Overview
The NXP 74HC4511N,652 is a BCD (Binary-Coded Decimal) to 7-segment latch/decoder/driver integrated circuit designed for driving various types of displays, including LED, incandescent, fluorescent, LCD, and gas discharge displays. This device is part of the 74HC family and is known for its versatility and efficiency in display control. Although the specific part number 74HC4511N,652 is obsolete and no longer manufactured, its functionality and features remain relevant for understanding BCD to 7-segment conversion and display driving.
Key Specifications
| Parameter | Description |
|---|---|
| Supply Voltage (VCC) | 2.0 V to 6.0 V |
| Logic Switching Levels | CMOS |
| Output Drive Capability | 10 mA per output |
| Propagation Delay (tpd) | 28 ns |
| Operating Temperature Range | -40 °C to +125 °C |
| Package Type | SO16 (SOT109-1) |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V |
Key Features
- Latch storage of BCD inputs, allowing the display to remain stable even when the input data changes.
- Blanking input (BI) for controlling display blanking.
- Lamp test input (LT) for testing the display by forcing all segment outputs high.
- Supports driving common cathode displays with a guaranteed 10 mA drive capability per output.
- Compliance with JEDEC standard no. 7A.
- Low power dissipation and high noise immunity.
- Inputs include clamp diodes, enabling the use of current limiting resistors to interface inputs to voltages in excess of VCC.
Applications
The 74HC4511N,652 is designed to meet the needs of a wide range of display applications, including digital clocks, electronic meters, and other devices that require numerical output to be shown to the user. It is particularly useful in scenarios where stable and reliable display driving is crucial, such as in industrial control panels, medical devices, and consumer electronics.
Q & A
- What is the primary function of the 74HC4511N,652?
The primary function is to convert binary-coded decimal (BCD) input data into signals that can drive 7-segment displays.
- What types of displays can the 74HC4511N,652 drive?
The device can drive LED, incandescent, fluorescent, LCD, and gas discharge displays.
- What is the supply voltage range for the 74HC4511N,652?
The supply voltage range is from 2.0 V to 6.0 V.
- What is the output drive capability of the 74HC4511N,652?
The device has a guaranteed 10 mA drive capability per output.
- What are the key inputs of the 74HC4511N,652?
The key inputs include four BCD inputs (A, B, C, D), a latch enable input (LE), a ripple blanking input (BI), and a lamp test input (LT).
- How does the latch enable input (LE) function?
When LE is LOW, the segment outputs are determined by the data on A to D. When LE goes HIGH, the last data present on A to D are stored in the latches, keeping the segment outputs stable.
- What is the purpose of the blanking input (BI) and lamp test input (LT)?
The BI input forces all segment outputs LOW when it is LOW, and the LT input forces all segment outputs HIGH when it is LOW, independent of other input conditions.
- Is the 74HC4511N,652 still in production?
No, the 74HC4511N,652 is obsolete and no longer manufactured.
- What package type is the 74HC4511N,652 available in?
The device is available in an SO16 (SOT109-1) package.
- What are the ESD protection levels for the 74HC4511N,652?
The device has HBM ESD protection exceeding 2000 V and CDM ESD protection exceeding 1000 V.
