Description
16×2 Character LCD Module STN+ Gray Display with yellow-green Backlight Display for Arduino
The HTM1602A-01Y-A5P is a standard 16×2 Character LCD featuring 16 characters per line across 2 lines. It utilizes STN yellow-green film, positive display, and transflective technology, offering high contrast, a wide viewing angle, and low power consumption. Designed to meet industrial-grade standards, the module supports an operating temperature range of -20℃ to 70℃, making it suitable for embedded systems and human-machine interfaces in complex environments.This Arduino-compatible monitor comes with an ST7066U controller, providing a great viewing experience and performance at an affordable price.
This product adopts a 16-pin parallel interface and supports a standard HD44780 or compatible controller. The instruction set is mature, enabling low-development-barrier integration with a wide range of MCU platforms. The yellow-green LED backlight ensures clear visibility in low-light or nighttime conditions. The module features a compact design with overall dimensions of 80.0mm*36.0mm and an active display area of 64.5mm*16.0mm. The character dot matrix is 5*8, delivering clear and well-organized display output.
The 16×2 Character LCD is designed with industrial stability and reliability in mind. The PCB has a thickness of 1.6mm, with a pin pitch of 2.54mm, supporting standard pin headers or sockets for easy integration and mass production. The backlight circuit uses a parallel LED structure, simplifying drive requirements and enabling controllable power consumption, making it suitable for battery-powered or low-power systems.
Specification of the 16×2 Character LCD Module
16×2 Character LCD Product Highlights
- High-Reliability Industrial-Grade Design
The module operates between -20℃and 70℃and can be stored between -30℃and 80℃ , meeting the stringent requirements of most industrial environments. The dual-layer PCB layout optimizes critical signal routing for enhanced noise immunity, ensuring stable operation in electromagnetically complex equipment.
- High-Contrast STN Yellow-Green Display
Compared to traditional TN displays, STN technology offers higher contrast and a wider viewing angle. The 16×2 Character LCD yellow-green background with black characters provides a visually comfortable experience, reducing eye strain during prolonged use. The transflective structure ensures clear visibility under sunlight without backlight activation, making it suitable for both outdoor and indoor applications.
- Standard Parallel Interface for Easy Development
The module uses a standard 16-pin parallel interface compatible with the HD44780 protocol, supporting both 4-bit and 8-bit data transfer modes. This protocol has been the de facto standard for character LCDs since the 1980s, allowing developers to quickly get started with abundant open-source libraries and code examples that significantly shorten development cycles.
- Flexible Backlight Design with Controllable Power Consumption
The backlight features a parallel LED structure with a typical driving voltage of 3.0V and moderate current draw, supporting PWM dimming. Users can flexibly control backlight activation or brightness based on application needs, achieving a balance between power consumption and display performance in portable devices.
- Compact Structure and Easy Mounting
With overall dimensions of 80.0mm*36.0mm and an active display area of 64.5mm*16.0mm, the PCB includes four mounting holes of 2.8mm in diameter for easy attachment to equipment panels using standoffs or screws. The pin pitch is a standard 2.54mm, compatible with perforated boards, female headers, pin headers, and other connection methods.
Application Scenarios
- Industrial Automation Equipment
In industrial control, the 16×2 Character LCD is often used as a human-machine interface to display equipment status, operating parameters, alarm information, and more. Its wide operating temperature range (-20℃to 70°C) ensures stable operation in factories, warehouses, and outdoor settings with significant temperature variations, while the high-contrast STN yellow-green screen maintains excellent visibility even under strong light.
- Medical Instruments and Testing Equipment
Medical devices require low power consumption, high reliability, and clear information presentation. The transflective design of this 16×2 Character LCD enables clear display in both natural light and backlit conditions, making it suitable for portable monitors, analytical instruments, physiotherapy equipment, and other medical applications that demand display stability and noise immunity.
- Smart Meters and Measurement Devices
This module is widely used in smart electric meters, water meters, gas meters, environmental monitors, and similar devices. Its standard instruction set and parallel interface enable rapid integration with mainstream MCUs. Combined with the low-power backlight design, it supports extended standby operation, making it ideal for battery-powered measurement terminals.
- Household Appliances and Consumer Electronics
In high-end home appliances, smart home control panels, and embedded DIY projects, this 16×2 Character LCD has become a preferred display component for developers and engineers due to its mature technology ecosystem and excellent cost-performance ratio. The yellow-green backlight provides clear visibility without glare during nighttime use, enhancing the user experience.
Technical Q&A
Q1: What is the display principle of the 16×2 Character LCD, and why was STN technology chosen?
A: This module uses STN liquid crystal display technology. STN increases the twist angle of liquid crystal molecules to 180°–270°, achieving higher contrast and a wider viewing angle. Compared to traditional TN displays, STN delivers clearer character rendering, making it especially suitable for character screens with moderate information density. Additionally, the module features a transflective design that allows it to operate using reflected ambient light or transmitted backlight, balancing low power consumption with all-weather visibility.
Q2: Does this 16×2 Character LCD support direct driving by a 3.3V MCU?
A: Yes. The HTM1602A-01Y-A5P has a typical operating voltage of 3.0V, and its logic levels are compatible with 3.3V MCUs. In practice, it is recommended to configure the MCU’s I/O pins as push-pull outputs and ensure proper power-on sequencing to stabilize the LCD controller before initialization. If 5V devices are present in the system, level-shifting circuits are recommended to enhance system stability.
Q3: How can the backlight be controlled for low-power applications?
A: The backlight uses a parallel yellow-green LED structure with a typical driving voltage of 3.0V. In low-power applications, an MCU GPIO can control an NPN transistor or MOSFET to switch the backlight power, or a PWM signal can be used for brightness adjustment. In standby mode, the backlight can be turned off completely, allowing the module to operate in transflective mode with power consumption reduced to milliwatt levels, making it suitable for battery-powered devices.
