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HCPL-0721
Broadcom Limited
OPTOISO 3.75KV PUSH PULL 8SO
1392 Pcs New Original In Stock
Logic Output Optoisolator 25MBd Push-Pull, Totem Pole 3750Vrms 1 Channel 10kV/µs CMTI 8-SO Tall
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5.0 / 5.0
- (243 Ratings)
HCPL-0721
Product Overview
6451844
DiGi Electronics Part Number
HCPL-0721-DGManufacturer
Broadcom Limited
HCPL-0721
Description
OPTOISO 3.75KV PUSH PULL 8SOInventory
1392 Pcs New Original In Stock
Logic Output Optoisolator 25MBd Push-Pull, Totem Pole 3750Vrms 1 Channel 10kV/µs CMTI 8-SO Tall
Quantity
Minimum 1
Minimum 1
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HCPL-0721 Technical Specifications
Category
Optoisolators, Logic Output Optoisolators
Packaging
Tube
Series
-
Product Status
Active
Number of Channels
1
Inputs - Side 1/Side 2
1/0
Voltage - Isolation
3750Vrms
Common Mode Transient Immunity (Min)
10kV/µs
Input Type
Logic
Output Type
Push-Pull, Totem Pole
Current - Output / Channel
10 mA
Data Rate
25MBd
Propagation Delay tpLH / tpHL (Max)
40ns, 40ns
Rise / Fall Time (Typ)
9ns, 8ns
Voltage - Forward (Vf) (Typ)
-
Current - DC Forward (If) (Max)
-
Voltage - Supply
4.5V ~ 5.5V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SO Tall
Base Product Number
HCPL-0721
Datasheet & Documents
HTML Datasheet
HCPL-0721-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Other Names
HCPL0721
516-1111-5
Standard Package
100
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
최고의 고객 서비스와 품질을 경험할 수 있는 곳입니다.
December 02, 2025
Les produits de DiGi Electronics offrent une qualité sonore et de fabrication remarquable. J'apprécie leur précision et leur fiabilité, parfaits pour mes projets professionnels.
December 02, 2025
Choosing DiGi Electronics means supporting a brand that values affordability and eco-responsibility.
December 02, 2025
Super fast shipping and support staff that was both professional and friendly.
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Frequently Asked Questions (FAQ)
Can the HCPL-0721 optoisolator safely replace a slower 10MBd isolator like the HCPL-2630 in a high-speed digital communication interface without risking signal integrity or timing violations?
Yes, the HCPL-0721 can replace the HCPL-2630 in most 10MBd applications due to its faster 25MBd data rate and lower propagation delay (40ns max vs. ~75ns for HCPL-2630), but you must verify that the receiving logic’s setup/hold times are compatible with the HCPL-0721’s tighter timing margins. Its push-pull output also provides stronger drive than the open-collector HCPL-2630, reducing rise/fall time uncertainty—however, ensure your system doesn’t rely on pull-up resistors or wired-OR configurations, which are incompatible with totem-pole outputs. Always validate signal integrity with an oscilloscope under worst-case load conditions.
What are the key reliability risks when using the HCPL-0721 in industrial motor control circuits with high dV/dt switching transients, and how can I mitigate them despite its 10kV/µs CMTI rating?
While the HCPL-0721’s 10kV/µs common-mode transient immunity (CMTI) is robust, real-world motor drives often exhibit localized ground bounce and high-frequency ringing that exceed datasheet test conditions. To mitigate risk, maintain tight PCB layout symmetry between input and output grounds, use a solid ground plane, and place a 100nF ceramic capacitor within 5mm of the VCC pin. Avoid routing high-current PWM traces near the isolator’s input side. If your system operates near the 10kV/µs limit consistently, consider adding a small RC filter (e.g., 100Ω + 10pF) on the input to attenuate high-frequency noise without degrading signal fidelity at 25MBd.
Is it safe to parallel two HCPL-0721 channels (if available) or substitute it with a dual-channel isolator like the ACPL-217 for higher current drive in a fault-tolerant design?
The HCPL-0721 is a single-channel device, so paralleling isn’t possible—and even if it were, totem-pole outputs like its push-pull stage must never be paralleled due to potential shoot-through currents during state transitions. For higher drive or redundancy, use a dedicated dual-channel isolator such as the ACPL-217 (also from Broadcom), but note that the ACPL-217 has a slower data rate (10MBd) and different pinout. If your application requires both high speed and redundancy, consider using two separate HCPL-0721 devices with independent enable logic and validate cross-channel skew under dynamic loading to ensure synchronized operation.
How does the HCPL-0721’s non-RoHS status impact its long-term usability in new designs targeting global markets, and are there compliant drop-in alternatives with similar performance?
The HCPL-0721’s non-RoHS compliance (due to lead-based solder) may restrict its use in EU or other RoHS-mandated regions unless your product qualifies for an exemption (e.g., industrial control equipment under Annex III). For new designs, Broadcom’s ACPL-M71T is a RoHS-compliant, pin-compatible alternative with nearly identical specs: 25MBd, 3.75kV isolation, 10kV/µs CMTI, and 8-SOIC packaging. However, verify supply voltage tolerance—the ACPL-M71T supports 3.3V operation, which may affect interface compatibility if your system is strictly 5V. Always update your BOM and compliance documentation when substituting.
What thermal and layout considerations are critical when mounting the HCPL-0721 in a densely populated PCB with adjacent high-power components operating near its 85°C limit?
The HCPL-0721’s MSL-1 rating allows unlimited floor life, but thermal stress near its 85°C maximum junction temperature can degrade long-term isolation performance and LED efficiency. Maintain at least 3mm clearance from heat sources (e.g., power MOSFETs, regulators) and avoid placing it under shielded cans or in enclosed zones with poor airflow. Use thermal vias under the ground pad if exposed, but ensure they don’t compromise creepage distance (>8mm recommended for 3.75kV). Monitor case temperature during burn-in; if it exceeds 70°C, consider reducing ambient load or selecting a higher-temp-grade isolator like the HCPL-0721-000E (extended temp variant), though verify availability and cost trade-offs.
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.
HCPL-0721 CAD Models
Broadcom Limited HCPL-0721 PCB symbols & footprints
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