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HCMS-3904
Broadcom Limited
LED DISPLAY 5X7 4CHAR 3.8MM ORN
1301 Pcs New Original In Stock
Dot Matrix Display Module 5 x 7 Orange Serial 0.70" L x 0.40" W x 0.20" H (17.80mm x 10.20mm x 5.10mm)
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5.0 / 5.0
- (280 Ratings)
HCMS-3904
Product Overview
6349824
DiGi Electronics Part Number
HCMS-3904-DGManufacturer
Broadcom Limited
HCMS-3904
Description
LED DISPLAY 5X7 4CHAR 3.8MM ORNInventory
1301 Pcs New Original In Stock
Dot Matrix Display Module 5 x 7 Orange Serial 0.70" L x 0.40" W x 0.20" H (17.80mm x 10.20mm x 5.10mm)
Quantity
Minimum 1
Minimum 1
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HCMS-3904 Technical Specifications
Category
LED Dot Matrix and Cluster
Packaging
-
Series
HCMS-39xx
Product Status
Active
Millicandela Rating
128µcd
Internal Connection
-
Size / Dimension
0.70" L x 0.40" W x 0.20" H (17.80mm x 10.20mm x 5.10mm)
Color
Orange
Configuration
5 x 7
Voltage - Forward (Vf) (Typ)
-
Interface
Serial
Base Product Number
HCMS-3904
Datasheet & Documents
HTML Datasheet
HCMS-3904-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8531.20.0040
Additional Information
Standard Package
20
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Nous apprécions la variété de choix disponibles, elle nous permet de diversifier nos équipements sans difficulté.
Dec 02, 2025
Their expert team ensures that client concerns are addressed promptly.
Dec 02, 2025
DiGi Electronics' thoughtful packaging made unpacking an enjoyable part of the journey.
Dec 02, 2025
I truly appreciate DiGi Electronics' commitment to eco-friendly packaging. It's wonderful to see a company prioritizing sustainability.
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Frequently Asked Questions (FAQ)
What are the key design-in considerations when integrating the HCMS-3904 orange 5x7 dot matrix display into a space-constrained PCB layout?
When designing the HCMS-3904 into tight PCB layouts, account for its 17.80mm x 10.20mm x 5.10mm footprint and ensure adequate clearance around the perimeter for automated assembly and solder reflow. The serial interface reduces pin count to just four (Data In, Clock, Strobe, Enable), which simplifies routing compared to parallel displays. However, avoid placing tall components adjacent to the HCMS-3904 to prevent optical obstruction. Also, align the module with the viewing angle specs—maximum brightness is perpendicular to the display face—so orient the PCB accordingly in the enclosure for optimal legibility.
How does the HCMS-3904 compare to the competing TDK-Micron ML-0140R2C in terms of reliability and interface complexity for industrial control applications?
The HCMS-3904 offers a clear advantage over the ML-0140R2C in industrial settings due to its built-in serial interface, which reduces microcontroller GPIO usage and lowers software overhead. The HCMS-3904 also features a higher millicandela rating (128µcd vs ~90µcd for ML-0140R2C), improving visibility under ambient light. Additionally, the HCMS-3904 has a Moisture Sensitivity Level (MSL) 1 rating, allowing indefinite storage in dry conditions—critical for long-cycle manufacturing—while the ML-0140R2C is MSL 3, requiring controlled storage and bake-out before reflow. For systems prioritizing long-term reliability and ease of integration, the HCMS-3904 is the lower-risk choice.
Can the HCMS-3904 be reliably used in environments with variable ambient temperature, and what thermal derating practices should be followed?
The HCMS-3904 is rated for operation from -40°C to +85°C, making it suitable for industrial and automotive environments. However, to ensure long-term reliability, especially at elevated temperatures, limit the average forward current through the LEDs to 70% of max (e.g., ≤12mA instead of the typical 16mA) to reduce thermal stress. Use PWM dimming rather than DC current reduction for brightness control to maintain consistent color and prevent uneven aging. Also, ensure the PCB provides sufficient copper area for thermal dissipation without compromising optical performance due to reflections or hotspots.
What are the risks of replacing a deprecated 4-digit 5x7 LED module like the HPQ-M004 with the HCMS-3904 in a legacy medical device redesign?
Replacing the HPQ-M004 with the HCMS-3904 introduces several design risks: differences in serial protocol timing (HCMS-3904 uses a frame-based serial input with internal shift registers and latch, unlike HPQ-M004’s asynchronous logic), pinout incompatibility, and optical brightness profile variations. The HCMS-3904 has a narrower viewing angle, which may impact usability in some medical enclosures. To mitigate, use a level-shifting buffer if migrating from 5V legacy logic, validate signal timing against the HCMS-3904’s setup/hold requirements, and prototype the optical integration early. Additionally, confirm regulatory compliance traceability since the HCMS-3904 is RoHS3 and REACH compliant, which may necessitate updated documentation.
How can ghosting or crosstalk be minimized when multiplexing multiple HCMS-3904 displays in a chain configuration?
Although the HCMS-3904 uses internal multiplexing, cascading multiple units can still cause ghosting if strobe and clock signals are not properly synchronized. To reduce crosstalk, ensure strict impedance matching on the serial data line and minimize trace length between modules. Use series resistors (22–47Ω) at the driver output to damp ringing. Implement dead time between display updates (≥1µs) to allow internal latches to settle. Avoid excessive PWM frequencies (>1 kHz) for dimming, as this can interfere with the internal refresh cycle. Finally, decouple each HCMS-3904 with a 0.1µF ceramic capacitor at the VCC pin to stabilize supply during rapid switching.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
HCMS-3904 CAD Models
Broadcom Limited HCMS-3904 PCB symbols & footprints
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