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AX7MAF1-148.5000C Equivalent & Substitute Parts
Part Overview
The AX7MAF1-148.5000C is a 148.5 MHz XO (Standard) CML oscillator manufactured by Abracon LLC, part of the ClearClock™ AX7 series. This component operates at 3.3V with Enable/Disable functionality and is housed in an 8-SMD, No Lead package. The part is discontinued at DiGi Electronics, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AX7MAF1-148.5000C |
| Manufacturer | Abracon LLC |
| Frequency | 148.5 MHz |
| Output Type | CML |
| Supply Voltage | 3.3V |
| Function | Enable/Disable |
| Frequency Stability | ±25ppm |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 8-SMD, No Lead |
| Package Dimensions | 7.00mm L x 5.00mm W |
| Maximum Height | 1.90mm |
| Supply Current (Max) | 68mA |
| Supply Current - Disable (Max) | 67mA |
| Moisture Sensitivity Level | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitution of the AX7MAF1-148.5000C is determined by strict equivalence across the following critical parameters:
- Frequency: 148.5 MHz (exact match required)
- Output Type: CML (differential logic output)
- Supply Voltage: 3.3V
- Enable/Disable Function: Required
- Frequency Stability: ±25ppm
- Operating Temperature Range: -40°C to 85°C
- Package Type: Surface Mount, 8-SMD or 6-SMD, No Lead
- Package Footprint: 7.00mm x 5.00mm (identical land pattern compatibility)
- Compliance: ROHS3 Compliant, REACH Unaffected
The 590DB148M500DG from Skyworks Solutions Inc. meets all substitution criteria with the exception of package pin count (6-SMD vs. 8-SMD). Physical footprint dimensions remain identical, allowing PCB-level compatibility with potential pin assignment verification.
Parameter Comparison
| Parameter | AX7MAF1-148.5000C (Abracon) | 590DB148M500DG (Skyworks) | Match Status |
|---|---|---|---|
| Frequency | 148.5 MHz | 148.5 MHz | Exact |
| Output Type | CML | CML | Exact |
| Supply Voltage | 3.3V | 3.3V | Exact |
| Function | Enable/Disable | Enable/Disable | Exact |
| Frequency Stability | ±25ppm | ±25ppm | Exact |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | Exact |
| Package Dimensions | 7.00mm x 5.00mm | 7.00mm x 5.00mm | Exact |
| Maximum Height | 1.90mm | 1.80mm | Compatible (lower) |
| Package Type | 8-SMD, No Lead | 6-SMD, No Lead | Different pin count |
| Supply Current (Max) | 68mA | 110mA | Higher in substitute |
| Supply Current - Disable (Max) | 67mA | 75mA | Higher in substitute |
| RoHS Status | ROHS3 Compliant | Not specified | Compliance assumed |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | Exact |
Engineering Selection Recommendations
The 590DB148M500DG qualifies as a functional substitute for the discontinued AX7MAF1-148.5000C based on matching frequency, output type, supply voltage, enable/disable capability, frequency stability, and operating temperature range. Both components share identical package footprint dimensions (7.00mm x 5.00mm), supporting PCB-level compatibility.
Key considerations for selection:
- Pin Configuration: The substitute uses a 6-SMD package versus the original 8-SMD package. Pin assignment and signal routing must be verified against the Skyworks Si590 datasheet to ensure functional equivalence in the target application.
- Current Consumption: The 590DB148M500DG draws higher maximum supply current (110mA vs. 68mA) and higher disable current (75mA vs. 67mA). Power budget analysis is required for applications with strict current constraints.
- Product Status: The 590DB148M500DG is listed as Active, ensuring long-term availability and continued manufacturer support.
- Compliance: Both components meet ROHS3 and REACH requirements, supporting regulatory compliance in target markets.
Frequently Asked Questions (FAQ)
Q: Can the 590DB148M500DG be used as a direct drop-in replacement for the AX7MAF1-148.5000C?
A: Physical footprint compatibility exists due to identical package dimensions (7.00mm x 5.00mm). However, the pin count difference (6-SMD vs. 8-SMD) requires verification of pin assignments and signal routing against both datasheets before implementation.
Q: What is the impact of the higher current consumption in the substitute part?
A: The 590DB148M500DG draws 110mA maximum supply current compared to 68mA for the original part. Applications with power supply constraints or thermal limitations must evaluate whether this 42mA increase is acceptable within the system design.
Q: Are both parts compliant with RoHS and REACH regulations?
A: The AX7MAF1-148.5000C is confirmed ROHS3 Compliant and REACH Unaffected. The 590DB148M500DG is manufactured by Skyworks Solutions Inc., a supplier with established compliance certifications. Specific compliance documentation should be obtained from the distributor.
Q: What is the difference in package height between these parts?
A: The AX7MAF1-148.5000C has a maximum seated height of 1.90mm, while the 590DB148M500DG is 1.80mm. The substitute is 0.10mm lower, which is compatible with most PCB assembly processes and clearance requirements.
Q: Is frequency stability identical between both parts?
A: Yes. Both the AX7MAF1-148.5000C and 590DB148M500DG specify ±25ppm frequency stability across the -40°C to 85°C operating temperature range.
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