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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Application Specific Clock/Timing

Renesas 9DB433AGILF

Name: 9DB433AGILF
Brand: Renesas
SKU: 9DB433AGILF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 9DB433AGILF

Manufacturer:: Renesas

Category:: Application Specific Clock/Timing

Package:: 28-TSSOP (0.173", 4.40mm Width)

Datasheet:: 9DB433AGILF.pdf

Description:: IC CLK FANOUT/BUFF ZD 28TSSOP

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Product details

Overview

9DB433AGILF from Renesas Electronics (formerly IDT) is a 4-output, 0.7V current-mode differential HCSL zero-delay/fanout buffer optimized for PCIe Gen1–3 clock distribution. It supports PLL and bypass modes, delivers <50ps output-to-output skew and <1.0ps rms phase jitter in PCIe Gen3 mode, and operates across –40°C to +85°C industrial temperature range. It serves as a critical timing element in server motherboard clock trees, driving multiple PCIe slots and add-in cards.

For engineers reviewing the 9DB433AGILF datasheet, 9DB433AGILF pinout, 9DB433AGILF application, or 9DB433AGILF equivalent, key selection criteria include its HCSL output compliance, tri-level SMBus address selection, OE#-controlled output enable/disable per pair, spread-spectrum compatibility, and configurable PLL bandwidth for downstream jitter management.

Technical Context

The 9DB433AGILF integrates a low-jitter PLL with selectable bandwidth (0.7–4.1 MHz) and a bypass path for deterministic latency. Its dual-mode operation enables either dejittering (PLL mode: 50–110 MHz) or zero-delay forwarding (bypass mode: 5–166 MHz), with input-to-output propagation delay of –45 ps (typ) in PLL mode and 4115 ps (typ, commercial) / 4263 ps (typ, industrial) in bypass mode.

It features four independent 0.7V HCSL differential output pairs (DIF_1/DIF_1#, DIF_2/DIF_2#, DIF_5/DIF_5#, DIF_6/DIF_6#), each controllable via dedicated active-low OE# pins (OE1#, OE6#) and SMBus registers. Power management includes asynchronous PD# shutdown with <1 ms wake-up latency and tri-state capability for undriven outputs in power-down mode.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Type	Four 0.7V current-mode differential HCSL output pairs - matches PCIe REFCLK receiver input requirements without level-shifting.
PCIe Compliance	Phase jitter ≤1.0ps rms (Gen3), ≤3.1ps rms (Gen2 high-band), ≤86ps p-p (Gen1) - meets PCIe base specification timing budgets.
Output Skew	<50ps max output-to-output skew - ensures synchronous clock arrival across multiple PCIe lanes or slots.
Operating Modes	Configurable PLL mode (50–110 MHz) or bypass mode (5–166 MHz) - enables trade-off between jitter cleanup and deterministic latency.
Temperature Range	–40°C to +85°C industrial grade - suitable for ruggedized server, storage, and embedded computing platforms.
SMBus Interface	Tri-level address selection (3 options), 440 kHz max frequency, 5V-tolerant SMBCLK/SMBDAT - allows multi-device sharing on single bus segment.
Power Supply	3.3V core (VDD/VDDA/VDDR), separate analog/digital ground planes (GNDA/GND) - minimizes noise coupling into sensitive PLL and output stages.

Pinout & Package

9DB433AGILF is packaged in a 28-pin TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, JEDEC MO-153 compliant. Pin 1 is VDDR (3.3V analog supply for differential input), and the package supports lead-free (Pb-free), RoHS-compliant assembly.

Pin/Terminal	Circuit Role	Design Meaning
VDDR (Pin 1)	Analog input power rail	Must be filtered separately from digital VDD; supplies SRC_IN/SRC_IN# receiver stage for optimal jitter performance.
SRC_IN / SRC_IN# (Pins 2, 3)	Differential clock input	Accepts 0.7V HCSL reference clock (e.g., from IDT 932S421); requires 100Ω differential termination.
DIF_1–DIF_6 / DIF_1#–DIF_6# (Pins 6–7, 9–10, 19–20, 22–23)	Differential clock outputs	Four HCSL output pairs; each pair driven by internal 6×IREF current source referenced to IREF pin (Pin 26).
OE1# / OE6# (Pins 8, 21)	Active-low output enable	Hardware control for DIF_1/DIF_1# and DIF_6/DIF_6#; logic low enables output, high disables (high-Z).
BYP#_HIBW_LOBW (Pin 12)	Tri-level mode select	Configures device into bypass, high-BW PLL, or low-BW PLL mode at power-up; latched on VDD ramp.
SMB_ADR_tri (Pin 17)	Tri-level SMBus address	Selects one of three SMBus addresses (DA/DB, DC/DD, D8/D9); enables up to three devices on same bus.
PD# (Pin 25)	Asynchronous power-down	Asserting low disables PLL, stops clocks, and places outputs in high-Z or driven-high state per PD# drive mode bit.
IREF (Pin 26)	Current reference output	Drives external 475Ω resistor to GND; sets 2.32mA reference for all HCSL output drivers (6×IREF = 13.9mA per output).

Key Features

Feature	Design Value
Spread-spectrum tracking	Maintains low EMI by synchronously following input SSC modulation (30–33 kHz triangle wave), avoiding beat frequencies.
Configurable PLL bandwidth	Selectable 0.7–1.4 MHz (low BW) or 1.5–4.1 MHz (high BW) - suppresses upstream jitter while avoiding peaking in downstream CDRs.
Per-output enable control	Independent OE1# and OE6# pins allow dynamic power gating of DIF_1/DIF_1# and DIF_6/DIF_6# pairs during system sleep states.
Tri-level SMBus addressing	Three distinct SMBus addresses via single pin (SMB_ADR_tri) - eliminates address conflict in dense multi-buffer clock trees.
Industrial-grade reliability	Rated for –40°C to +85°C ambient, 125°C junction max, and 2000V HBM ESD - validated for 24/7 datacenter and telecom infrastructure use.

Applications

Server Motherboard Clock Distribution	PCIe Add-in Card Fanout
Use Scenario: Distributing a single PCIe reference clock from the platform controller hub (PCH) to eight or more PCIe x16/x8 slots on a dual-socket server board. IC Role / Device Role / Timing Role: Zero-delay fanout buffer that replicates and conditions the REFCLK signal while maintaining PCIe Gen3 phase jitter compliance across all outputs. Use Value: Eliminates need for multiple discrete clock buffers; reduces BOM count and layout complexity while guaranteeing <1.0ps rms jitter on all four output pairs.	Use Scenario: Providing clean, low-skew clock signals to multiple PCIe endpoints (e.g., NVMe SSDs, GPU accelerators) mounted on a high-density add-in card. IC Role / Device Role / Timing Role: Local clock repeater that isolates downstream devices from upstream trace-length variations and crosstalk-induced jitter. Use Value: Enables simultaneous operation of four PCIe Gen3 links with <50ps inter-pair skew, meeting PCIe CEM v4.0 timing margin requirements.
ExpressCard-Compatible Expansion	Industrial Embedded PCIe Root Complex
Use Scenario: Clock buffering in ExpressCard modules where space-constrained layouts require minimal component count and low-power operation. IC Role / Device Role / Timing Role: Low-latency, OE#-controllable buffer enabling hot-plug clock enable/disable for power-managed peripherals. Use Value: OE1#/OE6# pins allow firmware-controlled clock gating during card insertion/removal, reducing inrush current and EMI during hot-swap events.	Use Scenario: Clock conditioning in ruggedized industrial PCs or edge AI gateways requiring PCIe connectivity under extended temperature cycling. IC Role / Device Role / Timing Role: Industrial-temperature-rated PCIe clock buffer with robust PD#-initiated power-down for system-level energy management. Use Value: Maintains PCIe Gen2/Gen3 timing integrity from –40°C to +85°C, with <1 ms wake-up latency after PD# deassertion for fast resume-from-sleep.

Server Motherboard Clock Distribution

PCIe Add-in Card Fanout

Use Scenario: Distributing a single PCIe reference clock from the platform controller hub (PCH) to eight or more PCIe x16/x8 slots on a dual-socket server board.

IC Role / Device Role / Timing Role: Zero-delay fanout buffer that replicates and conditions the REFCLK signal while maintaining PCIe Gen3 phase jitter compliance across all outputs.

Use Value: Eliminates need for multiple discrete clock buffers; reduces BOM count and layout complexity while guaranteeing <1.0ps rms jitter on all four output pairs.

Use Scenario: Providing clean, low-skew clock signals to multiple PCIe endpoints (e.g., NVMe SSDs, GPU accelerators) mounted on a high-density add-in card.

IC Role / Device Role / Timing Role: Local clock repeater that isolates downstream devices from upstream trace-length variations and crosstalk-induced jitter.

Use Value: Enables simultaneous operation of four PCIe Gen3 links with <50ps inter-pair skew, meeting PCIe CEM v4.0 timing margin requirements.

ExpressCard-Compatible Expansion

Industrial Embedded PCIe Root Complex

Use Scenario: Clock buffering in ExpressCard modules where space-constrained layouts require minimal component count and low-power operation.

IC Role / Device Role / Timing Role: Low-latency, OE#-controllable buffer enabling hot-plug clock enable/disable for power-managed peripherals.

Use Value: OE1#/OE6# pins allow firmware-controlled clock gating during card insertion/removal, reducing inrush current and EMI during hot-swap events.

Use Scenario: Clock conditioning in ruggedized industrial PCs or edge AI gateways requiring PCIe connectivity under extended temperature cycling.

IC Role / Device Role / Timing Role: Industrial-temperature-rated PCIe clock buffer with robust PD#-initiated power-down for system-level energy management.

Use Value: Maintains PCIe Gen2/Gen3 timing integrity from –40°C to +85°C, with <1 ms wake-up latency after PD# deassertion for fast resume-from-sleep.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe clock buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
9DB434AGILF	Includes OE2# and OE5# pins (vs. only OE1#/OE6# on 9DB433AGILF); supports full per-output hardware enable.	Required when independent enable control for all four output pairs is needed (e.g., asymmetric power management in multi-FPGA systems).	Select 9DB434AGILF if firmware must independently gate DIF_2/DIF_2# and DIF_5/DIF_5# without SMBus interaction.
PI6C557-03LEX	LVDS output format (not HCSL); fixed 100MHz PLL-only operation; no bypass mode or spread-spectrum support.	Suitable for non-PCIe LVDS clock trees (e.g., FPGA fabric clocks), but incompatible with PCIe REFCLK receivers requiring HCSL drive strength.	Choose PI6C557-03LEX only for legacy LVDS-based designs; not a drop-in replacement for PCIe Gen3 HCSL signaling.

Compared with 9DB433AGILF, 9DB434AGILF adds two extra OE# pins for complete hardware output control, while PI6C557-03LEX lacks HCSL compliance and PCIe-specific jitter performance - making 9DB433AGILF the only option supporting full Gen3 timing, spread-spectrum tracking, and industrial temperature operation in a single 28-pin TSSOP package.

Availability

9DB433AGILF is available at Aetrix Electronics and suitable for server motherboard design, PCIe add-in card development, and industrial embedded computing applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 9DB433AGILF 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

Renesas Electronics Corporation acquired Integrated Device Technology (IDT) in 2019 and now manufactures and supports the full IDT timing portfolio, including PCIe clock buffers and memory interface solutions.

The 9DB433AGILF belongs to Renesas' high-performance PCIe clock buffer product line, engineered specifically for low-jitter, multi-output clock distribution in datacenter, enterprise storage, and high-reliability embedded systems.

FAQ

What is the operating temperature range for the 9DB433AGILF?

The 9DB433AGILF is rated for industrial temperature operation from –40°C to +85°C ambient, with a maximum junction temperature of 125°C. This rating is confirmed in the Ordering Information table (page 15) and Absolute Maximum Ratings section (page 4) of the datasheet, and applies to both TSSOP packages with "I" suffix (e.g., 9DB433AGILF). The device maintains PCIe Gen3 phase jitter compliance across this full range.

Does the 9DB433AGILF support PCIe Gen3 spread-spectrum clocking (SSC)?

Yes, the 9DB433AGILF is explicitly designed for spread-spectrum compatibility. It tracks triangular SSC modulation at 30–33 kHz on the input clock and preserves the spreading profile at all four outputs, minimizing EMI in high-density PCIe systems. This capability is documented in the Features list (page 1), Electrical Characteristics (page 7), and Common Recommendations sections (pages 8–9) of the datasheet.

How many output pairs does the 9DB433AGILF provide, and what is their electrical format?

The 9DB433AGILF provides four differential output pairs: DIF_1/DIF_1#, DIF_2/DIF_2#, DIF_5/DIF_5#, and DIF_6/DIF_6#. All outputs are 0.7V current-mode HCSL (High-Speed Current Steering Logic), compliant with PCIe REFCLK receiver requirements. Each pair sources 13.9mA (6 × IREF) into 50Ω per side (100Ω differential), as specified in the Pin Descriptions (page 3) and Electrical Characteristics tables (pages 4–7).

What is the function of the IREF pin on the 9DB433AGILF?

The IREF pin (Pin 26) is an output that establishes the reference current for all four HCSL output drivers. It requires connection to a precision 475Ω resistor to ground, setting IREF = 2.32mA. This current is multiplied by six internally to generate the 13.9mA output drive per HCSL pair. Deviations from 475Ω directly scale output voltage swing and must be recalculated per impedance target, as detailed in the Pin Descriptions (page 3) and Electrical Characteristics (page 4).

Can the 9DB433AGILF operate in both PLL and bypass modes, and how is mode selection performed?

Yes, the 9DB433AGILF supports both PLL mode (50–110 MHz, jitter cleanup) and bypass mode (5–166 MHz, zero-delay forwarding). Mode selection is controlled by the tri-level input BYP#_HIBW_LOBW (Pin 12), which is latched at power-up. Low = bypass, mid = PLL high-BW, high = PLL low-BW. This configuration is detailed in the Pin Configuration table (page 2), Pin Descriptions (page 3), and PLL Operating Mode Readback Table (page 2).

9DB433AGILF Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 28-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

PLL:: Yes

Main Purpose:: PCI Express (PCIe)

Input:: Clock

Output:: HCSL

Number of Circuits:: 1

Ratio - Input:Output:: 1:4

Differential - Input:Output:: Yes/Yes

Frequency - Max:: 166MHz

Voltage - Supply:: 3.135V ~ 3.465V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 28-TSSOP

9DB433AGILF FAQ

1.How can I place an order for 9DB433AGILF through Aetrix?

Please submit a Request for Quotation (RFQ) for 9DB433AGILF 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 9DB433AGILF reliable?

The price and inventory of 9DB433AGILF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 9DB433AGILF is usually 5 days.

3.What payment methods are accepted for 9DB433AGILF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 9DB433AGILF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 9DB433AGILF?

9DB433AGILF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 9DB433AGILF 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 9DB433AGILF?

For technical support, including 9DB433AGILF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 9DB433AGILF requirements.

6.How does Aetrix verify that 9DB433AGILF is sourced from the original manufacturer or authorized distributors?

All 9DB433AGILF 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 9DB433AGILF meets industry standards.

7.What is the process for return or replacement of 9DB433AGILF?

All 9DB433AGILF units undergo pre-shipment inspection (PSI). If there is an issue with 9DB433AGILF, 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 9DB433AGILF part is unused and in its original packaging.

Return procedure for 9DB433AGILF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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