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Diodes Incorporated PI6CX201ALEX-1304
- Part No.:
- PI6CX201ALEX-1304
- Manufacturer:
- Diodes Incorporated
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI6CX201ALEX-1304.pdf
- Description:
- IC JITTER ATTEN 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,719
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Product details
Overview
PI6CX201ALEX-1304 from Pericom Semiconductor is a 25MHz PLL-based jitter attenuator IC with integrated VCXO, designed for precision clock clean-up in telecom and datacom timing paths. It delivers <350fs RMS phase jitter (12kHz–5MHz), ±100ppm free-run accuracy, and operates from a single 3.3V supply across –40°C to +85°C industrial temperature range.
For engineers reviewing the PI6CX201ALEX-1304 datasheet, PI6CX201ALEX-1304 pinout, PI6CX201ALEX-1304 application, or PI6CX201ALEX-1304 equivalent, key selection factors include its low-jitter VCXO architecture, LVCMOS-compatible dual outputs (CLK_OUT1/CLK_OUT2), lock detection signal, and configurable divider via S0/S1/S2 pins for fixed-frequency jitter cleaning.
Technical Context
The PI6CX201ALEX-1304 implements a charge-pump PLL with integrated voltage-controlled crystal oscillator (VCXO), using an external SaRonix-eCera™ 25MHz crystal (e.g., GC2500099) as the reference. Its loop filter connects externally at LF and VC pins, enabling bandwidth tuning (e.g., 25kHz typical, adjustable down to 100Hz).
It accepts a single-ended LVCMOS REF_CLK input and requires FB_CLK feedback-typically routed from CLK_OUT1 to pin 12-to achieve phase lock. Output frequency is fixed at 25MHz but supports internal division for CLK_OUT2 via S0/S1/S2 logic, while FREE_RUN pin enables ±100ppm open-loop operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Jitter (RMS) | 0.35 ps typical (12kHz–5MHz); enables compliance with SONET OC-192 and 10GbE timing masks |
| Supply Voltage | 3.135–3.465 V; tight 3.3V tolerance ensures stable VCXO control under rail variation |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade base station and optical line card environments |
| Free-Run Accuracy | ±100 ppm; maintains functional timing during input loss without system reset |
| Output Drive | LVCMOS, 8mA drive strength; directly interfaces with FPGA clock inputs and ASIC clock buffers |
| Lock Detection | Dedicated LD pin asserts logic low when locked (REF_CLK >1MHz & phase error <2ns over 8 cycles) |
| Loop Bandwidth | 25 kHz typical (adjustable via R1/C1/C2); balances jitter attenuation vs. transient response |
Pinout & Package
Package: 20-pin TSSOP (L), Pb-free & Green, body size 6.5mm × 4.4mm, 0.65mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| X1 | Crystal input | Connects to one terminal of external 25MHz SaRonix-eCera™ crystal (e.g., GC2500099) |
| X2 | Crystal output | Drives second crystal terminal; forms Pierce oscillator with internal inverter and load caps |
| REF_CLK | Reference clock input | LVCMOS input to phase detector; must exceed 1MHz for lock detection to activate |
| FB_CLK | Feedback clock input | Required for PLL closure; typically tied to CLK_OUT1 to close loop on internal VCXO |
| CLK_OUT1 / CLK_OUT2 | Dual LVCMOS clock outputs | CLK_OUT1 = direct VCXO output; CLK_OUT2 = divided-by-1/2/3/4/6/8 via S0/S1/S2 configuration |
| LD | Lock detect output | Open-drain or push-pull LVCMOS flag indicating stable phase lock (low = locked) |
| FREE_RUN | Mode control input | Pulled high internally; driven low to enter ±100ppm free-run mode during input failure |
| VC, LF | VCXO control interface | VC = analog control voltage (0–3.3V); LF = connection point for external RC loop filter |
Key Features
| Feature | Design Value |
|---|---|
| Integrated VCXO + PLL architecture | Eliminates need for external oscillator and discrete PLL IC, reducing BOM count and board area |
| Configurable CLK_OUT2 divider | S0/S1/S2 pins select 25MHz, 12.5MHz, 33.33MHz, 66.67MHz outputs without reprogramming |
| Single 3.3V supply operation | Removes need for separate analog/digital rails; simplifies power sequencing and layout |
| Dedicated lock detection (LD) | Provides system-level fault signaling for clock monitoring and failover control logic |
| Industrial temperature rating | Validated performance from –40°C to +85°C ensures reliability in uncooled telecom chassis |
Applications
| Optical Transport Network (OTN) Line Cards | 10 Gigabit Ethernet Switches |
|---|---|
Use Scenario: Clean 25MHz reference for SERDES CDR circuits in OTU2/OTU3 framer ICs. IC Role / Device Role / Timing Role: Jitter attenuator providing sub-500fs RMS clock to meet ITU-T G.8251 mask requirements. Use Value: Enables deterministic bit-error-rate (BER) performance by suppressing upstream jitter from backplane traces. | Use Scenario: Stabilize local clock for PHY and MAC layers in multi-port 10GbE switches. IC Role / Device Role / Timing Role: Low-jitter 25MHz source for IEEE 802.3ae XAUI interface timing recovery. Use Value: Reduces packet loss and latency variation caused by reference clock phase noise in switch fabric buffers. |
| Wireless Baseband Units (BBUs) | Industrial PLC Timing Modules |
Use Scenario: Provide clean synchronization clock for FPGA-based digital up/down converters in LTE/5G RRUs. IC Role / Device Role / Timing Role: Jitter-cleaned 25MHz reference for ADC/DAC sampling clocks and FPGA logic timing. Use Value: Improves EVM and ACLR by minimizing sampling clock jitter-induced spectral regrowth. | Use Scenario: Replace aging crystal oscillators in programmable logic controller CPU modules requiring long-term stability. IC Role / Device Role / Timing Role: Industrial-grade jitter attenuator supporting deterministic real-time I/O cycle timing. Use Value: Maintains ±100ppm accuracy during brownouts via FREE_RUN mode, preventing PLC scan failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar jitter attenuation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5338-A-GM | Multi-output, programmable Any-Frequency™ synthesizer; requires I²C config; higher integration but no FREE_RUN pin | Used where flexible output frequencies needed; not drop-in for fixed 25MHz jitter cleaning | Select if frequency agility or multiple synchronized outputs are required |
| ICS8430I-01T | Fixed 25MHz jitter cleaner with similar VCXO+PLL architecture; no S0/S1/S2 divider; only single output | Lower cost for single-output-only systems; lacks CLK_OUT2 configurability and FREE_RUN mode | Select if only one clean 25MHz output is needed and free-run capability is unnecessary |
Compared with Si5338-A-GM and ICS8430I-01T, the PI6CX201ALEX-1304 uniquely combines fixed-frequency jitter attenuation, dual LVCMOS outputs with hardware-selectable division, and a dedicated FREE_RUN mode-making it optimal for cost-sensitive, industrial-grade 25MHz clock clean-up where simplicity and fail-safe behavior are prioritized.
Availability
PI6CX201ALEX-1304 is available at Aetrix Electronics and suitable for optical transport line cards, 10GbE switching platforms, wireless baseband units, and industrial PLC timing modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PI6CX201ALEX-1304 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 was a fabless provider of high-performance timing, interface, and signal integrity solutions, acquired by Diodes Incorporated in 2016; legacy products maintain full datasheet compliance and industrial qualification.
The PI6CX201A belongs to Pericom's jitter attenuation product line, engineered specifically for telecom and datacom applications demanding ultra-low phase noise, robust lock detection, and industrial temperature resilience in fixed-frequency clock clean-up roles.
FAQ
What crystal type and part number is required for PI6CX201ALEX-1304?
The PI6CX201ALEX-1304 requires a 25MHz fundamental-mode AT-cut SMD crystal with load capacitance matching the internal oscillator design-specifically SaRonix-eCera™ GC2500099 (industrial temp) or GC2500065 (commercial). The crystal must be placed within 300 mils of X1/X2 pins with proper grounding per layout guidelines.
Can PI6CX201ALEX-1304 generate output frequencies other than 25MHz?
CLK_OUT1 is fixed at 25MHz (VCXO frequency). CLK_OUT2 supports 25MHz, 12.5MHz, 33.33MHz, and 66.67MHz via S0/S1/S2 pin strapping-but no other frequencies are supported. It does not support fractional-N synthesis or I²C programming; all outputs derive from the same 25MHz VCXO core.
How is loop filter design validated for PI6CX201ALEX-1304?
Loop filter components (R1, C1, C2) are selected based on target loop bandwidth and jitter peaking profile. Pericom provides recommended values-for example, 5.1kΩ/1µF/0.1µF for 100Hz bandwidth-and advises consulting factory for custom profiles. Layout must include ground ring around LF/VC pins and crystal to minimize noise coupling.
Does PI6CX201ALEX-1304 support differential clock inputs or outputs?
No. PI6CX201ALEX-1304 supports only single-ended LVCMOS inputs (REF_CLK, FB_CLK) and outputs (CLK_OUT1, CLK_OUT2). It does not accept LVDS, HCSL, or differential crystal drive. For differential applications, external level-shifting or dedicated differential jitter cleaners (e.g., Si534x series) are required.
PI6CX201ALEX-1304 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Jitter Attenuator
- PLL:
- Yes
- Input:
- Crystal, LVCMOS
- Output:
- LVCMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:2
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 25MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3.135V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-TSSOP
PI6CX201ALEX-1304 FAQ
1.How can I place an order for PI6CX201ALEX-1304 through Aetrix?
Please submit a Request for Quotation (RFQ) for PI6CX201ALEX-1304 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 PI6CX201ALEX-1304 reliable?
The price and inventory of PI6CX201ALEX-1304 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6CX201ALEX-1304 is usually 5 days.
3.What payment methods are accepted for PI6CX201ALEX-1304?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6CX201ALEX-1304 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI6CX201ALEX-1304?
PI6CX201ALEX-1304 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI6CX201ALEX-1304 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 PI6CX201ALEX-1304?
For technical support, including PI6CX201ALEX-1304 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6CX201ALEX-1304 requirements.
6.How does Aetrix verify that PI6CX201ALEX-1304 is sourced from the original manufacturer or authorized distributors?
All PI6CX201ALEX-1304 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 PI6CX201ALEX-1304 meets industry standards.
7.What is the process for return or replacement of PI6CX201ALEX-1304?
All PI6CX201ALEX-1304 units undergo pre-shipment inspection (PSI). If there is an issue with PI6CX201ALEX-1304, 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 PI6CX201ALEX-1304 part is unused and in its original packaging.
Return procedure for PI6CX201ALEX-1304:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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