9DBV0441AKILF - 1.8V PCIe Gen1-3 4-Ch Clock Buffer | Renesas
MPN: 9DBV0441AKILF ✓ פעיל9DBV0441AKILF סקירה
A zero-delay buffer (ZDB) is a type of clock buffer IC that maintains the timing relationship between input and output clocks using an internal phase-locked loop (PLL). ZDBs sit in the clock distribution hierarchy between the platform clock generator (e.g., CK410/CK505) and endpoint devices, regenerating and fanning out low-jitter clocks to multiple loads while preserving input-to-output delay within tens of picoseconds. As a member of the SOC-Friendly 1.8 V VLP PCIe family, this part is specifically positioned for power-sensitive SoC platforms where 1.8 V supply rails are already present.
Key differentiating specifications include four HCSL outputs with integrated 100 ohm terminations (eliminating external Rs at each output), software-selectable 100 MHz/125 MHz operation, pin/software-selectable PLL bypass for minimum jitter mode, and per-output programmable slew rate for tuning across varied line lengths. The 32-VFQFPN (5x5) package with exposed pad provides a low thermal resistance path suited to the part's very-low-power consumption profile.
The architecture uses an internal PLL with programmable loop filter, allowing the designer to choose between high-bandwidth tracking of the reference (best for jitter attenuation of upstream noise) and low-bandwidth (best for low-frequency jitter transfer to outputs). HCSL outputs are PCIe-compliant and meet all PCIe Gen1-Gen3 base specification jitter masks. Differential input accepts common clock sources including those compliant with CK410/CK505 or PCIe reference clocks. Power is delivered through a single 1.8 V rail, simplifying motherboard layout and BOM.
Typical applications include server and workstation PCIe slot clock distribution, embedded computing platforms with PCIe endpoints, networking switches and routers with 1GbE/10GbE PHYs, storage controllers (SAS/SATA/NVMe), and industrial PCIe expansion cards. The combination of very-low-power operation, small package, and integrated terminations makes the part especially attractive for space-constrained SoC designs.
Designers should pay attention to the reference clock input routing (maintain 100 ohm differential impedance), per-output amplitude/slew programming via SMBus, and thermal pad soldering for the 32-VFQFPN exposed pad. Verify the PLL bandwidth setting matches the jitter profile required by downstream endpoints.
This page synthesizes distributor pricing, drop-in Renesas/PCB-compatible alternatives, and practical design notes not found in the standalone manufacturer datasheet.
חלופות תחליף ישיר עבור 9DBV0441AKILF — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם 9DBV0441AKILF (אותו גורם צורה וטביעת רגל) — שונים ב Number of Outputs, Output Type, Package, Product Type.
9DBV0441AKLFT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
9DBV0441AKILFT
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
9DBV0441AKLF
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
9DBV0441BKLFT
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
9DBV0431AKILFT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
9DBV0531AKILF
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
SI53112-A00AGM
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←SI8442AB-C-IS
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←9DBV0441AKILF מפרטים
| Device Type | Clock Buffer / Zero-Delay Buffer (ZDB) / Fanout Buffer |
| פונקציה | PCIe Gen1-2-3 and 125 MHz Ethernet clock distribution |
| מספר יציאות | 4 |
| סוג פלט | HCSL (PCIe Gen1-2-3 compliant) with integrated 100 ohm terminations |
| Input Type | HCSL-compatible differential (common clock) |
| Output Frequency (PCIe mode) | 100 MHz |
| Output Frequency (Ethernet mode) | 125 MHz (software selectable) |
| Supply Voltage (VDD) | 1.8 V |
| PLL | Internal, pin/software selectable bandwidth and PLL bypass |
| Programmable Slew Rate | Yes, per output |
| Programmable Output Amplitude | Yes, per output |
| Integrated Output Termination | Zo = 100 ohm |
| מארז | 32-VFQFPN Exposed Pad, 5x5 mm |
| סוג הרכבה | Surface Mount |
| טמפרטורת פעולה | -40C to +85C (Industrial) |
| RoHS | Compliant (Lead-Free) |
תצורת פינים של 9DBV0441AKILF
| פין 1 | VDD — 1.8V power supply |
| פין 2 | GND — Ground |
| פין 3 | CLK_IN_P — Differential clock input (positive) |
| פין 4 | CLK_IN_N — Differential clock input (negative) |
| פין 5 | VDD — 1.8V power supply |
| פין 6 | GND — Ground |
| פין 7 | OUT0_P — HCSL output 0 positive (with 100 ohm termination) |
| פין 8 | OUT0_N — HCSL output 0 negative (with 100 ohm termination) |
| פין 9 | OUT1_P — HCSL output 1 positive (with 100 ohm termination) |
| פין 10 | OUT1_N — HCSL output 1 negative (with 100 ohm termination) |
| פין 11 | VDD — 1.8V power supply |
| פין 12 | GND — Ground |
| פין 13 | OUT2_P — HCSL output 2 positive (with 100 ohm termination) |
| פין 14 | OUT2_N — HCSL output 2 negative (with 100 ohm termination) |
| פין 15 | OUT3_P — HCSL output 3 positive (with 100 ohm termination) |
| פין 16 | OUT3_N — HCSL output 3 negative (with 100 ohm termination) |
| פין 17 | VDD — 1.8V power supply |
| פין 18 | GND — Ground |
| פין 19 | SDA — SMBus serial data |
| פין 20 | SCL — SMBus serial clock |
| פין 21 | ADDR — SMBus address select |
| פין 22 | PLL_BW — PLL bandwidth select / PLL bypass |
| פין 23 | FREQ_SEL — Frequency select (100/125 MHz) |
| פין 24 | OE — Output enable |
| פין 25 | NC — Not connected (per datasheet) |
| פין 26 | NC — Not connected (per datasheet) |
| פין 27 | GND — Ground |
| פין 28 | VDD — 1.8V power supply |
| פין 29 | NC — Not connected (per datasheet) |
| פין 30 | NC — Not connected (per datasheet) |
| פין 31 | RESERVED — Reserved - tie to GND per datasheet |
| פין 32 | RESERVED — Reserved - tie to GND per datasheet |
יישומים טיפוסיים
9DBV0441AKILF מתאים עבור 6 יישוםs: Server PCIe Slot Clock Distribution, 1GbE Ethernet Switch Clock Distribution, Storage Controller (NVMe/SAS) Clock Fanout, Industrial Embedded PCIe Platform, Embedded Computing SOM Clock Buffer, Test Equipment PCIe Backplane.
Server PCIe Slot Clock Distribution
The 9DBV0441AKILF fans out a 100 MHz PCIe reference clock to multiple PCIe slots on server and workstation motherboards. Its 1.8 V supply aligns with SOC-Friendly SoC platforms, while integrated 100 ohm HCSL terminations eliminate external Rs and reduce BOM. The four HCSL outputs meet PCIe Gen1-3 base spec jitter requirements, ensuring downstream root complexes and endpoints receive clean 100 MHz clocks. Per-output programmable slew rate lets designers tune each lane for its specific trace length, reducing EMI and improving signal integrity across long server board runs.
מומלץ
1GbE Ethernet Switch Clock Distribution
When software-selected to 125 MHz mode, the 9DBV0441AKILF provides reference clocks to GbE PHY transceivers in managed switches and routers. The very-low-power 1.8 V operation fits switch ASIC power budgets, while integrated 100 ohm HCSL terminations preserve signal integrity over switch board traces. Pin-selectable PLL bandwidth allows the clock phase noise to be tuned for the specific PHY jitter tolerance. Four outputs cover multiple PHY ports per buffer, lowering component count versus discrete oscillator-and-buffer designs in dense networking hardware.
מומלץ
Storage Controller (NVMe/SAS) Clock Fanout
The 9DBV0441AKILF distributes low-jitter reference clocks to NVMe SSD controllers and SAS/SATA host bus adapters in storage subsystems. Its four HCSL outputs each drive an independent downstream device, simplifying clock tree design in dense storage backplanes. Per-output amplitude programming compensates for varying trace lengths on storage cards, while the integrated 100 ohm terminations eliminate the series resistors that would otherwise populate each output. The 1.8 V supply matches typical storage SoC rails, easing power sequencing.
מומלץ
Industrial Embedded PCIe Platform
Industrial PCs and edge-compute platforms use the 9DBV0441AKILF to fan out 100 MHz PCIe clocks to FPGAs, MPSoCs, and PCIe-to-PCI bridges in -40C to +85C operating environments. The industrial temperature grade supports harsh deployment scenarios, while the 32-VFQFPN 5x5 mm exposed-pad package provides robust thermal performance in sealed boxes. Software-controlled output amplitude and slew rate enable field tuning for varied backplane lengths across custom industrial form factors, giving system integrators flexibility without BOM changes.
מומלץ
Embedded Computing SOM Clock Buffer
System-on-Module designs use the 9DBV0441AKILF as a local PCIe clock buffer on the carrier board, regenerating clocks from the SoC clock generator to downstream PCIe peripherals. The 32-VFQFPN 5x5 mm package fits small PCB footprints typical of carrier boards, and the 1.8 V supply is already present on most modern SoM designs. Programmable PLL bypass mode minimizes phase jitter when the upstream SoC clock is already low-jitter, preserving signal margins for sensitive SerDes interfaces in COM Express and SMARC modules.
מומלץ
Test Equipment PCIe Backplane
ATE and validation chassis designers use the 9DBV0441AKILF to provide clean, multi-output reference clocks to PCIe test backplanes and protocol analyzer cards. The pin-selectable PLL bypass mode allows direct fanout of an external low-noise reference clock, minimizing added jitter in jitter-sensitive compliance test setups. Four HCSL outputs drive multiple DUT slots, while per-output amplitude programming accommodates varied test card impedances. The exposed-pad 32-VFQFPN package simplifies thermal management in densely populated test fixtures.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור 9DBV0441AKILF — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 9DBV0441AKLFT | 9DBV0441AKILFT | 9DBV0431AKILFT | SI53112-A00AGM |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Silicon Labs |
| Package | 32-VFQFPN (5x5 mm) | 32-VFQFPN (5x5 mm) - same | 32-VFQFPN (5x5 mm) - same | 32-VFQFPN (5x5 mm) - same | 32-VFQFPN (5x5 mm) - same |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| RoHS Compliance | Yes (Lead-Free) | Yes | Yes | Yes | Yes |
מבדילים עיקריים
- Integrated 100 ohm HCSL terminations (לעומת9DBV0431AKILFT)
- Dual-mode 100 MHz PCIe / 125 MHz Ethernet (לעומתSI53112-A00AGM)
- Per-output programmable slew rate and amplitude (לעומת9DBV0441AKLFT)
הערות תכנון
Maintain 100 ohm differential impedance on the CLK_IN_P/CLK_IN_N input pair and on each of the four HCSL output pairs. Route the differential pairs with matched length (<5 mil mismatch within a pair) and keep traces short and direct to minimize reflections. The 32-VFQFPN exposed thermal pad MUST be soldered to a continuous ground plane with at least 9 thermal vias for proper heat dissipation and electrical grounding.
Decouple each VDD pin with a 0.1 uF ceramic capacitor placed as close to the pin as possible, plus a bulk 10 uF capacitor near the device. The 1.8 V rail must be low-noise (ripple <50 mVpp) - upstream LDOs (not switching regulators) are recommended to avoid coupling switching noise into the HCSL outputs. Place bulk caps at the regulator output to minimize transients during SMBus programming.
Use per-output programmable slew rate to tune each HCSL output for its specific trace length. Shorter traces benefit from lower slew rate (reduced EMI), while longer traces need higher slew to meet PCIe Gen3 rise/fall time requirements. Per-output amplitude programming allows compensating for cable losses in PCIe-over-cable applications. Always validate PCIe Gen3 compliance jitter (Pj, Rj) at the actual load after PCB layout.
Do NOT leave the PLL_BW pin floating - tie it high for PLL bypass (lowest jitter) or low for PLL operation per the Renesas 9DBV0441 datasheet. SMBus address pins (ADDR) MUST be tied to VDD or GND per the datasheet to select the correct slave address before first communication. Failing to solder the exposed pad causes the part to overheat and increases output jitter at high ambient temperatures.
מידע על תאימות
RoHS compliant and lead-free per Renesas product page. Not AEC-Q100 qualified - this is a commercial/industrial grade clock buffer. Industrial temperature grade -40C to +85C supported.
