? Yes, it has a lamp-test provision.
- Is the SN74LS247NE4 compatible with TTL logic outputs? Yes, it is entirely compatible with TTL logic outputs.
- What is the purpose of the internal pull-ups in the SN74LS247NE4? The internal pull-ups eliminate the need for external resistors.
- Can the SN74LS247NE4 be used in military temperature ranges? No, it is characterized for operation from 0°C to 70°C, not the full military temperature range.
- What is the package type of the SN74LS247NE4? The package type is PDIP (N) with 16 pins.
- Does the SN74LS247NE4 support leading/trailing zero suppression? Yes, it has automatic leading and/or trailing-edge zero-blanking control.
- Can the SN74LS247NE4 be used interchangeably with other similar components? Yes, it is electrically and functionally identical to the SN54LS47 and SN74LS47.
