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FOD0720R2 Equivalent & Substitute Parts
Part Overview
The FOD0720R2 is a logic output optoisolator manufactured by onsemi, featuring 3750Vrms isolation voltage, push-pull totem pole output configuration, and 25Mbps data rate capability. This single-channel device operates across 4.5V to 5.5V supply range with 20kV/µs common mode transient immunity in an 8-SOIC surface mount package. The part is active and in production status with 3720 units currently in stock. Equivalent and substitute parts are identified based on matching isolation voltage, output type, channel configuration, and electrical performance parameters that maintain functional compatibility in circuit applications.
Substiute Parts
Key Parameters
| Parameter | FOD0720R2 Value |
|---|---|
| Manufacturer | onsemi |
| Number of Channels | 1 |
| Voltage - Isolation | 3750Vrms |
| Output Type | Push-Pull, Totem Pole |
| Input Type | Logic |
| Data Rate | 25Mbps |
| Common Mode Transient Immunity (Min) | 20kV/µs |
| Current - Output / Channel | 10 mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 100°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the FOD0720R2 are grouped based on the following critical parameters that determine functional compatibility:
Primary Matching Criteria:
- Voltage - Isolation: 3750Vrms (mandatory)
- Number of Channels: 1 (mandatory)
- Output Type: Push-Pull, Totem Pole (mandatory)
- Input Type: Logic (mandatory)
- Package / Case: 8-SOIC (0.154", 3.90mm Width) (mandatory)
- Mounting Type: Surface Mount (mandatory)
- Current - Output / Channel: 10 mA (mandatory)
Secondary Performance Criteria:
- Data Rate: 25Mbps or lower (FOD0720R2 operates at 25Mbps; lower rates are acceptable)
- Common Mode Transient Immunity: 10kV/µs or higher (FOD0720R2 specifies 20kV/µs minimum)
- Propagation Delay: 40ns maximum for both tpLH and tpHL
- Operating Temperature Range: Must encompass or exceed -40°C to 100°C
Packaging and Compliance:
- RoHS3 Compliant status preferred for new designs
- MSL 1 (Unlimited) for moisture sensitivity
Substitute parts are divided into two functional groups: ACPL-072L series (Broadcom, 25MBd data rate with extended supply voltage range 3V-3.6V and 4.5V-5.5V) and HCPL-07xx series (Broadcom, with variants at 25MBd and 12.5MBd data rates). All substitutes maintain the 3750Vrms isolation, single-channel configuration, and 8-SOIC package form factor.
Parameter Comparison
| Parameter | FOD0720R2 | ACPL-072L-000E | ACPL-072L-500E | ACPL-072L-560E | HCPL-0710-000E | HCPL-0710-500E | HCPL-0710-560E | HCPL-0720-000E | HCPL-0720-500E |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Isolation | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms |
| Output Type | Push-Pull, Totem Pole | Push-Pull, Totem Pole | Push-Pull, Totem Pole | Push-Pull, Totem Pole | Push-Pull, Totem Pole | Push-Pull, Totem Pole | Push-Pull, Totem Pole | Push-Pull, Totem Pole | Push-Pull, Totem Pole |
| Input Type | Logic | Logic | Logic | Logic | Logic | Logic | Logic | Logic | Logic |
| Data Rate | 25Mbps | 25MBd | 25MBd | 25MBd | 12.5MBd | 12.5MBd | 12.5MBd | 25MBd | 25MBd |
| Common Mode Transient Immunity (Min) | 20kV/µs | 10kV/µs | 10kV/µs | 10kV/µs | 10kV/µs | 10kV/µs | 10kV/µs | 10kV/µs | 10kV/µs |
| Current - Output / Channel | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA | 10 mA |
| Propagation Delay tpLH / tpHL (Max) | 40ns / 40ns | 40ns / 40ns | 40ns / 40ns | 40ns / 40ns | 40ns / 40ns | 40ns / 40ns | 40ns / 40ns | 40ns / 40ns | 40ns / 40ns |
| Voltage - Supply | 4.5V ~ 5.5V | 3V ~ 3.6V, 4.5V ~ 5.5V | 3V ~ 3.6V, 4.5V ~ 5.5V | 3V ~ 3.6V, 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 100°C | -40°C ~ 105°C | -40°C ~ 105°C | -40°C ~ 105°C | -40°C ~ 100°C | -40°C ~ 100°C | -40°C ~ 100°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
ACPL-072L Series (ACPL-072L-000E, ACPL-072L-500E, ACPL-072L-560E): These Broadcom parts are direct functional equivalents for 25Mbps applications. All three variants are ROHS3 compliant with extended operating temperature range to 105°C. The ACPL-072L series supports dual supply voltage operation (3V-3.6V and 4.5V-5.5V), providing flexibility for mixed-voltage systems. Common mode transient immunity is specified at 10kV/µs, which is lower than the FOD0720R2's 20kV/µs specification. Packaging variants differ by distribution format: ACPL-072L-000E in Tube, ACPL-072L-500E and ACPL-072L-560E in Cut Tape & Digi-Reel formats. Inventory availability is high across all three variants (1900 to 23410 units).
HCPL-0720 Series (HCPL-0720-000E, HCPL-0720-500E): These Broadcom parts match the FOD0720R2 in data rate (25MBd) and supply voltage range (4.5V-5.5V). Both variants are ROHS3 compliant. Operating temperature range is limited to -40°C to 85°C, which is narrower than the FOD0720R2's -40°C to 100°C specification. Common mode transient immunity is 10kV/µs. HCPL-0720-000E is available in Tube packaging (2020 units), while HCPL-0720-500E is in Cut Tape & Digi-Reel format (6603 units).
HCPL-0710 Series (HCPL-0710-000E, HCPL-0710-500E, HCPL-0710-560E): These Broadcom parts operate at 12.5MBd data rate, half the speed of the FOD0720R2. All three variants are ROHS3 compliant with operating temperature range of -40°C to 100°C, matching the FOD0720R2. Supply voltage is 4.5V-5.5V. Common mode transient immunity is 10kV/µs. These parts are suitable for applications where 12.5Mbps bandwidth is sufficient. Packaging options include Tube (HCPL-0710-000E, 2000 units) and Cut Tape & Digi-Reel formats (HCPL-0710-500E with 23113 units, HCPL-0710-560E with 2938 units in Tape & Reel).
Selection Criteria: For direct replacement in 25Mbps applications requiring 4.5V-5.5V operation and -40°C to 100°C temperature range, HCPL-0720-000E or HCPL-0720-500E are preferred. For applications tolerating lower operating temperature limits (-40°C to 85°C), ACPL-072L series offers extended supply voltage flexibility. For lower bandwidth requirements (12.5Mbps), HCPL-0710 series provides cost-effective alternatives. All recommended substitutes maintain ROHS3 compliance and MSL 1 rating.
Frequently Asked Questions (FAQ)
Q: Can ACPL-072L series parts directly replace FOD0720R2 in all applications? A: ACPL-072L parts are functionally compatible for 25Mbps data rate applications. However, the common mode transient immunity is specified at 10kV/µs versus FOD0720R2's 20kV/µs. Applications sensitive to high-speed common mode transients may require circuit-level evaluation. Operating temperature range extends to 105°C, providing additional margin. Supply voltage flexibility (3V-3.6V and 4.5V-5.5V) enables use in mixed-voltage systems.
Q: What is the difference between HCPL-0710 and HCPL-0720 series? A: The primary difference is data rate: HCPL-0710 operates at 12.5MBd while HCPL-0720 operates at 25MBd. Both maintain identical isolation voltage (3750Vrms), output configuration (push-pull totem pole), and package form factor (8-SOIC). HCPL-0710 is suitable for applications with lower bandwidth requirements. Operating temperature range for HCPL-0710 extends to 100°C, while HCPL-0720 is limited to 85°C.
Q: Are all substitute parts ROHS3 compliant? A: Yes, all listed substitute parts are ROHS3 compliant. The FOD0720R2 is also ROHS3 compliant, ensuring consistency for regulated applications.
Q: What packaging options are available for each substitute part? A: Substitute parts are available in three packaging formats: Tube (standard packaging for lower volumes), Cut Tape & Digi-Reel (for moderate production volumes), and Tape & Reel (for high-volume manufacturing). Selection depends on production volume and assembly equipment compatibility. All maintain identical electrical performance and 8-SOIC form factor.
Q: Can HCPL-0710 series be used in place of FOD0720R2 for 25Mbps applications? A: HCPL-0710 operates at 12.5MBd, which is insufficient for 25Mbps applications. Use HCPL-0710 only when application bandwidth requirements are 12.5Mbps or lower. For 25Mbps operation, use ACPL-072L or HCPL-0720 series.
Q: What is the significance of common mode transient immunity (CMTI) differences? A: FOD0720R2 specifies 20kV/µs CMTI while substitute parts specify 10kV/µs. CMTI defines the maximum rate of change of common mode voltage the optoisolator can tolerate without causing output errors. Applications with high-speed switching or fast transient events may require the higher CMTI specification. Evaluate circuit conditions before substitution.
Q: Are there supply voltage compatibility considerations? A: FOD0720R2 and HCPL-07xx series operate on 4.5V-5.5V supply. ACPL-072L series supports dual supply ranges (3V-3.6V and 4.5V-5.5V), enabling use in 3.3V systems. Verify supply voltage compatibility with your circuit design before substitution.
Q: What is the moisture sensitivity level (MSL) and why does it matter? A: All parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts can be stored indefinitely without desiccant packaging and do not require baking before reflow soldering, simplifying manufacturing logistics.
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