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HDLG-2416 from HP

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HDLG-2416

Manufacturer: HP, Agilent, MALAYSIA

Four Character 5.0 mm (0.2 inch) Smart 5 x 7 Alphanumeric Displays

Partnumber Manufacturer Quantity Availability
HDLG-2416,HDLG2416 HP, Agilent, MALAYSIA 205 In Stock

Description and Introduction

Four Character 5.0 mm (0.2 inch) Smart 5 x 7 Alphanumeric Displays The HDLG-2416 is a high-performance electronic component widely used in digital display applications. As a 4-digit, 16-segment alphanumeric display module, it offers enhanced readability and versatility compared to traditional 7-segment displays. Its 16-segment architecture allows for the clear representation of letters, numbers, and symbols, making it ideal for applications requiring detailed character rendering.  

Constructed with LED technology, the HDLG-2416 provides bright, energy-efficient illumination with excellent visibility in various lighting conditions. It features a compact design, making it suitable for integration into industrial control panels, instrumentation, medical devices, and consumer electronics. The module supports multiplexing, reducing the number of required control pins and simplifying circuit design.  

With a common anode or cathode configuration, the HDLG-2416 ensures compatibility with different driving circuits. Its robust build ensures durability in demanding environments, while its low power consumption enhances efficiency. Engineers and designers favor this component for its reliability, ease of use, and ability to display complex characters without additional decoding hardware.  

Whether used in digital clocks, measurement equipment, or informational displays, the HDLG-2416 delivers precise and legible output, making it a preferred choice for applications requiring clear and dynamic alphanumeric presentation.

Application Scenarios & Design Considerations

Four Character 5.0 mm (0.2 inch) Smart 5 x 7 Alphanumeric Displays# Technical Documentation: HDLG2416 LED Display Module

## 1. Application Scenarios

### 1.1 Typical Use Cases
The HDLG2416 is a 5x7 dot matrix LED display module designed for alphanumeric character display applications. Each module contains four independent 5x7 character positions with integrated decoder/driver circuitry, making it suitable for applications requiring clear, readable text output without complex external driving electronics.

 Primary Applications: 
-  Industrial Control Panels : Displaying status codes, error messages, and operational parameters in manufacturing equipment, HVAC systems, and process control interfaces
-  Medical Devices : Showing measurement values, mode indicators, and status information on patient monitors, diagnostic equipment, and laboratory instruments
-  Consumer Electronics : Character display in audio equipment, home appliances, and fitness devices where simple text output is required
-  Telecommunications : Status indicators and diagnostic displays in networking equipment, PBX systems, and communication devices
-  Test and Measurement : Readout displays for multimeters, oscilloscopes, and calibration equipment

### 1.2 Industry Applications
 Automotive Industry : Used in aftermarket car audio systems, diagnostic tools, and accessory displays where environmental durability is required.

 Industrial Automation : Implementation in PLC interfaces, HMI panels, and equipment status displays where reliability under varying temperature and voltage conditions is critical.

 Aerospace and Defense : Limited use in non-critical status displays where simple, reliable character output is needed with minimal component count.

 Retail and Point-of-Sale : Price displays, transaction information panels, and inventory management system interfaces.

### 1.3 Practical Advantages and Limitations

 Advantages: 
-  Integrated Design : Combines LED matrix, character decoder, and driver circuitry in a single package, reducing component count and PCB complexity
-  High Visibility : Bright red LED output with excellent viewing angles suitable for various lighting conditions
-  Simple Interface : Parallel ASCII input simplifies microcontroller interfacing compared to raw LED matrix control
-  Low Power Consumption : Typical operation at 20-30mA per segment, suitable for battery-powered applications
-  Wide Operating Temperature : Typically -40°C to +85°C, allowing use in harsh environments
-  Compact Form Factor : Four characters in a single package saves board space compared to discrete 7-segment displays

 Limitations: 
-  Fixed Character Set : Limited to predefined alphanumeric characters (typically ASCII subset), restricting display flexibility
-  Monochromatic Output : Only available in single color (typically red), limiting design options for color-coded interfaces
-  Resolution Constraints : 5x7 dot matrix provides limited character resolution, affecting readability of complex symbols
-  Refresh Rate Limitations : May exhibit flicker in multiplexed configurations or when driven at marginal voltage levels
-  Legacy Interface : Parallel ASCII interface may not be optimal for modern microcontrollers with limited I/O pins

## 2. Design Considerations

### 2.1 Common Design Pitfalls and Solutions

 Pitfall 1: Insufficient Current Limiting 
*Problem*: Direct connection to microcontroller pins without current limiting resistors can damage both the HDLG2416 and the driving microcontroller.
*Solution*: Implement appropriate series resistors on data lines. Calculate using R = (Vcc - Vf - Voh) / I_f, where Vf is LED forward voltage (typically 1.8-2.2V), Voh is microcontroller output high voltage, and I_f is desired LED current (typically 10-20mA).

 Pitfall 2: Inadequate Power Supply Decoupling 
*Problem*: Display flicker or erratic behavior due to power supply noise, especially during character updates.
*Solution*: Place 100nF ceramic capacitor within 10mm of Vcc pin and 10μF electrolytic capacitor near the module power entry point.

 Pitfall

Alternative Part Number

  • HDSP-2112 --: Same 5x7 dot-matrix smart alphanumeric display family lineage from the original HP optoelectronics line, now produced by Broadcom; pin and function compatible for most HDLG-2416 sockets.
  • TLC5926 --: Constant-current LED display driver commonly used to replace the integrated driver logic in HDLG-2416 based designs; widely available and well documented for dot-matrix display control.
  • LTP-3057AC --: 5x7 dot-matrix alphanumeric display with similar form factor and electrical characteristics, offering a lower-cost drop-in style replacement when exact HP compatibility is not mandatory.
  • LTM-8647AC --: Four-digit seven-segment LED display with similar 0.4-inch character height and common-cathode configuration, widely available as a direct form-fit replacement.
  • HDSP-5503 --: Agilent/Hewlett-Packard heritage seven-segment display family with matching digit height and pinout, offering electrical and mechanical compatibility.
  • DA04-11EWA --: Four-digit seven-segment LED display with comparable size and drive characteristics, suitable as a lower-cost alternative with similar footprint.
  • LTP-305G --: 5x7 dot matrix LED display with comparable matrix size and drive requirements, suitable as a drop-in style replacement.
  • TA07-11GWA --: 5x7 dot matrix LED display offering similar electrical and optical characteristics for alphanumeric display use.

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