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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Programmable Timers and Oscillators

Renesas 8N4Q001KG-2201CDI

Name: 8N4Q001KG-2201CDI
Brand: Renesas
SKU: 8N4Q001KG-2201CDI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8N4Q001KG-2201CDI

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 10-CLCC

Datasheet:: 8N4Q001KG-2201CDI.pdf

Description:: CLCC 7.00X5.00X1.50 MM, 2.54MM P

Quantity:: RFQ Add To RFQ list

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Product details

Overview

8N4Q001KG-2201CDI from Renesas (formerly IDT) is a quad-frequency programmable XO using fourth-generation FemtoClock® NG technology, delivering LVDS clock outputs from 15.476 MHz to 866.67 MHz and 975 MHz to 1,300 MHz with RMS phase jitter as low as 0.253 ps at 156.25 MHz (12 kHz–20 MHz). It operates from 2.5 V or 3.3 V supply and features I²C programmability and dual FSEL control inputs for four factory-default frequencies. It is deployed in wireless infrastructure baseband timing and telecom line-card synchronization.

For engineers reviewing the 8N4Q001KG-2201CDI datasheet, 8N4Q001KG-2201CDI pinout, 8N4Q001KG-2201CDI application, or 8N4Q001KG-2201CDI equivalent, this page provides verified specifications, package mapping, I²C register architecture, LVDS output compliance, and validated alternative XO options - all confirmed against the official IDT8N4Q001 REV G datasheet and Renesas product documentation.

Technical Context

The 8N4Q001KG-2201CDI integrates a 1950–2600 MHz VCO with fractional-N PLL architecture, using a 114.285 MHz crystal reference (per order code 2201), 7-bit post-divider (N), 25-bit feedback divider (7-bit MINT + 18-bit MFRAC), and 2-bit pre-divider (P). Its four independent configuration registers (P₀–P₃, MINT₀–MINT₃, etc.) are selected via FSEL0/FSEL1 and reprogrammable over I²C.

It supports integer PLL mode (lower phase noise, e.g., 0.253 ps RMS @156.25 MHz) and fractional mode (wider frequency coverage), with frequency resolution of 435.9 Hz ÷ N. Output enable (OE) is asynchronous, and all control inputs (FSEL0/FSEL1/OE/SCLK/SDATA) are LVCMOS/LVTTL-compatible with internal pullups/pulldowns.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Type	Single LVDS differential pair (Q/nQ), compliant with ANSI TIA/EIA-644-A
Frequency Range	15.476–866.67 MHz and 975–1300 MHz; covers Ethernet, CPRI, OTU4, and SerDes reference clocks
RMS Phase Jitter	0.253 ps @156.25 MHz (12 kHz–20 MHz, integer PLL); meets SONET OC-192 and 10GBase-R jitter specs
Supply Voltage	2.5 V ±5% or 3.3 V ±5%; dual-mode support enables drop-in replacement across voltage-scaled systems
Operating Temp	−40°C to +85°C (industrial grade); validated for wireless remote radio units and carrier-grade switches
Package	10-lead RoHS-compliant ceramic (5 mm × 7 mm × 1.55 mm, CD package); optimized for thermal stability and board-level EMI control
Control Interface	I²C (SCLK/SDATA) + 2-pin FSEL selection; enables field reconfiguration without firmware update or hardware change

Pinout & Package

10-lead ceramic CD package (5 mm × 7 mm × 1.55 mm), RoHS 6-compliant, with exposed pad not connected. Pin 1 (DNU) is unused; pins 4–5 (FSEL0/FSEL1) and 2 (OE) are LVCMOS/LVTTL with internal pulldowns/pullups; pins 6–7 (Q/nQ) deliver LVDS output with 247–454 mV differential swing and 1.0–1.375 V common-mode offset.

Pin/Terminal	Circuit Role	Design Meaning
DNU (1)	No-connect	Must be left floating or tied to GND; no internal connection
OE (2)	Asynchronous output enable	Pullup default; drives Q/nQ into high-Z when low; critical for hot-swap and power sequencing
GND (3)	Power ground	Primary return path for VDD and LVDS output current; requires low-inductance PCB stitching
FSEL0 (4)	Frequency select bit 0	Pulldown; selects one of four factory-programmed PLL configurations on power-up
FSEL1 (5)	Frequency select bit 1	Pulldown; used with FSEL0 to index P₀–P₃, MINT₀–MINT₃, and N₀–N₃ registers
Q (6)	LVDS positive output	247–454 mV differential swing; requires 100 Ω termination to VDD/2 at receiver
nQ (7)	LVDS negative output	Complementary to Q; forms true differential pair meeting jitter and EMI requirements
VDD (8)	Power supply	Accepts 2.5 V or 3.3 V; requires local 0.1 µF + 10 µF decoupling per datasheet layout guidelines
SDATA (9)	I²C data input	Pullup; bidirectional I²C bus line; supports standard-mode (100 kHz) and fast-mode (400 kHz)
SCLK (10)	I²C clock input	Pullup; synchronous clock for I²C register writes; must be driven by open-drain master

Key Features

Feature	Design Value
Quad default frequency selection	Four factory-programmed PLL configurations (P₀/MINT₀/MFRAC₀/N₀ through P₃/MINT₃/MFRAC₃/N₃) selected by FSEL[1:0], enabling boot-time clock source flexibility without I²C traffic
Fractional-N synthesis resolution	435.9 Hz ÷ N step size (N = post-divider); allows precise alignment to standards like 156.25 MHz (10GBASE-R), 122.88 MHz (CPRI), and 100.000 MHz (PCIe)
Low-phase-noise integer PLL mode	0.253 ps RMS jitter @156.25 MHz (12 kHz–20 MHz) in integer mode; satisfies stringent OC-192 and SyncE wander requirements
LVDS output compliance	Meets ANSI TIA/EIA-644-A: 247–454 mV differential swing, 1.0–1.375 V common-mode, <425 ps rise/fall time; ensures signal integrity over 15 cm FR4 traces
Volatile I²C register architecture	All four PLL configuration registers are volatile; reloaded from factory defaults on power cycle - prevents unintended frequency changes during brownout recovery

Applications

Wireless Baseband Unit	Optical Transport Line Card
Use Scenario: Synchronizing FPGA-based digital front-end (DFE) and analog front-end (AFE) in 5G massive MIMO radios requiring multiple coherent clock domains. IC Role / Device Role / Timing Role: Primary reference oscillator providing 122.88 MHz (CPRI), 156.25 MHz (eCPRI), and 245.76 MHz (O-RAN) simultaneously via FSEL switching. Use Value: Eliminates need for multiple discrete XOs; reduces BOM count and board area while maintaining sub-0.3 ps jitter across all frequencies.	Use Scenario: Clocking OTU4 (111.81 Gbps) framer ASICs and FEC engines in metro DWDM transport platforms. IC Role / Device Role / Timing Role: Low-jitter LVDS clock source for SerDes CDR circuits, operating at 156.25 MHz with integer PLL configuration. Use Value: 0.253 ps RMS phase jitter meets ITU-T G.823/G.825 mask for SDH/SONET applications, enabling error-free 100+ km transmission.
Enterprise Switch Fabric	Industrial Ethernet Gateway
Use Scenario: Providing reference clocks to multi-port 10G/25G Ethernet PHYs and packet buffer controllers in Layer-3 spine switches. IC Role / Device Role / Timing Role: Programmable clock generator delivering 156.25 MHz (10GBASE-R), 312.5 MHz (25GBASE-R), and 625 MHz (50GBASE-R) via I²C reprogramming. Use Value: Single device replaces three fixed-frequency XOs; simplifies inventory and supports future speed upgrades without hardware change.	Use Scenario: Timing industrial PROFINET IRT or TSN endpoints where deterministic latency and sub-microsecond synchronization are required. IC Role / Device Role / Timing Role: Temperature-stable (±20 ppm, option K) clock source for IEEE 1588 PTP grandmaster clock modules. Use Value: −40°C to +85°C operation and 0.263 ps RMS jitter (1 kHz–40 MHz) ensure PTP timestamp accuracy under factory ambient conditions.

Wireless Baseband Unit

Optical Transport Line Card

Use Scenario: Synchronizing FPGA-based digital front-end (DFE) and analog front-end (AFE) in 5G massive MIMO radios requiring multiple coherent clock domains.

IC Role / Device Role / Timing Role: Primary reference oscillator providing 122.88 MHz (CPRI), 156.25 MHz (eCPRI), and 245.76 MHz (O-RAN) simultaneously via FSEL switching.

Use Value: Eliminates need for multiple discrete XOs; reduces BOM count and board area while maintaining sub-0.3 ps jitter across all frequencies.

Use Scenario: Clocking OTU4 (111.81 Gbps) framer ASICs and FEC engines in metro DWDM transport platforms.

IC Role / Device Role / Timing Role: Low-jitter LVDS clock source for SerDes CDR circuits, operating at 156.25 MHz with integer PLL configuration.

Use Value: 0.253 ps RMS phase jitter meets ITU-T G.823/G.825 mask for SDH/SONET applications, enabling error-free 100+ km transmission.

Enterprise Switch Fabric

Industrial Ethernet Gateway

Use Scenario: Providing reference clocks to multi-port 10G/25G Ethernet PHYs and packet buffer controllers in Layer-3 spine switches.

IC Role / Device Role / Timing Role: Programmable clock generator delivering 156.25 MHz (10GBASE-R), 312.5 MHz (25GBASE-R), and 625 MHz (50GBASE-R) via I²C reprogramming.

Use Value: Single device replaces three fixed-frequency XOs; simplifies inventory and supports future speed upgrades without hardware change.

Use Scenario: Timing industrial PROFINET IRT or TSN endpoints where deterministic latency and sub-microsecond synchronization are required.

IC Role / Device Role / Timing Role: Temperature-stable (±20 ppm, option K) clock source for IEEE 1588 PTP grandmaster clock modules.

Use Value: −40°C to +85°C operation and 0.263 ps RMS jitter (1 kHz–40 MHz) ensure PTP timestamp accuracy under factory ambient conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable XO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5338A-B-GM	4-output, I²C-programmable, 0.17 ps RMS jitter @156.25 MHz; requires external crystal; larger 4×4 mm QFN package	Supports multi-output fanout and jitter cleaning; better suited for systems needing >1 clock domain	Select Si5338A-B-GM when multi-output capability or ultra-low jitter (<0.2 ps) is mandatory; avoid if single-LVDS output and minimal footprint are priorities.
8A34002NLGI	2-output, JESD204B-compliant, 0.22 ps RMS jitter @156.25 MHz; integrated crystal; 5×7 mm ceramic package same as 8N4Q001KG-2201CDI	Designed for high-speed data converter timing; includes JESD204B SYSREF generation and deterministic latency	Choose 8A34002NLGI for ADC/DAC timing with JESD204B; retain 8N4Q001KG-2201CDI for general-purpose quad-frequency XO use with simpler register map.

Compared with Si5338A-B-GM and 8A34002NLGI, the 8N4Q001KG-2201CDI offers the smallest footprint among programmable XOs with quad-default capability, lowest I²C register complexity, and optimal cost-performance balance for single-output, industrial-temperature wireless and telecom timing - without requiring external components or advanced protocol support.

Availability

8N4Q001KG-2201CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport, enterprise switching, and industrial Ethernet applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant ceramic-packaged timing solutions.

Supply support for 8N4Q001KG-2201CDI 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 formed from the merger of Renesas Technology and NEC Electronics, specializing in microcontrollers, analog, power, and timing solutions.

The 8N4Q001KG-2201CDI belongs to Renesas' FemtoClock® NG programmable XO family, engineered for high-frequency, low-jitter clock generation in wireless, telecom, and networking equipment where precision, flexibility, and industrial reliability are essential.

FAQ

What is the crystal reference frequency used by the 8N4Q001KG-2201CDI?

The 8N4Q001KG-2201CDI uses an internal 114.285 MHz fundamental-mode crystal, as indicated by the order code "2201" (per IDT8N4Q001 REV G datasheet Table 3B and Ordering Information section). This reference feeds the FemtoClock® NG PLL, enabling the specified output ranges of 15.476–866.67 MHz and 975–1300 MHz. The 8N4Q001KG-2201CDI does not require an external crystal.

Does the 8N4Q001KG-2201CDI support both integer and fractional PLL modes?

Yes, the 8N4Q001KG-2201CDI supports both integer and fractional PLL feedback modes. Integer mode delivers lower phase noise (e.g., 0.253 ps RMS @156.25 MHz), while fractional mode enables finer frequency resolution and broader coverage. Mode selection is configured via the DSM_ENA and ADC_EN bits in the I²C registers, as documented in the FemtoClock NG Programming Guide referenced in the 8N4Q001KG-2201CDI datasheet.

What is the function of the DNU pin (Pin 1) on the 8N4Q001KG-2201CDI?

Pin 1 of the 8N4Q001KG-2201CDI is marked DNU (Do Not Use) and has no internal connection. It must remain unconnected - neither tied to VDD nor GND. Leaving it floating is acceptable per the datasheet; adding a pullup or pulldown resistor is unnecessary and may risk unintended coupling. This pin serves no electrical or mechanical purpose in the 8N4Q001KG-2201CDI.

Can the 8N4Q001KG-2201CDI be operated from a 2.5 V supply?

Yes, the 8N4Q001KG-2201CDI fully supports 2.5 V ±5% operation, as confirmed in DC Electrical Characteristics Tables 5B and 5C of the datasheet. At 2.5 V, typical supply current is 155 mA, and all I/O levels (FSEL0/FSEL1/OE/SCLK/SDATA) remain LVCMOS/LVTTL-compatible. The LVDS output maintains full specification compliance, including 247–454 mV differential swing and 1.0–1.375 V common-mode voltage.

How does the OE (Output Enable) pin behave on the 8N4Q001KG-2201CDI?

The OE pin (Pin 2) is an asynchronous, LVCMOS/LVTTL-compatible input with internal pullup. When OE = 0, the Q/nQ LVDS outputs enter high-impedance state; when OE = 1 (default), outputs are active. No delay or synchronization is required - state change is immediate. The 8N4Q001KG-2201CDI datasheet confirms OE functionality in Table 3A and specifies that it operates across the full −40°C to +85°C temperature range.

8N4Q001KG-2201CDI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: FemtoClock® NG

Package/Case:: 10-CLCC

Packaging:: Tray

Product Status:: Active

Type:: Clock Oscillator

Count:: -

Frequency:: 100MHz, 156.25MHz, 161.133MHz, 174.703MHz

Voltage - Supply:: 3.135V ~ 3.465V

Current - Supply:: 160 mA

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 10-CLCC (7x5)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

8N4Q001KG-2201CDI FAQ

1.How can I place an order for 8N4Q001KG-2201CDI through Aetrix?

Please submit a Request for Quotation (RFQ) for 8N4Q001KG-2201CDI 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 8N4Q001KG-2201CDI reliable?

The price and inventory of 8N4Q001KG-2201CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N4Q001KG-2201CDI is usually 5 days.

3.What payment methods are accepted for 8N4Q001KG-2201CDI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N4Q001KG-2201CDI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 8N4Q001KG-2201CDI?

8N4Q001KG-2201CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 8N4Q001KG-2201CDI 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 8N4Q001KG-2201CDI?

For technical support, including 8N4Q001KG-2201CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N4Q001KG-2201CDI requirements.

6.How does Aetrix verify that 8N4Q001KG-2201CDI is sourced from the original manufacturer or authorized distributors?

All 8N4Q001KG-2201CDI 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 8N4Q001KG-2201CDI meets industry standards.

7.What is the process for return or replacement of 8N4Q001KG-2201CDI?

All 8N4Q001KG-2201CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N4Q001KG-2201CDI, 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 8N4Q001KG-2201CDI part is unused and in its original packaging.

Return procedure for 8N4Q001KG-2201CDI:

1.Submit a request within 90 days.

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

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