Renesas 9DB433AGILFT

Overview

9DB433AGILFT 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 component in server motherboard clock trees and add-in card reference clock fanout.

For engineers reviewing the 9DB433AGILFT datasheet, 9DB433AGILFT pinout, 9DB433AGILFT application, or 9DB433AGILFT equivalent, key selection criteria include PCIe Gen3-compliant additive jitter (<1.0ps rms), tri-level SMBus address selection for multi-device bus sharing, OE#-controlled output enable/disable for ExpressCard power management, and spread-spectrum compatibility for EMI reduction.

Technical Context

The 9DB433AGILFT integrates a configurable PLL with selectable bandwidth (0.7–4.1 MHz) to suppress input jitter while maintaining low additive phase noise. Its dual-mode architecture allows direct bypass of the input clock (5–166 MHz) or PLL-based regeneration (50–110 MHz), enabling system-level jitter cleanup or deterministic delay insertion.

It features four independent 0.7V HCSL differential output pairs with per-channel OE# control, tri-state capability during power-down, and IREF pin calibration for precise 100Ω differential impedance matching. All digital control logic-including SMBus interface, PLL mode selection, and output enable-is implemented via tri-level inputs compatible with 3.3V logic and 5V-tolerant SMBus pins.

Key Specifications

Pinout & Package

9DB433AGILFT is packaged in a 28-pin TSSOP (Thin Shrink Small Outline Package) with 0.65mm pitch, JEDEC MO-153 compliant. The package supports surface-mount assembly and thermal performance suitable for high-density server PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 9DB433AGILFT, the 9DB434AGILFT adds two OE pins for full per-output control but shares identical jitter, skew, and thermal specs; the PI6C557-03LEX offers broader output format support but sacrifices PCIe Gen3 jitter compliance and digital configurability.

Availability

9DB433AGILFT is available at Aetrix Electronics and suitable for server motherboard clock trees, PCIe add-in card fanout, and industrial embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 9DB433AGILFT 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 is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The 9DB433AGILFT belongs to Renesas' high-performance timing portfolio, designed specifically for PCIe Gen1–3 clock distribution in space-constrained, thermally demanding server and communications platforms.

FAQ

What is the operating temperature range for the 9DB433AGILFT?

The 9DB433AGILFT is rated for industrial temperature operation from –40°C to +85°C. All key specifications-including phase jitter (≤1.0ps rms for PCIe Gen3), output skew (≤50ps), and PLL bandwidth-are guaranteed across this full range, making it suitable for ruggedized server and telecom equipment deployments where ambient thermal conditions exceed commercial limits.

Does the 9DB433AGILFT support spread-spectrum clocking (SSC)?

Yes, the 9DB433AGILFT is explicitly designed to track spread-spectrum input clocks with triangular modulation between 30–33 kHz. Its internal circuitry maintains tight tracking of the frequency deviation, ensuring low EMI without introducing additional jitter-critical for PCIe Gen3 compliance where SSC is commonly employed to meet FCC radiated emission limits.

How many output pairs does the 9DB433AGILFT provide, and what is their electrical standard?

The 9DB433AGILFT provides four fully independent 0.7V current-mode differential HCSL output pairs: DIF_1/1#, DIF_2/2#, DIF_5/5#, and DIF_6/6#. Each pair is terminated internally to match 100Ω differential impedance when used with the standard 475Ω IREF resistor, eliminating the need for external series or parallel termination components.

Can the 9DB433AGILFT operate in both PLL and bypass modes-and how is mode selection performed?

Yes, the 9DB433AGILFT supports both PLL mode (50–110 MHz, jitter-cleaning) and bypass mode (5–166 MHz, zero-delay). Mode selection is performed via the tri-level input BYP#_HIBW_LOBW (Pin 12): low = bypass, mid = PLL high-bandwidth, high = PLL low-bandwidth. The setting is latched at power-up and can also be configured via SMBus register Byte 0, bits 3 and 1.

What is the function of the IREF pin on the 9DB433AGILFT, and what resistor value is required?

The IREF pin (Pin 26) outputs a precision reference current used to calibrate the 0.7V HCSL output drivers. A 475Ω ±1% resistor must be connected from IREF to ground to establish 2.32mA reference current, which sets the correct output voltage swing and impedance for 100Ω differential loads. Using other values adjusts output drive strength for non-standard impedances.