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MAX3625CUG+
Microsemi Corporation
IC CLOCK GEN PREC LO JITT 24TSSO
2491 Pcs New Original In Stock
Ethernet, Fibre Channel Clock Generator IC 318.75MHz 1 Output 24-TSSOP
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Minimum 1
Minimum 1
5.0 / 5.0
- (424 Ratings)
MAX3625CUG+
Product Overview
663568
DiGi Electronics Part Number
MAX3625CUG+-DGManufacturer
Microsemi Corporation
MAX3625CUG+
Description
IC CLOCK GEN PREC LO JITT 24TSSOInventory
2491 Pcs New Original In Stock
Ethernet, Fibre Channel Clock Generator IC 318.75MHz 1 Output 24-TSSOP
Quantity
Minimum 1
Minimum 1
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MAX3625CUG+ Technical Specifications
Category
Clock/Timing, Application Specific Clock/Timing
Packaging
-
Series
-
Product Status
Obsolete
DiGi-Electronics Programmable
Not Verified
PLL
Yes
Main Purpose
Ethernet, Fibre Channel
Input
LVCMOS, Crystal
Output
LVPECL
Number of Circuits
1
Ratio - Input:Output
2:3
Differential - Input:Output
No/Yes
Frequency - Max
318.75MHz
Voltage - Supply
3V ~ 3.6V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
24-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
24-TSSOP
Base Product Number
MAX3625
Datasheet & Documents
HTML Datasheet
MAX3625CUG+-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
150-MAX3625CUG+
MAX3625CUG+-DG
Standard Package
62
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
丁寧なアフターサポートと安定した在庫により、満足しています。
Dec 02, 2025
I have had excellent experiences with their post-purchase customer care.
Dec 02, 2025
Their customer care team goes out of their way to ensure a positive experience at an affordable cost.
Dec 02, 2025
Their pricing is competitive, and their packaging is environmentally responsible—perfect combo.
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Frequently Asked Questions (FAQ)
Can the MAX3625CUG+ be safely replaced with a newer clock generator in an existing Ethernet timing design, and what are the critical compatibility risks to evaluate?
Replacing the MAX3625CUG+ requires careful evaluation due to its specific LVPECL output, 318.75MHz frequency, and 24-TSSOP footprint. While alternatives like the Si5332 or CDCM7005 offer higher integration, they may not match the exact jitter performance or output swing. Key risks include impedance mismatches from differing output drivers, altered propagation delay, and PLL loop dynamics affecting system-level jitter. Always validate phase noise, output termination, and power sequencing in your actual PCB layout before full migration.
What are the main reliability concerns when designing with the MAX3625CUG+ given that it is now marked as obsolete by Microsemi?
Since the MAX3625CUG+ is obsolete, long-term supply continuity is the primary concern—especially for industrial or telecom deployments with 10+ year lifecycles. Additionally, obsolescence increases the risk of counterfeit parts in the open market. To mitigate, secure last-time buy inventory from authorized distributors, implement rigorous incoming inspection (including X-ray and decapsulation checks), and consider a drop-in replacement path early in your design cycle using pin-compatible or functionally equivalent devices such as the MAX3625CUG+T (if available) or validated second sources.
How should I handle thermal and PCB layout considerations for the MAX3625CUG+ to maintain low jitter performance in a dense 24-TSSOP package?
The MAX3625CUG+’s 24-TSSOP package has limited thermal dissipation, so avoid placing it near high-power components. Use a solid ground plane beneath the IC and ensure all LVPECL outputs are terminated with 50Ω to VTT (typically VCC – 2V). Route clock traces as controlled-impedance differential pairs with minimal vias and guard them with grounded coplanar traces. Thermal vias under the exposed pad (if present) improve heat spreading but must not create stubs that degrade signal integrity—critical for maintaining sub-1ps RMS jitter at 318.75MHz.
Is the MAX3625CUG+ suitable for Fibre Channel applications requiring tight SSCG (spread spectrum clocking) compliance, and what design constraints apply?
The MAX3625CUG+ does not support spread spectrum clocking (SSCG) natively, which may disqualify it from certain Fibre Channel Gen-3/4 systems that mandate EMI reduction via SSCG. If your application requires SSCG, you must either use an external modulation source (not recommended due to added jitter) or migrate to a programmable clock generator like the SI5345. For non-SSCG Fibre Channel links, the MAX3625CUG+’s low intrinsic jitter (<0.5ps RMS) meets Class C requirements—but verify end-to-end system jitter budget including PCB trace loss and receiver sensitivity.
What input clock source options are viable for the MAX3625CUG+, and how do crystal vs. LVCMOS choices impact phase noise and startup reliability?
The MAX3625CUG+ accepts either a crystal (fundamental mode, 10–40MHz typical) or an external LVCMOS clock. Using a high-Q crystal with proper load capacitance (per datasheet CL equations) yields better close-in phase noise but introduces startup uncertainty in harsh environments. An LVCMOS reference offers faster, more deterministic startup but may contribute higher broadband noise. For Ethernet PHY synchronization, prefer a low-jitter LVCMOS source (e.g., from a TCXO); for ultra-low jitter Fibre Channel, a carefully matched crystal with guard rings and minimal parasitics is preferred—always validate startup time across the full 0°C to 70°C operating range.
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.
MAX3625CUG+ CAD Models
Microsemi Corporation MAX3625CUG+ PCB symbols & footprints
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