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Diodes Incorporated PI6C49CB04AJWEX
- Part No.:
- PI6C49CB04AJWEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Clock Buffers, Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PI6C49CB04AJWEX.pdf
- Description:
- IC CLK BUFFER 1:4 160MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,416
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Product details
Overview
PI6C49CB04AJ from Diodes Incorporated is an industrial-grade, low-skew 1-to-4 LVCMOS/LVTTL clock fanout buffer with guaranteed output-to-output skew ≤ ±250 ps, 160 MHz maximum output frequency, and 3.6 V-tolerant CLK input. It operates across 1.5 V to 3.3 V supply rails and features an OE pin that tri-states all outputs for dynamic power management in timing-critical embedded and communications systems.
For engineers reviewing the PI6C49CB04AJ datasheet, PI6C49CB04AJ pinout, PI6C49CB04AJ application, or PI6C49CB04AJ equivalent, this device supports precise clock distribution in multi-processor SoC interfaces, FPGA clock trees, and industrial PLC backplanes where deterministic skew, rail-flexible operation, and robust input tolerance are mandatory.
Technical Context
The PI6C49CB04AJ implements a single-input, quad-output CMOS buffer architecture with internal rail-to-rail switching thresholds and matched propagation paths to ensure sub-250 ps output-to-output skew across temperature and voltage. Its OE-controlled tri-state capability enables dynamic bus sharing without external logic.
It supports four independent LVCMOS/LVTTL-compatible outputs with 20 Ω nominal output impedance, 1.0–1.5 ns rise/fall times, and additive jitter as low as 0.05 ps (RMS) at 156.25 MHz under 3.3 V operation - meeting SONET-compliant phase noise integration requirements over 12 kHz–20 MHz offset bands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Frequency | 160 MHz - supports PCIe Gen1/Gen2 reference clocks and DDR2/DDR3 system clocks. |
| Output-to-Output Skew | ±250 ps - ensures synchronous sampling across multiple ASIC/FPGA domains with <1 UI timing margin loss. |
| Supply Voltage Range | 1.425 V to 3.6 V - enables direct interface with 1.5 V, 1.8 V, 2.5 V, and 3.3 V logic families without level shifters. |
| CLK Input Tolerance | 3.6 V - allows use with legacy 3.3 V oscillators while powered from lower-voltage rails (e.g., 1.8 V). |
| Propagation Delay | 0.8–5 ns - tightly bounded delay variation (<4.2 ns span across VDD/temp) simplifies timing budget allocation. |
| Additive Jitter | 0.05 ps RMS @156.25 MHz - meets stringent jitter budgets for Ethernet PHYs and serial data links. |
| Output Drive Strength | ±8 mA - sufficient to drive 5 pF loads at 160 MHz with <1.5 ns edge rates and minimal signal integrity degradation. |
Pinout & Package
Package: 8-pin SOIC (W), 150 mil wide, RoHS-compliant, lead-free, green (halogen/antimony-free). Thermal resistance θJA = 157 °C/W (still air).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CLK | Clock Input | 3.6 V-tolerant, rail-to-rail CMOS input; accepts 1.5–3.3 V logic levels; internal threshold ≈ VDD/2. |
| 2 - Q1 | Clock Output 1 | LVCMOS/LVTTL-compliant buffered copy of CLK; 20 Ω output impedance; tri-stated when OE = low. |
| 3 - Q2 | Clock Output 2 | Matched-delay, low-skew replica of CLK; identical electrical specs to Q1; supports parallel load distribution. |
| 4 - Q3 | Clock Output 3 | Third synchronized output; skew-matched to Q1/Q2 within ±250 ps; enables triple-domain clocking. |
| 5 - Q4 | Clock Output 4 | Fourth fanout channel; fully symmetric with other outputs; supports 1:4 clock tree expansion without external buffers. |
| 6 - GND | Power Ground | Reference return path for all I/O and supply currents; must be connected to low-impedance PCB ground plane. |
| 7 - VDD | Supply Voltage | Accepts 1.425–3.6 V; requires local 0.1 µF decoupling capacitor; powers internal logic and output drivers. |
| 8 - OE | Output Enable | Active-low control; pulls all Q1–Q4 into high-impedance state when low; tied to VDD for continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low output-to-output skew | ≤ ±250 ps ensures deterministic timing alignment across four downstream clock domains. |
| Rail-flexible supply operation | 1.5 V to 3.3 V VDD range eliminates need for dedicated voltage translators in mixed-rail systems. |
| 3.6 V-tolerant clock input | Enables interoperability with legacy 3.3 V crystal oscillators while operating from 1.8 V or lower rails. |
| Tri-state output enable | OE pin allows dynamic clock gating and bus sharing without external switches or isolation logic. |
| Industrial temperature range | -40°C to +105°C ambient rating supports deployment in harsh environments including factory automation and outdoor telecom. |
Applications
| Multi-Core Processor Clock Distribution | FPGA-Based Test Equipment |
|---|---|
|
Use Scenario: Distributing a single reference clock to four CPU cores with strict inter-core skew limits in an industrial controller. IC Role / Device Role / Timing Role: Low-skew fanout buffer providing four phase-aligned copies of the master clock to core PLL inputs. Use Value: Sub-250 ps output skew prevents setup/hold violations across cores, enabling reliable 160 MHz synchronous operation without per-core deskew compensation. |
Use Scenario: Driving clock inputs of multiple ADC/DAC channels and FPGA logic blocks in automated test equipment. IC Role / Device Role / Timing Role: Timing hub delivering synchronized clocks to mixed-signal subsystems with matched propagation delays. Use Value: 1.0–1.5 ns edge rates and <0.05 ps additive jitter preserve signal integrity for high-resolution data acquisition at 100+ MSPS. |
| Industrial PLC Backplane Timing | Optical Transceiver Module |
|
Use Scenario: Providing isolated, low-jitter clock signals to modular I/O cards on a DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Central clock repeater ensuring deterministic latency and skew across distributed modules. Use Value: OE pin enables hot-swap synchronization - outputs tri-state during card insertion/removal to prevent clock glitches on shared backplane lines. |
Use Scenario: Buffering and distributing 156.25 MHz reference clocks to SERDES lanes in SFP+ transceivers. IC Role / Device Role / Timing Role: Jitter-clean fanout stage between oscillator and high-speed serializer/deserializer ICs. Use Value: 0.05 ps additive jitter at 156.25 MHz directly contributes to meeting IEEE 802.3ae BER requirements without additional jitter cleaning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock fanout buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICS553M-01LFT | 4-output, 1.8 V only; no OE pin; max fOUT = 133 MHz; skew = ±350 ps. | Lacks tri-state control and wider voltage support; limited to fixed 1.8 V systems. | Select when cost sensitivity outweighs flexibility needs and system uses only 1.8 V rails. |
| PI6C20400LEX | 4-output, 3.3 V only; OE pin present; max fOUT = 200 MHz; skew = ±150 ps; higher IDD. | Higher frequency and tighter skew but incompatible with sub-3.3 V logic; consumes up to 38 mA at 100 MHz. | Select when 200 MHz operation and <150 ps skew are required and 3.3 V supply is available. |
Compared with ICS553M-01LFT and PI6C20400LEX, the PI6C49CB04AJ uniquely balances rail flexibility (1.5–3.3 V), integrated OE control, and industrial-grade skew performance (±250 ps) - making it optimal for mixed-voltage, hot-pluggable, and thermally demanding clock distribution tasks.
Availability
PI6C49CB04AJ is available at Aetrix Electronics and suitable for industrial automation controllers, optical transceiver modules, and FPGA-based test instrumentation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for PI6C49CB04AJ 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability timing, power management, and signal integrity solutions for industrial, computing, and communications markets.
The PI6C49CB04AJ belongs to Diodes' Pericom® clock buffer product line, engineered specifically for low-skew, multi-rail clock distribution in space-constrained industrial and telecom infrastructure where timing repeatability and thermal robustness are critical.
FAQ
What is the minimum recommended decoupling capacitance for PI6C49CB04AJ?
A 0.1 µF ceramic capacitor must be placed between VDD (pin 7) and GND (pin 6), located as close as possible to the device. For improved high-frequency noise suppression, a 1 µF bulk capacitor may be added in parallel. This configuration maintains stable supply voltage during fast output transitions and prevents supply-induced jitter.
Can PI6C49CB04AJ drive 50 Ω transmission lines directly?
No - its 20 Ω nominal output impedance is not matched to 50 Ω lines. A series termination resistor (e.g., 33 Ω) placed near the output pin is required for proper impedance matching on traces longer than 1 inch. Parallel termination at the receiver is discouraged unless combined with series resistance to avoid halving the output swing.
Is PI6C49CB04AJ qualified for automotive applications?
No - the "J" suffix denotes Industrial Grade (-40°C to +105°C), not AEC-Q100 qualification. While it meets industrial thermal and reliability requirements, it lacks PPAP documentation, automotive change control, and IATF 16949 manufacturing certification. Diodes offers separate AEC-Q100-qualified variants for automotive use.
How does OE pin behavior affect power consumption?
When OE is low, all four outputs enter high-impedance state and static current drops to ~1 µA (IIL), reducing total IDD by >95% compared to active operation. This enables dynamic power gating in systems where clock distribution is intermittently required, such as sleep-mode wake-up sequences in programmable logic controllers.
PI6C49CB04AJWEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Fanout Buffer (Distribution)
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:4
- Differential - Input:Output:
- No/No
- Input:
- LVCMOS, LVTTL
- Output:
- LVCMOS, LVTTL
- Frequency - Max:
- 160 MHz
- Voltage - Supply:
- 1.425V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
PI6C49CB04AJWEX FAQ
1.How can I place an order for PI6C49CB04AJWEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI6C49CB04AJWEX 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 PI6C49CB04AJWEX reliable?
The price and inventory of PI6C49CB04AJWEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6C49CB04AJWEX is usually 5 days.
3.What payment methods are accepted for PI6C49CB04AJWEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6C49CB04AJWEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI6C49CB04AJWEX?
PI6C49CB04AJWEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI6C49CB04AJWEX 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 PI6C49CB04AJWEX?
For technical support, including PI6C49CB04AJWEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6C49CB04AJWEX requirements.
6.How does Aetrix verify that PI6C49CB04AJWEX is sourced from the original manufacturer or authorized distributors?
All PI6C49CB04AJWEX 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 PI6C49CB04AJWEX meets industry standards.
7.What is the process for return or replacement of PI6C49CB04AJWEX?
All PI6C49CB04AJWEX units undergo pre-shipment inspection (PSI). If there is an issue with PI6C49CB04AJWEX, 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 PI6C49CB04AJWEX part is unused and in its original packaging.
Return procedure for PI6C49CB04AJWEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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