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9DB803DFLF

REN9DB803DFLF

Renesas Electronics Corporation
PCI Express (PCIe) Fanout Buffer (Distribution), Zero Delay Buffer, Multiplexer IC 400MHz 1 Output 48-SSOP
Active630 in stock
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Overview

The 9DB803DFLF is a high-performance 1:8 PCIe fanout buffer designed to provide zero-delay clock distribution for Gen1 and Gen2 PCI Express systems. It features a phase-locked loop (PLL) and supports HCSL differential inputs and outputs with a maximum frequency of 400MHz. The device includes an SMBus interface for configuration and power management controls.

Why Choose This Part

The buffer offers a high ratio of 1:8 outputs in a compact 48-SSOP package, significantly reducing component count for multi-slot systems. It features a low power consumption of 105mA when fully active and includes a dedicated power-down mode that reduces current to 200uA for energy-sensitive applications.

Applications

Server Motherboards
Distributing synchronous PCIe reference clocks to multiple peripheral slots and mezzanine cards.
Network Switches
Providing high-speed timing signals to multiple ASICs and Ethernet controllers in networking infrastructure.
Industrial PCs
Ensuring low-skew clocking for multi-channel data acquisition and expansion cards.

Key Specifications

PLL Yes
Input HCSL
Output HCSL
Main Purpose PCI Express (PCIe)
Mounting Type Surface Mount
Package / Case 48-BSSOP (0.295", 7.50mm Width)
Frequency - Max 400MHz
Voltage - Supply 3.135V ~ 3.465V
Number of Circuits 1
Ratio - Input:Output 1:8
Operating Temperature 0degC ~ 70degC
Supplier Device Package 48-SSOP
Differential - Input:Output Yes/Yes

Getting Started

When designing with this IC, ensure the SMBus address is correctly configured for software control of output enables. Use high-speed PCB design techniques for HCSL signals, including 50-ohm trace impedance and proper termination as specified in the PCIe reference manual.

9DB803 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
9DB803DFLF (this part) BSSOP-48 630
9DB803DGLFT TFSOP-48 14,255
9DB803DGLF (Renesas Electronics America/NEC) TFSOP-48 188
Also available as: 9DB803DFLFT