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Analog Devices Inc./Maxim Integrated MAX3752CCM+
- Part No.:
- MAX3752CCM+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 48-TQFP Exposed Pad
- Datasheet:
-
MAX3752CCM+.pdf
- Description:
- QUAD-PORT BYPASS WITH REPEATER
- Quantity:
- Payment:
- Shipping:
Inventory:1,144
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Product details
Overview
MAX3752CCM+ from Maxim Integrated is a 3.3V quad-port Fibre Channel bypass IC with integrated clock and data recovery (CDR), supporting both 2.125Gbps and 1.063Gbps data rates, featuring four differential L-Port interfaces (LIN1± to LIN4± / LOUT1± to LOUT4±), 1000–1600mVp-p differential output swing, and on-chip 75Ω termination for all ports - deployed in Fibre Channel Arbitrated Loop storage hubs and RAID arrays.
For engineers reviewing the MAX3752CCM+ datasheet, MAX3752CCM+ pinout, MAX3752CCM+ application, or MAX3752CCM+ equivalent, this page delivers verified technical context, jitter tolerance compliance (0.7UI high-frequency), CDR lock indication (LOCK pin), TTL-selectable port bypass logic (SEL1–SEL4), and thermal performance guidance for TQFP-EP packaging.
Technical Context
The MAX3752CCM+ integrates a fully self-contained CDR with internal PLL requiring no external reference clock, delivering frequency lock indication via the LOCK pin when enabled by LOCKEN. Its cascaded quad-port bypass architecture supports up to four L-Ports per device, with each port independently selectable between normal mode (data passes through LINn± → LOUTn±) and bypass mode (data routed from upstream stage).
Each input (IN±, LINn±) and output (OUT±, LOUTn±) features internal 75Ω differential termination (150Ω total), eliminating external resistors for 75Ω transmission lines. The CDR recovers signals corrupted by up to 0.7UI of high-frequency jitter (BER = 10−12) at 2.125Gbps and 0.35UI at 1.063Gbps, with deterministic jitter tolerance of 0.38UI and 0.19UI respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 2.125Gbps ±100ppm or 1.063Gbps ±100ppm - supports dual-speed Fibre Channel FC-AL operation without reconfiguration. |
| Supply Voltage | +3.0V to +3.6V - single-supply operation compatible with standard 3.3V logic and I/O rails. |
| Differential Output Swing | 1000–1600mVp-p into 150Ω load - ensures robust signal integrity across backplane or cable interconnects. |
| Jitter Tolerance | 0.7UI (high-frequency, BER = 10−12) at 2.125Gbps - meets Fibre Channel FC-AL specification for receiver resilience. |
| CDR Lock Time | 4.4ms (CJTPAT pattern) - defines minimum time to achieve stable clock recovery after power-up or CDR enable. |
| Propagation Delay | 2ns (LINn± to LOUT(n+1)±, normal mode) - enables tight timing budgets in multi-port loop topologies. |
| Input Resistance | 132–181Ω differential - matches 75Ω transmission lines with minimal reflection (VSWR <1.3 up to 2.5GHz). |
Pinout & Package
MAX3752CCM+ uses a 48-pin TQFP-EP package (7mm × 7mm × 1.0mm) with exposed pad soldered to ground for thermal management. Pin count, layout, and thermal pad connection are identical to the MAX3752CCM variant; '+' denotes lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN− | Main serial data input pair | Accepts differential input (200–2200mVp-p); drives CDR and first PBC multiplexer. |
| OUT+, OUT− | Main serial data output pair | Delivers recovered or bypassed data; 1000–1600mVp-p swing into 150Ω load. |
| LIN1+ to LIN4+, LIN1− to LIN4− | L-Port differential inputs | Four independent Fibre Channel L-Port receive paths; each selectable via SELn. |
| LOUT1+ to LOUT4+, LOUT1− to LOUT4− | L-Port differential outputs | Corresponding transmit paths; LOUT1± also carries recovered clock when CLKEN = HIGH. |
| SEL1 to SEL4 | Port select control inputs | TTL-level inputs: HIGH enables LINn± path; LOW routes upstream data (bypass mode). |
| CDREN, LOCKEN | CDR and LOCK output enables | TTL inputs: CDREN HIGH activates CDR; LOCKEN HIGH enables LOCK pin assertion on PLL lock. |
| LOCK | CDR lock status indicator | Open-drain TTL output: HIGH indicates stable PLL lock; driven only when LOCKEN = HIGH. |
| VCC (Pins 13,16,21,24) | Power supply connections | Four dedicated +3.3V pins reduce IR drop and improve high-frequency PSRR. |
| GND (Pins 1,4,7,8,11,26,29,30,33,36,39,42,43,46) | Ground connections | 14 ground pins minimize ground bounce and support clean return paths for all high-speed I/O. |
| CFP, CFM | CDR filter capacitor terminals | Connect external 0.22µF capacitor between CFP and CFM to set PLL bandwidth and jitter transfer response. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-port bypass architecture | Enables hot-swap of up to four Fibre Channel L-Ports in live Arbitrated Loop systems without loop interruption. |
| Fibre Channel–compliant jitter tolerance | Supports 0.7UI high-frequency jitter at 2.125Gbps - satisfies FC-AL-2/FC-AL-3 receiver requirements. |
| Integrated 75Ω termination | Eliminates 12 external termination resistors (3 per port × 4 ports), reducing BOM count and board area. |
| Single-supply 3.3V operation | Reduces system power architecture complexity; compatible with common FPGA/ASIC I/O voltage domains. |
| Programmable CDR enable | CDREN pin allows dynamic power gating: disables CDR to save ~50mA when repeater function is unnecessary. |
Applications
| Fibre Channel Storage Hub | RAID Controller Interconnect |
|---|---|
|
Use Scenario: Aggregating multiple disk drives into a shared Fibre Channel loop within enterprise storage enclosures. IC Role / Device Role / Timing Role: Quad-port bypass IC managing physical L-Port connectivity and providing CDR-based signal regeneration between drives. Use Value: Enables non-disruptive drive replacement (hot-swap) while maintaining loop integrity and signal quality over 2.125Gbps links. |
Use Scenario: Connecting RAID controller ASICs to banks of SAS/SATA drives via Fibre Channel Arbitrated Loop infrastructure. IC Role / Device Role / Timing Role: Signal repeater and port selector ensuring jitter-compliant data transfer between controller and drive L-Ports. Use Value: Maintains bit-error rate <10−12 across cascaded drive chains using built-in CDR and low-propagation-delay bypass paths. |
| Fibre Channel Disk Array Backplane | Legacy FC-AL Infrastructure Upgrade |
|
Use Scenario: High-density backplane routing in modular disk array chassis where space-constrained layout demands integrated termination. IC Role / Device Role / Timing Role: Physical layer interface IC providing impedance-matched 75Ω I/O and differential signal conditioning. Use Value: Reduces need for external 75Ω termination networks, simplifying PCB stackup and improving signal fidelity at 1.063Gbps/2.125Gbps. |
Use Scenario: Retrofitting aging FC-AL hubs with enhanced jitter tolerance and lower power consumption. IC Role / Device Role / Timing Role: Drop-in replacement for earlier-generation bypass ICs, adding CDR capability and tighter jitter specs. Use Value: Extends usable cable length and improves link margin in legacy installations without changing firmware or topology. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Fibre Channel bypass and repeater applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3753CCM+ | Higher supply current (225mA typ. vs. 198mA), wider jitter tolerance (0.7UI at both speeds), same pinout and functionality. | Preferred for new designs requiring maximum jitter margin at 1.063Gbps; shares identical footprint and software control. | Select MAX3753CCM+ when operating near jitter limits or deploying in electrically noisy environments. |
| SY88932LKC | Single-port 2.5Gbps CDR/repeater; no integrated port bypass logic or SEL inputs; requires external mux control. | Suitable for point-to-point links or custom bypass implementations, not direct FC-AL quad-port replacement. | Choose SY88932LKC only when designing non-standard topologies or integrating discrete bypass logic. |
Compared with MAX3752CCM+, MAX3753CCM+ offers higher jitter tolerance headroom at identical pinout and power envelope, while SY88932LKC provides higher speed but lacks native quad-port bypass control - making MAX3752CCM+ optimal for standard FC-AL hub and RAID backplane integration.
Availability
MAX3752CCM+ is available at Aetrix Electronics and suitable for Fibre Channel storage hubs, RAID controller interconnects, and disk array backplanes requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX3752CCM+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and high-speed communication ICs for industrial, communications, and computing markets.
The MAX3752CCM+ belongs to Maxim's Fibre Channel physical-layer product line, engineered specifically for reliable, hot-swappable Arbitrated Loop infrastructure in enterprise storage systems.
FAQ
What data rates does the MAX3752CCM+ support?
The MAX3752CCM+ supports two fixed Fibre Channel data rates: 2.125Gbps ±100ppm and 1.063Gbps ±100ppm. It operates natively at either rate without configuration changes - selection is determined by incoming signal frequency and CDR lock behavior. Both rates meet FC-AL-2 and FC-AL-3 specifications, and jitter tolerance is validated separately for each (0.7UI at 2.125Gbps, 0.35UI at 1.063Gbps). The MAX3752CCM+ does not support intermediate or arbitrary data rates.
How does the CDR function in the MAX3752CCM+?
The MAX3752CCM+ integrates a fully self-contained clock and data recovery circuit with an internal PLL that requires no external reference clock. When CDREN is HIGH, the CDR recovers clock and data from the IN± or selected LINn± input, attenuating input jitter up to 0.7UI (2.125Gbps). The recovered clock appears at LOUT1± if CLKEN is asserted. CDR lock status is indicated on the LOCK pin when LOCKEN is HIGH. Disabling CDREN reduces supply current by ~50mA.
Can the MAX3752CCM+ be used in 50Ω systems?
Yes, the MAX3752CCM+ can interface with 50Ω systems using external resistive impedance transformation networks, as documented in Figures 5 and Applications Information. Its native 75Ω differential I/O (150Ω total) must be matched via passive networks - e.g., 300Ω shunt resistors at inputs/outputs for direct 50Ω line connection, or 176Ω/43Ω L-pads for improved match with 75Ω traces. Note that voltage swing is reduced: a 1400mVp-p output into 150Ω yields ~940mVp-p across a 100Ω load in the recommended top configuration.
What is the purpose of the CFP and CFM pins on the MAX3752CCM+?
CFP and CFM are dedicated terminals for connecting an external 0.22µF capacitor that sets the loop filter characteristics of the internal CDR PLL. This capacitor determines jitter transfer bandwidth, lock time, and stability margin. The capacitor must be placed directly between CFP and CFM with short, low-inductance traces. Deviating from the specified 0.22µF value alters jitter filtering performance and may cause failure to lock or excessive output jitter - no other components are permitted on these pins.
Is the MAX3752CCM+ pin-compatible with the MAX3752CCM?
Yes, the MAX3752CCM+ is a direct lead-free replacement for the MAX3752CCM. Both share identical 48-pin TQFP-EP package dimensions, pinout, electrical specifications, thermal pad connection (exposed pad grounded), and operating temperature range (0°C to +70°C). The '+' suffix denotes RoHS-compliant, lead-free finish; all AC/DC parameters, timing, and functional behavior are identical - no PCB or firmware changes are required for migration.
MAX3752CCM+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 48-TQFP Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Networking
- Interface:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 48-TQFP-EP (7x7)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
MAX3752CCM+ FAQ
1.How can I place an order for MAX3752CCM+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3752CCM+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX3752CCM+ reliable?
The price and inventory of MAX3752CCM+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3752CCM+ is usually 5 days.
3.What payment methods are accepted for MAX3752CCM+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3752CCM+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3752CCM+?
MAX3752CCM+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3752CCM+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX3752CCM+?
For technical support, including MAX3752CCM+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3752CCM+ requirements.
6.How does Aetrix verify that MAX3752CCM+ is sourced from the original manufacturer or authorized distributors?
All MAX3752CCM+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX3752CCM+ meets industry standards.
7.What is the process for return or replacement of MAX3752CCM+?
All MAX3752CCM+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX3752CCM+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX3752CCM+ part is unused and in its original packaging.
Return procedure for MAX3752CCM+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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