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Diodes Incorporated PI6CDBL401BZHIEX
- Part No.:
- PI6CDBL401BZHIEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Application Specific Clock/Timing
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
PI6CDBL401BZHIEX.pdf
- Description:
- 3.3V 1:4 LOW POWER PCIE BUFFER
- Quantity:
- Payment:
- Shipping:
Inventory:6,356
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Product details
Overview
PI6CDBL401BZHIEX from Diodes Incorporated is a 4-output, low-power PCIe Gen1/2/3 clock buffer with integrated 100Ω output terminations, 3.3V core supply, 1.8–3.3V selectable output supply, and programmable slew rate/amplitude. It operates across –40°C to +85°C and supports SMBus address selection for multi-device systems in high-density server and storage applications.
For engineers reviewing the PI6CDBL401BZHIEX datasheet, PI6CDBL401BZHIEX pinout, PI6CDBL401BZHIEX application, or PI6CDBL401BZHIEX equivalent, key selection criteria include PCIe Gen3-compliant phase jitter (≤1 ps rms), differential HCSL/LVDS-compatible outputs, PLL/bypass mode flexibility, and industrial-temperature operation with 32-TQFN packaging.
Technical Context
The PI6CDBL401BZHIEX integrates a configurable PLL with three operating modes-High BW, Low BW, and Bypass-selected via the trilevel HIBW_BYPM_LOBW# pin. In PLL mode, it delivers <1 ps rms PCIe Gen3 phase jitter at 100 MHz; in bypass mode, additive jitter is ≤0.05 ps rms.
It features four independent OE# pins enabling per-output clock gating, SMBus-configurable slew rate (2–4.5 V/ns) and amplitude (0.6–0.9 V), and dual power domains: 3.3V analog/digital core (VDDA/VDDR/VDDDIG) and 1.8–3.3V output supply (VDDO), supporting mixed-voltage system interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Count | 4 differential HCSL/LVDS-compatible outputs with integrated 100Ω termination |
| PCIe Compliance | Fully compliant with Gen1, Gen2, and Gen3 timing specs including phase jitter limits |
| Phase Jitter (Gen3) | ≤1 ps rms (PLL mode); ≤0.05 ps rms additive (bypass mode) |
| Supply Voltages | Core: 3.3V ±10%; Outputs: selectable 1.8V/2.5V/3.3V ±10% |
| Operating Temperature | –40°C to +85°C ambient, suitable for industrial and enterprise server environments |
| Package | 32-pin TQFN (ZH32), 5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad |
| SMBus Interface | 7-bit slave address with 3 selectable configurations; supports block read/write and register-level control |
Pinout & Package
PI6CDBL401BZHIEX is housed in a 32-pin Thin Quad Flat No-Lead (TQFN) package (code ZH32), featuring an exposed thermal pad for enhanced thermal dissipation in high-density PCB layouts. Pin numbering follows standard counter-clockwise orientation starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HIBW_BYPM_LOBW# | Mode Selection Input | Trilevel control for PLL High BW / Bypass / Low BW operation |
| CLK_IN / CLK_IN# | Differential Reference Input | Accepts 100 MHz PCIe reference clock; common-mode range 300–725 mV |
| CLK0–CLK3 / CLK0#–CLK3# | Differential Outputs | Four independent HCSL-compatible outputs with programmable amplitude/slew rate |
| OE0#–OE3# | Output Enable Inputs | Active-low per-output gating; internal pull-downs enable default-on behavior |
| VDDO1.8 / VDDO1.8 | Output Supply Rails | Dual 1.8V output supplies support parallel drive of multiple 1.8V receivers |
| CKPWRGD_PD# | Power-Good Control | Initiates startup on first high assertion; low forces power-down mode |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Output Amplitude | Four settings (0.6V–0.9V) via SMBus register Byte1[1:0], enabling optimization for signal integrity across varied trace lengths and loads |
| Configurable Slew Rate | 2 V/ns or 3 V/ns per output pair via SMBus Byte2, reducing EMI while maintaining edge fidelity |
| Three SMBus Addresses | Selectable via SADR_tri pin (0, M, or 1), allowing up to three identical buffers on one bus without address conflict |
| Low-Power Operation | Typical IDDOP = 52 mA @100 MHz with VDDO = 1.8V; power-down current <1.8 mA when outputs disabled |
| Dual Power Domains | Independent 3.3V core (VDDA/VDDR/VDDDIG) and 1.8–3.3V output (VDDO) rails simplify mixed-voltage board design |
Applications
| Enterprise SSD Controllers | AI Accelerator Boards |
|---|---|
Use Scenario: Distributing synchronized 100 MHz PCIe reference clocks to multiple NVMe SSD controllers in a 2U rack-mount storage appliance. IC Role / Device Role / Timing Role: Low-jitter clock buffer providing four terminated HCSL outputs to drive multiple controller PHYs with matched skew (<50 ps). Use Value: Eliminates need for external 100Ω termination resistors and reduces board area by >30% versus discrete solutions while meeting PCIe Gen3 jitter spec. | Use Scenario: Clock distribution for PCIe Gen3 x16 slots hosting GPU or FPGA-based AI accelerators in a training server. IC Role / Device Role / Timing Role: Programmable buffer enabling dynamic slew rate adjustment per slot to compensate for varying trace lengths and connector losses. Use Value: Achieves <1 ps rms phase jitter across all four outputs even under thermal stress (85°C), ensuring reliable link training and stable 8 GT/s data rates. |
| 5G Baseband Units | Industrial Edge Gateways |
Use Scenario: Providing redundant, low-skew clock signals to dual PCIe Gen3 FPGAs handling fronthaul and backhaul processing in a massive MIMO radio unit. IC Role / Device Role / Timing Role: Dual-role buffer operating in bypass mode for ultra-low additive jitter during deterministic real-time processing. Use Value: Delivers 0.05 ps rms additive jitter in bypass mode-critical for minimizing timing uncertainty in sub-100 ns latency-critical 5G protocols. | Use Scenario: Clocking multiple PCIe Gen2 peripherals (NIC, SATA controller, CAN FD interface) in a ruggedized edge gateway deployed in factory automation. IC Role / Device Role / Timing Role: Industrial-temperature-rated buffer with 4 independent OE# pins enabling selective clock gating to reduce system power during idle states. Use Value: Enables >40% dynamic power reduction via per-peripheral clock shutdown while maintaining full PCIe compliance across –40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe clock buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT8T49N242A | 8-output, integrated crystal oscillator input, higher quiescent current (85 mA typical) | Requires no external reference clock; suited for space-constrained single-board designs | Choose when eliminating external crystal and reducing component count outweighs higher power and fixed 8-output count |
| Si53301-A01AGM | 4-output, LVDS-only, no HCSL support, lower max frequency (80 MHz) | Limited to legacy PCIe Gen1/Gen2; lacks programmable amplitude/slew rate | Choose only for cost-sensitive Gen1-only applications where HCSL compatibility and Gen3 jitter performance are not required |
Compared with IDT8T49N242A and Si53301-A01AGM, the PI6CDBL401BZHIEX uniquely balances PCIe Gen3 compliance, HCSL/LVDS dual compatibility, per-output programmability, and industrial temperature range-making it optimal for next-generation server, AI, and 5G infrastructure where signal integrity and design flexibility are non-negotiable.
Availability
PI6CDBL401BZHIEX is available at Aetrix Electronics and suitable for enterprise SSD controllers, AI accelerator boards, 5G baseband units, and industrial edge gateways requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.
Supply support for PI6CDBL401BZHIEX 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The PI6CDBL401BZHIEX belongs to Diodes' Pericom® timing product line, engineered specifically for high-speed serial interface clock distribution in PCIe, SAS, and SGMII systems where low jitter, flexible voltage operation, and robust industrial reliability are essential.
FAQ
What is the minimum output supply voltage supported by PI6CDBL401BZHIEX?
The PI6CDBL401BZHIEX supports output supply voltages of 1.8V, 2.5V, and 3.3V, each with ±10% tolerance. The absolute minimum valid VDDO is 1.62V (1.8V × 0.9), verified in electrical characteristics tables. Operation below this violates specification and may cause output amplitude collapse or duty cycle distortion.
Can PI6CDBL401BZHIEX drive LVDS receivers directly without external termination?
Yes-when configured for LVDS mode using appropriate SMBus registers and external biasing (Vcm = 1.2V), the PI6CDBL401BZHIEX drives LVDS inputs directly. The datasheet provides explicit test load schematics with R7a/R7b = 140Ω and Cc = 0.1 µF for receiver-terminated LVDS, confirming compatibility without added series resistors.
How does the HIBW_BYPM_LOBW# pin determine PLL operating mode?
HIBW_BYPM_LOBW# is a trilevel input: logic low selects Low BW PLL mode (10kHz–1.5MHz bandwidth), mid-level (0.4–0.6×VDD) selects Bypass mode (no PLL, direct path), and logic high selects High BW PLL mode (1.5MHz–50MHz). This mapping is defined in the PLL Operating Mode Table and validated by register readback bits in SMBus Byte1[7:6].
Is CKPWRGD_PD# required for normal operation, or can it be tied high permanently?
CKPWRGD_PD# must be asserted high after power stabilization to initiate device startup and sample latched inputs (SADR_tri, HIBW_BYPM_LOBW#). It can be tied high permanently in systems with clean, monotonic 3.3V rail ramp-up-but if power sequencing is uncontrolled, leaving it floating or improperly biased risks undefined startup behavior and failed clock output enable.
PI6CDBL401BZHIEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- PLL:
- Yes
- Main Purpose:
- PCI Express (PCIe)
- Input:
- Clock
- Output:
- HCSL, LVDS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:4
- Differential - Input:Output:
- Yes/Yes
- Frequency - Max:
- 105MHz
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-TQFN (5x5)
PI6CDBL401BZHIEX FAQ
1.How can I place an order for PI6CDBL401BZHIEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI6CDBL401BZHIEX 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 PI6CDBL401BZHIEX reliable?
The price and inventory of PI6CDBL401BZHIEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI6CDBL401BZHIEX is usually 5 days.
3.What payment methods are accepted for PI6CDBL401BZHIEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI6CDBL401BZHIEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI6CDBL401BZHIEX?
PI6CDBL401BZHIEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI6CDBL401BZHIEX 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 PI6CDBL401BZHIEX?
For technical support, including PI6CDBL401BZHIEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI6CDBL401BZHIEX requirements.
6.How does Aetrix verify that PI6CDBL401BZHIEX is sourced from the original manufacturer or authorized distributors?
All PI6CDBL401BZHIEX 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 PI6CDBL401BZHIEX meets industry standards.
7.What is the process for return or replacement of PI6CDBL401BZHIEX?
All PI6CDBL401BZHIEX units undergo pre-shipment inspection (PSI). If there is an issue with PI6CDBL401BZHIEX, 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 PI6CDBL401BZHIEX part is unused and in its original packaging.
Return procedure for PI6CDBL401BZHIEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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