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Diodes Incorporated PI6LC48P0301LE
- Part No.:
- PI6LC48P0301LE
- Manufacturer:
- Diodes Incorporated
- Category:
- Application Specific Clock/Timing
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI6LC48P0301LE.pdf
- Description:
- 3-OUTPUT ETHERNET LVPECL SYNTHES
- Quantity:
- Payment:
- Shipping:
Inventory:1,057
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Product details
Overview
PI6LC48P0301 from Pericom is a 3-output LVPECL clock synthesizer optimized for Ethernet reference clock generation, featuring ultra-low phase jitter (0.16ps RMS @156.25MHz), selectable 19.53125MHz/25MHz crystal or LVCMOS input, and dual-bank programmable output dividers supporting 125/156.25/312.5/625MHz outputs in networking systems.
For engineers reviewing the PI6LC48P0301 datasheet, PI6LC48P0301 pinout, PI6LC48P0301 application, or PI6LC48P0301 equivalent, key selection criteria include LVPECL output skew (≤70ps bank skew), dual-supply operation (2.5V/3.3V), crystal interface flexibility, and industrial-temperature support (–40°C to +85°C).
Technical Context
The PI6LC48P0301 integrates a proprietary low-phase-noise PLL with independent Bank A (CLKA/CLKA#) and Bank B (CLKB0/CLKB0#, CLKB1/CLKB1#) output paths, each controlled by dedicated divider select pins (NA_SEL[1:0], NB_SEL[1:0]) and feedback configuration (FBN). It supports both fundamental-mode crystal oscillation (19.6–27.2MHz at FBN=0) and LVCMOS reference input via IN_SEL#.
Phase jitter performance is specified across two integration bands: 1.875MHz–20MHz (0.14–0.17ps RMS) and 12kHz–20MHz (0.32ps RMS typical), with output rise/fall times ≤400ps and duty cycle maintained at 47–53% across all divider settings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Count & Type | Three differential LVPECL output pairs: CLKA/CLKA#, CLKB0/CLKB0#, CLKB1/CLKB1# |
| Supported Frequencies | 125MHz, 156.25MHz, 312.5MHz, 625MHz - programmable per bank via pin-selectable dividers |
| RMS Phase Jitter | 0.16ps @156.25MHz (1.875MHz–20MHz band); ensures compliance with IEEE 802.3an (10GBASE-T) jitter budgets |
| Supply Voltages | Separate 2.5V or 3.3V rails for core (VDD), analog (VDDA), and output banks (VDDOA/VDDOB) |
| Input Options | Crystal oscillator (19.53125MHz or 25MHz) or single-ended LVCMOS/LVTTL reference clock via Ref_IN |
| Operating Temp | –40°C to +85°C ambient - validated for industrial-grade networking equipment deployment |
Pinout & Package
Package: 24-pin TSSOP (lead-free, RoHS-compliant), 173mil width, JEDEC MO-153F/AD compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 (NB_SEL0, NB_SEL1) | Bank B output divider select inputs | Pull-up inputs configuring CLKB0/CLKB1 frequency division ratio (÷2 to ÷8) |
| 3 (M_reset) | Master reset control | Pull-down input forcing all LVPECL outputs to defined low/high states during initialization or fault recovery |
| 5, 6 (CLKA, CLKA#) | Bank A differential LVPECL output | Primary high-frequency clock pair (e.g., 625MHz) with matched routing requirements |
| 7, 8 (OEB, OEA) | Bank B and Bank A output enables | Pull-up inputs disabling respective banks' outputs to reduce EMI or isolate unused clocks |
| 15, 16 (XTAL_IN, XTAL_OUT) | Crystal oscillator interface | Supports parallel-resonant crystals (e.g., 25MHz, 18pF load) with internal oscillator circuitry |
| 17 (Ref_IN) | LVCMOS/LVTTL reference clock input | Single-ended clock input enabled when IN_SEL# = LOW; accepts 10ns edge rate signals |
| 18 (IN_SEL#) | Input source selector | Active-high signal selecting crystal (HIGH) or Ref_IN (LOW) as PLL reference source |
| 19–22 (CLKB1#, CLKB1, CLKB0#, CLKB0) | Bank B differential LVPECL outputs | Two independent output pairs enabling dual-frequency distribution (e.g., 156.25MHz + 125MHz) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-bank programmable outputs | Independent frequency configuration for Bank A (CLKA) and Bank B (CLKB0/CLKB1) enables multi-protocol clocking (e.g., 10GBASE-T + SGMII) |
| Ultra-low phase jitter | 0.14ps RMS @625MHz (1.875MHz–20MHz) meets stringent SerDes jitter requirements for 10G/25G Ethernet PHYs |
| Flexible reference input | Crystal oscillator or LVCMOS/LVTTL reference selection via IN_SEL# allows reuse of existing system clocks or discrete crystal solutions |
| Separate power domains | Dedicated VDDA (analog), VDD (core), and VDDOA/VDDOB (output banks) minimize supply noise coupling into sensitive PLL and output stages |
| Industrial temperature range | –40°C to +85°C operation validated across full voltage and frequency range supports carrier-grade switch/router deployments |
Applications
| 10GBASE-T Ethernet PHY Clocking | Multi-Port Switch Reference Timing |
|---|---|
Use Scenario: Providing 156.25MHz and 625MHz reference clocks to 10GBASE-T PHY ICs in enterprise switches. IC Role / Device Role / Timing Role: LVPECL clock synthesizer generating synchronized, low-jitter reference frequencies for SERDES CDR circuits. Use Value: 0.16ps RMS jitter at 156.25MHz ensures <0.3UI total jitter margin for IEEE 802.3an compliance without external cleanup. | Use Scenario: Distributing distinct Ethernet reference clocks (125MHz, 156.25MHz, 312.5MHz) across multiple switch ASICs on a single board. IC Role / Device Role / Timing Role: Multi-output clock generator eliminating need for multiple discrete oscillators and reducing board space by >40%. Use Value: Independent Bank A/B divider controls enable simultaneous delivery of non-harmonically related frequencies with ≤70ps bank skew. |
| Optical Transport Network Line Cards | Industrial Ethernet Controllers |
Use Scenario: Generating 625MHz clock for CPRI/eCPRI fronthaul interfaces in 5G baseband units. IC Role / Device Role / Timing Role: High-frequency LVPECL synthesizer meeting ITU-T G.8262 EEC-2 wander and jitter specifications. Use Value: 0.14ps RMS phase jitter @625MHz (1.875MHz–20MHz) satisfies OC-192/STM-64 timing stability requirements. | Use Scenario: Supplying 125MHz and 156.25MHz clocks to industrial Ethernet controllers (e.g., TI AM335x, NXP i.MX6) in harsh-environment PLCs. IC Role / Device Role / Timing Role: Temperature-stable clock source operating continuously at –40°C to +85°C with no frequency drift compensation. Use Value: Validated industrial-temp operation and 25MHz crystal interface ensure long-term timing accuracy in uncontrolled cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVPECL clock synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT5T9305C | 4-output LVPECL; higher max frequency (700MHz); requires external loop filter; no integrated crystal driver | Requires external crystal oscillator or buffer; less suitable for cost-sensitive crystal-based designs | Preferred when >3 outputs or tighter 12kHz–20MHz jitter (<0.28ps) is required |
| Si5338A-D-GM | 4-output LVDS/LVPECL; programmable via I²C; lower jitter (0.12ps RMS); integrated crystal option available | Software-configurable frequencies vs. pin-strapped; higher BOM cost due to I²C interface and EEPROM | Chosen for dynamic frequency reconfiguration or when crystal integration simplifies layout |
Compared with IDT5T9305C and Si5338A-D-GM, the PI6LC48P0301 offers pin-strapped simplicity, integrated crystal drive, and optimal jitter-performance/cost balance for fixed-frequency Ethernet clocking without firmware dependency.
Availability
PI6LC48P0301 is available at Aetrix Electronics and suitable for 10GBASE-T PHY clocking, multi-port Ethernet switching, and industrial controller timing requiring stable component supply across commercial and industrial temperature grades.
Supply support for PI6LC48P0301 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
Pericom Semiconductor (acquired by Diodes Incorporated in 2016) specialized in high-performance timing, interface, and signal-integrity solutions for networking and communications infrastructure.
The PI6LC48P0301 belongs to Pericom's HiFlex family-designed specifically for low-jitter, multi-output clock generation in Ethernet, Fibre Channel, and optical transport systems where deterministic timing is critical.
FAQ
What crystal specifications are required for optimal PI6LC48P0301 performance?
The device is characterized for 18pF parallel-resonant crystals at 25MHz (e.g., Pericom FL2500047) or 19.53125MHz. Recommended specs: fundamental mode, ESR ≤50Ω, shunt capacitance ≤7pF, drive level ≤1mW. Crystal load capacitors (C1/C2 = 22pF) must be used to minimize ppm error and ensure stable startup.
How does the PI6LC48P0301 handle power supply noise sensitivity?
It employs three isolated power domains: VDD (core logic), VDDA (analog PLL), and VDDOA/VDDOB (LVPECL output banks). Each requires dedicated 0.1μF bypass caps; VDDA additionally needs a 10Ω resistor + 10μF cap to suppress low-frequency noise, ensuring phase jitter remains below 0.17ps RMS across temperature.
Can unused LVPECL outputs be left floating without impact?
Yes-unused LVPECL outputs (e.g., CLKB1 if only CLKB0 is needed) may be left floating per datasheet guidance. No termination resistors are required, and floating outputs do not degrade jitter performance or increase supply current, simplifying layout in partial-output configurations.
What is the functional difference between Bank A and Bank B outputs?
Bank A (CLKA/CLKA#) and Bank B (CLKB0/CLKB0#, CLKB1/CLKB1#) operate independently: each has separate divider select pins (NA_SEL[1:0], NB_SEL[1:0]), output enables (OEA, OEB), and can generate different frequencies simultaneously-enabling dual-protocol timing (e.g., 156.25MHz for SGMII + 125MHz for RGMII) on one device.
PI6LC48P0301LE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- PLL:
- Yes with Bypass
- Main Purpose:
- Ethernet
- Input:
- LVCMOS, LVTTL, Crystal
- Output:
- LVPECL
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 2:3
- Differential - Input:Output:
- No/Yes
- Frequency - Max:
- 680MHz
- Voltage - Supply:
- 2.375V ~ 2.625V, 3.135V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-TSSOP
PI6LC48P0301LE FAQ
1.How can I place an order for PI6LC48P0301LE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI6LC48P0301LE 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 PI6LC48P0301LE reliable?
The price and inventory of PI6LC48P0301LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6LC48P0301LE is usually 5 days.
3.What payment methods are accepted for PI6LC48P0301LE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6LC48P0301LE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI6LC48P0301LE?
PI6LC48P0301LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI6LC48P0301LE 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 PI6LC48P0301LE?
For technical support, including PI6LC48P0301LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6LC48P0301LE requirements.
6.How does Aetrix verify that PI6LC48P0301LE is sourced from the original manufacturer or authorized distributors?
All PI6LC48P0301LE 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 PI6LC48P0301LE meets industry standards.
7.What is the process for return or replacement of PI6LC48P0301LE?
All PI6LC48P0301LE units undergo pre-shipment inspection (PSI). If there is an issue with PI6LC48P0301LE, 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 PI6LC48P0301LE part is unused and in its original packaging.
Return procedure for PI6LC48P0301LE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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