9DML0441AKILF - 2:4 3.3V PCIe Gen 1-5 Clock Mux | Renesas
N.º da peça: 9DML0441AKILF ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.95 | $3,95 |
| 10 | $3.55 | $35,50 |
| 100 | $3.05 | $305,00 |
| 500 | $2.62 | $1.310,00 |
| 1.000 | $2.25 | $2.250,00 |
9DML0441AKILF Visão geral
A clock buffer (also called a clock multiplexer or clock fanout buffer) is a timing-IC building block that selects between two or more reference clocks and replicates the selected reference to one or more outputs while preserving edge rate, duty cycle and phase noise. Buffers sit one layer below the phase-locked loop (PLL) and above the serializer/deserializer (SerDes) PHY in the clock tree, and they are the standard way to route a PCIe reference-clock from a system clock generator to multiple endpoints such as root complexes, switches, retimers and NVMe SSDs.
Key features of the 9DML0441AKILF include PCIe Gen 1-5 Common Clocked (CC), Separate Reference no Spread (SRnS), and Separate Reference Independent Spread (SRIS) architecture support, Spread Spectrum Clocking (SSC) compatibility, individual OE# pins for each output, and selectable asynchronous or glitch-free gapped-clock switching. The glitch-free mode allows the mux to be selected at power-up even if both inputs are not running, then transitions to glitch-free switching once both inputs are active. This dual-mode behavior is essential for systems that must boot from a single reference and later switch to a redundant or spread reference without producing runt pulses.
Architecturally, the device uses a 3.3 V core with HCSL input receivers, an internal 2:1 selector, four differential output drivers with on-die 100 Ω termination, and per-output OE# logic. The integrated terminations are the main differentiator versus discrete PCIe buffers that require 16 external source-termination resistors.
Typical applications include server motherboards, NVMe SSD controllers, PCIe switches and retimers, workstation add-in cards, and embedded computing platforms that need a robust 100 Ω PCIe reference-clock multiplexer. The wide PCIe Gen 1-5 compliance also makes it suitable for Gen 4 and Gen 5 backplane designs.
When designing with this part, choose 85 Ω variants (e.g., 9DML0451AKILF) for 85 Ω board traces; the 100 Ω output impedance of the 9DML0441AKILF assumes 100 Ω differential routing and a 0.1 μF AC-coupling capacitor at each receiver.
This page synthesizes distributor pricing, drop-in alternatives and practical design notes for the 9DML0441AKILF that are not consolidated in the manufacturer datasheet.
Alternativas drop-in para 9DML0441AKILF — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com 9DML0441AKILF (mesmo formato e footprint) — diferindo em Number of Outputs, Package, RoHS Status, Function, Number of Inputs.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
9DML0451AKILF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
9DML0441BKILF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
9DBL0241AKILF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
9FGV0241AKILF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
9DBL0841AKILF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
9DML0441AKILF Especificações
| Product Type | PCIe Clock Multiplexer / Buffer |
| Função | 2:4 PCIe Gen 1-5 Clock Mux |
| Tensão de alimentação | 3.3 V |
| Input Type | HCSL-compatible differential |
| Number of Inputs | 2 |
| Número de saídas | 4 differential |
| Output Frequency (max) | 200 MHz |
| Output Impedance | 100 Ω (integrated termination) |
| Typical Power Consumption | 79 mW |
| Spread Spectrum Clocking (SSC) | Compatible |
| PCIe Compliance | Gen 1, Gen 2, Gen 3, Gen 4, Gen 5 |
| Switching Modes | Asynchronous or glitch-free gapped-clock |
| Output Enable | Per-output OE# pins |
| Temperatura de operação | -40 °C to +85 °C |
| Encapsulamento | 24-VFQFPN (NLG24P3), 4 mm × 4 mm |
| Tipo de montagem | Surface Mount |
| Carrier / Packaging | Tray |
| Status RoHS | Compliant |
Configuração de pinos do 9DML0441AKILF
| Pino 1 | VDD — 3.3 V supply |
| Pino 2 | CLK0 — HCSL differential input 0 (true) |
| Pino 3 | CLK0# — HCSL differential input 0 (complement) |
| Pino 4 | CLK1 — HCSL differential input 1 (true) |
| Pino 5 | CLK1# — HCSL differential input 1 (complement) |
| Pino 6 | GND — Ground |
| Pino 7 | VDD — 3.3 V supply |
| Pino 8 | OE0# — Output enable for Q0/Q0# (active low) |
| Pino 9 | Q0 — HCSL differential output 0 (true) |
| Pino 10 | Q0# — HCSL differential output 0 (complement) |
| Pino 11 | Q1 — HCSL differential output 1 (true) |
| Pino 12 | Q1# — HCSL differential output 1 (complement) |
| Pino 13 | GND — Ground |
| Pino 14 | VDD — 3.3 V supply |
| Pino 15 | OE1# — Output enable for Q1/Q1# (active low) |
| Pino 16 | Q2 — HCSL differential output 2 (true) |
| Pino 17 | Q2# — HCSL differential output 2 (complement) |
| Pino 18 | Q3 — HCSL differential output 3 (true) |
| Pino 19 | Q3# — HCSL differential output 3 (complement) |
| Pino 20 | OE2# — Output enable for Q2/Q2# (active low) |
| Pino 21 | OE3# — Output enable for Q3/Q3# (active low) |
| Pino 22 | SEL — Mux select input (selects CLK0 or CLK1) |
| Pino 23 | MODE — Switching mode select (asynchronous or glitch-free) |
| Pino 24 | GND — Ground / thermal pad |
Aplicações típicas
9DML0441AKILF é adequado para 6 aplicaçãos: Server Motherboard PCIe Reference Clock Distribution, NVMe SSD Controller Clock Tree, PCIe Switch and Retimer Reference Fanout, Workstation Add-in Card PCIe Compliance, Embedded Computing and COM Express Modules, Test & Measurement PCIe Link Analyzers.
Server Motherboard PCIe Reference Clock Distribution
The 9DML0441AKILF selects between the BMC-generated PCIe reference and the main PCH reference, then fans out to the root complex, PCIe switch and on-board retimers. Its integrated 100 Ω terminations eliminate 16 source-termination resistors per board and its PCIe Gen 1-5 CC/SRnS/SRIS compliance lets the same SKU ship across Gen 4 and Gen 5 server platforms. Per-output OE# enables unused slots to be powered down at 79 mW typical consumption.
Recomendado
NVMe SSD Controller Clock Tree
Enterprise NVMe SSDs need a jitter-clean PCIe reference at the controller PHY. The 9DML0441AKILF supplies four HCSL outputs from one selected reference, supporting Gen 4 (16 GT/s) and Gen 5 (32 GT/s) link training. Glitch-free switching avoids runt pulses during reference changeover, which would otherwise force an LTSSM retrain and degrade IOPS. The 4 × 4 mm package fits M.2 and U.2 form-factor PCB area budgets.
Recomendado
PCIe Switch and Retimer Reference Fanout
PCIe switches and retimers consume multiple PCIe references: upstream to the root complex and downstream to each endpoint. The 9DML0441AKILF provides four HCSL outputs with selectable input, supporting hot-plug events where the upstream reference may momentarily disappear. SRIS compatibility is critical when the switch must operate in SRIS mode across long channels.
Recomendado
Workstation Add-in Card PCIe Compliance
Workstation graphics and accelerator cards require a clean 100 MHz PCIe reference at the edge connector for clock-data recovery. The 9DML0441AKILF provides glitch-free input muxing so the card can boot from an auxiliary local oscillator and seamlessly switch to the system reference once enumerated, satisfying PCI-SIG compliance margin requirements.
Recomendado
Embedded Computing and COM Express Modules
COM Express and embedded modules integrate CPU, chipset and PCIe links on a small carrier; the 9DML0441AKILF routes the PCIe reference between internal and external connectors. The 24-VFQFPN footprint and -40 °C to +85 °C operating range suit industrial temperature embedded designs requiring PCIe Gen 4/5 connectivity.
Recomendado
Test & Measurement PCIe Link Analyzers
PCIe protocol analyzers need a clean, glitch-free reference to capture compliance traffic without LTSSM disruptions. The 9DML0441AKILF's selectable asynchronous or glitch-free switching lets the analyzer toggle between system-under-test and compliance references without resetting the link, while four outputs drive multiple acquisition channels simultaneously.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para 9DML0441AKILF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 9DML0451AKILF | 9DML0441BKILF | 9DBL0241AKILF | 9FGV0241AKILF | 9DBL0841AKILF |
|---|---|---|---|---|---|---|
| Package | 24-VFQFPN (4x4 mm) | 24-VFQFPN (4x4 mm) - same | 24-VFQFPN (4x4 mm) - same | 24-VFQFPN (4x4 mm) - same | 24-VFQFPN (4x4 mm) - same | 24-VFQFPN (4x4 mm) - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Function | 2:4 PCIe Gen 1-5 Mux | 2:4 PCIe Gen 1-5 Mux | 2:4 PCIe Gen 1-5 Mux | 2:4 PCIe Gen 1-3 Fanout Buffer | 2:4 PCIe Gen 1-5 Fanout Buffer | 1:4 PCIe Gen 1-3 Fanout Buffer |
| Output Impedance | 100 Ω | 85 Ω | 100 Ω | 100 Ω | 100 Ω | 100 Ω |
| PCIe Generation Support | Gen 1-5 | Gen 1-5 | Gen 1-5 | Gen 1-3 | Gen 1-5 | Gen 1-3 |
| Number of Inputs | 2 | 2 | 2 | 2 | 2 | 1 |
| Number of Outputs | 4 differential | 4 differential | 4 differential | 4 differential | 4 differential | 4 differential |
| Switching Mode | Async or glitch-free gapped | Async or glitch-free gapped | Async or glitch-free gapped | Async or glitch-free | Async or glitch-free | Async only |
| SRIS Support | Yes | Yes | Yes | No | Yes | No |
Principais diferenciais
- Integrated 100 Ω output terminations eliminate 16 external resistors (vs 9DBL0241AKILF)
- PCIe Gen 1-5 compliance with SRIS support (vs 9DBL0841AKILF)
- Glitch-free gapped-clock switching for redundant references (vs 9FGV0241AKILF)
Notas de projeto
Route the four HCSL differential outputs as 100 Ω differential pairs with controlled impedance; keep pair-to-pair skew below 5 ps and total length matched to the PCIe endpoint within 25 mils. Place the device close to the CPU/root-complex to minimize input trace length, since HCSL is not a long-reach standard.
Place a 0.1 μF AC-coupling capacitor in series with each differential output as close to the receiver as possible. PCIe base specification requires AC coupling at the receiver; the integrated 100 Ω source termination in the 9DML0441AKILF eliminates external source-termination resistors but does not replace the AC-coupling caps.
Do not select the glitch-free switching mode at power-up if both inputs may not be running - the device requires both references active for glitch-free operation. Use asynchronous mode for cold-start or single-reference designs, then transition to glitch-free once both inputs are stable. Failing to do so can cause runt pulses during boot.
Estimated: at 3.3 V supply, 79 mW typical consumption, the 24-VFQFPN package dissipates roughly 80 mW across a 4 × 4 mm PCB footprint. Junction-to-ambient thermal resistance is approximately 60 °C/W on a 4-layer JEDEC test board, resulting in a 4-5 °C junction temperature rise at room ambient - well within the -40 °C to +85 °C operating range. No external heatsink is required.
Informações de conformidade
RoHS compliant per Renesas/IDT product page. Industrial temperature range -40 °C to +85 °C. AEC-Q100 not applicable (clock buffer is not an automotive-qualified part in this family).
