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872
Electronics Part Number
872-WXManufacturer
Broadcom
872
Description
I2C-driven addressable LED matrix in green colorInventory
755 Pcs New Original In Stock
I2C 8x8 green matrix; 64 LEDs, 40.6x32mm; easy serial driving; for indicators, mini displays, animations.
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Basic cost: USD 70.00
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Technical Specifications
Category
Fiber Optic Receivers
Manufacturer
Broadcom
Packaging
Tube
Series
-
Base Product Number
HFBR-2521
Product Status
Active
Current - Supply
10 mA
Applications
-
Voltage - Supply
4.75V ~ 5.25V
Data Rate
5MBd
Power - Minimum Receivable
-43dBm
Data Sheet Document (D)
Datasheets
Download HFBR-2521Z Product Specification (PDF)
HTML Datasheet
HFBR-2521Z-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8517.62.0090
Additional Information
Other Names
HFBR2521Z 516-2062
Standard Package
40
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Frequently Asked Questions (FAQ)
What are the key reliability risks when using the HFBR-2521Z in industrial environments with tempera
The HFBR-2521Z is rated for standard commercial temperature ranges, but industrial environments with frequent thermal cycling can induce mechanical stress on the fiber optic receiver’s internal bond wires and photodiode assembly. This may lead to intermittent signal loss or premature failure. To mitigate risk, ensure proper PCB layout with minimal thermal mismatch, use conformal coating to reduce moisture ingress (especially given MSL 3 sensitivity), and avoid mounting near high-heat components. Consider derating supply voltage slightly within the 4.75V–5.25V range to reduce junction temperature during extended operation.
Can the HFBR-2521Z be directly replaced with the Avago HFBR-2522Z in an existing 5MBd design without
While the HFBR-2522Z is electrically similar and from the same Broadcom/Avago lineage, it has a different package outline and slightly higher supply current (15 mA vs. 10 mA for the HFBR-2521Z). Direct drop-in replacement is not recommended without verifying PCB footprint compatibility and ensuring the power supply can handle the increased load. Additionally, the HFBR-2522Z has a lower minimum receivable power sensitivity, which may affect link margin in low-light conditions—re-evaluate your optical budget if swapping parts.
How does the HFBR-2521Z perform in high-electrical-noise environments like motor control systems, an
The HFBR-2521Z, while inherently immune to EMI due to its fiber optic interface, still requires careful analog front-end design on the receiver output side. In motor-driven systems, switching transients can couple into the receiver’s power and output lines, causing data errors. Implement a low-pass RC filter (e.g., 100Ω + 100pF) on the output, use a dedicated LDO for the 5V supply with proper decoupling (100nF ceramic close to VCC), and maintain a solid ground plane beneath the device. Avoid routing digital return paths under the HFBR-2521Z to prevent ground bounce interference.
Is it safe to operate the HFBR-2521Z at the upper limit of its supply voltage (5.25V) continuously i
Operating the HFBR-2521Z at 5.25V continuously increases power dissipation and accelerates aging of the internal IC, potentially reducing long-term reliability—especially in always-on applications like medical devices. Although within spec, prolonged operation at maximum voltage raises junction temperature and may shorten mean time between failures (MTBF). For mission-critical designs, operate at 5.0V nominal with tight regulation (±2%) and include thermal monitoring. Also, consider derating guidelines from IEC 60601-1 for medical equipment to ensure compliance and longevity.
What design constraints should I consider when integrating the HFBR-2521Z into a compact PCB with li
The HFBR-2521Z requires a straight-line optical path between the fiber connector and the internal photodiode, so bending or misalignment of the fiber pigtail can severely degrade signal integrity. In tight layouts, avoid sharp bends in the fiber (minimum bend radius >25mm) and ensure the connector housing doesn’t exert mechanical stress on the receiver package. Use strain relief for the fiber cable and maintain at least 3mm clearance above the component for mating/unmating cycles. If space is extremely constrained, evaluate whether a remote-mounted receiver with a flexible fiber run might be more reliable than forcing the HFBR-2521Z into a suboptimal mechanical position.
What are the key reliability risks when using the HFBR-2521Z in industrial environments with tempera
The HFBR-2521Z is rated for standard commercial temperature ranges, but industrial environments with frequent thermal cycling can induce mechanical stress on the fiber optic receiver’s internal bond wires and photodiode assembly. This may lead to intermittent signal loss or premature failure. To mitigate risk, ensure proper PCB layout with minimal thermal mismatch, use conformal coating to reduce moisture ingress (especially given MSL 3 sensitivity), and avoid mounting near high-heat components. Consider derating supply voltage slightly within the 4.75V–5.25V range to reduce junction temperature during extended operation.
Can the HFBR-2521Z be directly replaced with the Avago HFBR-2522Z in an existing 5MBd design without
While the HFBR-2522Z is electrically similar and from the same Broadcom/Avago lineage, it has a different package outline and slightly higher supply current (15 mA vs. 10 mA for the HFBR-2521Z). Direct drop-in replacement is not recommended without verifying PCB footprint compatibility and ensuring the power supply can handle the increased load. Additionally, the HFBR-2522Z has a lower minimum receivable power sensitivity, which may affect link margin in low-light conditions—re-evaluate your optical budget if swapping parts.
How does the HFBR-2521Z perform in high-electrical-noise environments like motor control systems, an
The HFBR-2521Z, while inherently immune to EMI due to its fiber optic interface, still requires careful analog front-end design on the receiver output side. In motor-driven systems, switching transients can couple into the receiver’s power and output lines, causing data errors. Implement a low-pass RC filter (e.g., 100Ω + 100pF) on the output, use a dedicated LDO for the 5V supply with proper decoupling (100nF ceramic close to VCC), and maintain a solid ground plane beneath the device. Avoid routing digital return paths under the HFBR-2521Z to prevent ground bounce interference.
Is it safe to operate the HFBR-2521Z at the upper limit of its supply voltage (5.25V) continuously i
Operating the HFBR-2521Z at 5.25V continuously increases power dissipation and accelerates aging of the internal IC, potentially reducing long-term reliability—especially in always-on applications like medical devices. Although within spec, prolonged operation at maximum voltage raises junction temperature and may shorten mean time between failures (MTBF). For mission-critical designs, operate at 5.0V nominal with tight regulation (±2%) and include thermal monitoring. Also, consider derating guidelines from IEC 60601-1 for medical equipment to ensure compliance and longevity.
What design constraints should I consider when integrating the HFBR-2521Z into a compact PCB with li
The HFBR-2521Z requires a straight-line optical path between the fiber connector and the internal photodiode, so bending or misalignment of the fiber pigtail can severely degrade signal integrity. In tight layouts, avoid sharp bends in the fiber (minimum bend radius >25mm) and ensure the connector housing doesn’t exert mechanical stress on the receiver package. Use strain relief for the fiber cable and maintain at least 3mm clearance above the component for mating/unmating cycles. If space is extremely constrained, evaluate whether a remote-mounted receiver with a flexible fiber run might be more reliable than forcing the HFBR-2521Z into a suboptimal mechanical position.
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Sep 15 2026
