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

Renesas 8N4Q001EG-1108CDI

Name: 8N4Q001EG-1108CDI
Brand: Renesas
SKU: 8N4Q001EG-1108CDI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8N4Q001EG-1108CDI

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 10-CLCC

Datasheet:: 8N4Q001EG-1108CDI.pdf

Description:: IC OSC CLOCK QD FREQ 10CLCC

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Product details

Overview

8N4Q001EG-1108CDI 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 0.253 ps RMS phase jitter at 156.25 MHz (12 kHz–20 MHz), 2.5 V/3.3 V supply support, and -40°C to +85°C operation - deployed in wireless infrastructure baseband timing and telecom line-card synchronization.

For engineers reviewing the 8N4Q001EG-1108CDI datasheet, 8N4Q001EG-1108CDI pinout, 8N4Q001EG-1108CDI application, or 8N4Q001EG-1108CDI equivalent, this page delivers verified frequency programming resolution (435.9 Hz ÷ N), I²C-configurable PLL registers (P/MINT/MFRAC/N), FSEL0/FSEL1-selectable default frequencies, LVDS output compliance, and industrial-grade thermal performance (θJA = 49.4°C/W).

Technical Context

The 8N4Q001EG-1108CDI integrates a 1950–2600 MHz VCO with fractional-N PLL architecture, using a 100 MHz crystal reference (order code "1xxx" confirms integer PLL feedback mode by default) and configurable pre-divider (P), feedback divider (MINT + MFRAC), and post-divider (N) to synthesize precise output frequencies. Its four independent register sets (P₀–P₃, MINT₀–MINT₃, etc.) are mapped to FSEL[1:0] for hardware-selectable power-up states.

I²C interface (SCLK/SDATA) enables runtime reprogramming of all PLL registers, while OE pin provides asynchronous LVDS output enable/disable control. Internal pulldown/pullup resistors on FSEL0/FSEL1/OE and LVCMOS/LVTTL-compatible logic thresholds ensure robust digital control across both 2.5 V and 3.3 V supply modes.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Frequency Range	15.476–866.67 MHz and 975–1300 MHz - supports multi-standard sync in 5G RU, CPRI, and OTN systems
RMS Phase Jitter (156.25 MHz)	0.253 ps (12 kHz–20 MHz, integer PLL) - meets SONET OC-192 and 10G Ethernet jitter budgets
Frequency Resolution	435.9 Hz ÷ N (N = post-divider) - enables sub-Hz tuning granularity for precision frequency planning
Supply Voltage	2.5 V ±5% or 3.3 V ±5% - dual-rail compatibility simplifies power domain integration
Operating Temperature	-40°C to +85°C - qualified for industrial ambient conditions in outdoor telecom cabinets
Output Interface	LVDS differential pair (Q/nQ) - provides noise-immune, low-skew clock distribution to FPGA/ASIC receivers
Package	10-lead ceramic, 5 mm × 7 mm × 1.55 mm (CD package) - RoHS 6-compliant, high thermal reliability

Pinout & Package

8N4Q001EG-1108CDI is housed in a lead-free 10-lead ceramic CD package (5 mm × 7 mm × 1.55 mm) with exposed pad not electrically connected. Pin 1 (DNU) is unused; pins 4–5 (FSEL0/FSEL1) select one of four factory-programmed PLL configurations at power-up; pins 6–7 (Q/nQ) deliver complementary LVDS clock outputs; pin 2 (OE) enables/disables outputs asynchronously; pins 9–10 (SDATA/SCLK) form the I²C programming interface.

Pin/Terminal	Circuit Role	Design Meaning
DNU (1)	Do-not-use terminal	No connection required; floating or grounded - no functional impact
OE (2)	Asynchronous output enable	High = Q/nQ active; low = high-impedance - supports dynamic clock gating without PLL reset
GND (3)	Power ground reference	Primary return path for VDD and LVDS output current - must be low-inductance plane
FSEL0 (4)	Frequency select input 0	LSB of 2-bit hardware frequency selector - internal pulldown ensures defined state if unconnected
FSEL1 (5)	Frequency select input 1	MSB of 2-bit hardware frequency selector - pairs with FSEL0 to choose P₀–P₃ register set
Q (6)	LVDS clock output (+)	Differential LVDS signal with 247–454 mV swing and 1.0–1.375 V common-mode - requires 100 Ω termination
nQ (7)	LVDS clock output (−)	Complementary LVDS output - matched trace length critical for skew control
VDD (8)	Power supply input	Accepts 2.5 V or 3.3 V - decoupling (0.1 µF + 10 µF) required per datasheet layout guidelines
SDATA (9)	I²C data bidirectional	Open-drain, pullup-enabled interface - supports standard/fast-mode I²C writes to PLL registers
SCLK (10)	I²C clock input	Master-generated clock - synchronizes register reads/writes; internal pullup ensures idle-high state

Key Features

Feature	Design Value
Quad default-frequency selection via FSEL[1:0]	Hardware-selectable startup frequencies eliminate boot-time I²C initialization delay
Fractional-N PLL with delta-sigma modulation	Enables ultra-fine frequency resolution (≤218 Hz step) while suppressing quantization noise
I²C-programmable P/MINT/MFRAC/N registers	Allows field reconfiguration of all four PLL profiles without changing hardware or firmware
LVDS output with 45–55% duty cycle	Ensures minimal jitter contribution from asymmetry in high-speed serial link clock recovery
Internal 100 MHz crystal reference (1xxx order code)	Guarantees stable, low-phase-noise reference without external XTAL placement or matching

Applications

Wireless Baseband Unit Timing	Optical Transport Network (OTN) Line Cards
Use Scenario: Synchronizing multi-core DSPs and ADC/DACs in 5G massive MIMO radio units requiring <100 fs jitter at 122.88 MHz and 245.76 MHz. IC Role / Device Role / Timing Role: Primary low-jitter clock source generating multiple synchronized frequencies via FSEL-selectable PLL profiles. Use Value: Eliminates need for discrete oscillators and clock buffers - reduces BOM count and PCB area while meeting 3GPP TR 38.803 phase noise requirements.	Use Scenario: Providing synchronous clocking for OTU2/OTU3 framer ICs and SerDes in metro DWDM line cards operating at -40°C to +85°C. IC Role / Device Role / Timing Role: Programmable XO delivering 156.25 MHz and 125 MHz with ±20 ppm stability (K option) for G.709 frame alignment. Use Value: Factory-programmed dual-frequency profiles reduce configuration overhead; LVDS output ensures clean edge integrity over backplane traces.
Enterprise Switch Fabric Clocking	Test & Measurement Equipment Synthesis
Use Scenario: Generating 100 MHz, 125 MHz, 156.25 MHz, and 312.5 MHz clocks for switch ASICs, packet processors, and PHYs in Layer-3 data center switches. IC Role / Device Role / Timing Role: Quad-frequency XO acting as central timing hub - selected via FSEL pins during system boot or dynamically via I²C during traffic load changes. Use Value: Single-component solution replaces four discrete XOs, lowering supply current (155–160 mA) and easing thermal management in dense switch modules.	Use Scenario: Serving as tunable reference oscillator in high-resolution spectrum analyzers and arbitrary waveform generators requiring sub-Hz frequency agility. IC Role / Device Role / Timing Role: I²C-reprogrammable clock source enabling real-time frequency sweeps and custom waveform synthesis clocking. Use Value: 435.9 Hz ÷ N resolution allows precise stimulus generation for EMI testing and jitter tolerance validation per IEEE 802.3bj.

Wireless Baseband Unit Timing

Optical Transport Network (OTN) Line Cards

Use Scenario: Synchronizing multi-core DSPs and ADC/DACs in 5G massive MIMO radio units requiring <100 fs jitter at 122.88 MHz and 245.76 MHz.

IC Role / Device Role / Timing Role: Primary low-jitter clock source generating multiple synchronized frequencies via FSEL-selectable PLL profiles.

Use Value: Eliminates need for discrete oscillators and clock buffers - reduces BOM count and PCB area while meeting 3GPP TR 38.803 phase noise requirements.

Use Scenario: Providing synchronous clocking for OTU2/OTU3 framer ICs and SerDes in metro DWDM line cards operating at -40°C to +85°C.

IC Role / Device Role / Timing Role: Programmable XO delivering 156.25 MHz and 125 MHz with ±20 ppm stability (K option) for G.709 frame alignment.

Use Value: Factory-programmed dual-frequency profiles reduce configuration overhead; LVDS output ensures clean edge integrity over backplane traces.

Enterprise Switch Fabric Clocking

Test & Measurement Equipment Synthesis

Use Scenario: Generating 100 MHz, 125 MHz, 156.25 MHz, and 312.5 MHz clocks for switch ASICs, packet processors, and PHYs in Layer-3 data center switches.

IC Role / Device Role / Timing Role: Quad-frequency XO acting as central timing hub - selected via FSEL pins during system boot or dynamically via I²C during traffic load changes.

Use Value: Single-component solution replaces four discrete XOs, lowering supply current (155–160 mA) and easing thermal management in dense switch modules.

Use Scenario: Serving as tunable reference oscillator in high-resolution spectrum analyzers and arbitrary waveform generators requiring sub-Hz frequency agility.

IC Role / Device Role / Timing Role: I²C-reprogrammable clock source enabling real-time frequency sweeps and custom waveform synthesis clocking.

Use Value: 435.9 Hz ÷ N resolution allows precise stimulus generation for EMI testing and jitter tolerance validation per IEEE 802.3bj.

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; wider range (0.16–350 MHz); higher power (220 mA); QFN-24 package	Supports multi-output fanout; less suitable for single-LVDS, high-frequency (>800 MHz) use cases	Choose when multiple synchronized clocks or lower-frequency flexibility outweigh size/power trade-offs
AK2104A-1000BDI	Single-output LVDS XO; fixed 100 MHz; ±20 ppm stability; same CD package; no I²C or FSEL	Non-programmable; lacks quad-frequency selection and field reconfigurability	Choose only for cost-sensitive, static-frequency deployments where programmability adds no value

Compared with Si5338A-B-GM and AK2104A-1000BDI, the 8N4Q001EG-1108CDI uniquely balances single-LVDS high-frequency capability (up to 1.3 GHz), hardware-selectable defaults, and compact ceramic packaging - making it optimal for space-constrained, multi-standard telecom timing where field programmability and jitter performance are jointly critical.

Availability

8N4Q001EG-1108CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, and enterprise switching applications requiring stable component supply, long-lifecycle availability, and guaranteed RoHS 6 compliance.

Supply support for 8N4Q001EG-1108CDI 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 (formerly IDT) is a global semiconductor leader specializing in timing, analog, and embedded processing solutions, with deep expertise in high-performance clock generation and synchronization.

The 8N4Q001EG-1108CDI belongs to Renesas' FemtoClock® NG programmable XO product line, engineered specifically for demanding telecom, networking, and wireless infrastructure applications requiring low phase noise, flexible frequency provisioning, and industrial temperature resilience.

FAQ

What is the factory-default output frequency configuration for 8N4Q001EG-1108CDI?

The "1108" in 8N4Q001EG-1108CDI indicates an order code where "1108" maps to four factory-programmed frequencies - confirmed as 100 MHz, 122.88 MHz, 125 MHz, and 156.25 MHz per IDT's FemtoClock NG Ordering Product Information document. These are loaded into P₀–P₃ registers and selected at power-up via FSEL[1:0]. The 8N4Q001EG-1108CDI uses a 100 MHz crystal reference and integer PLL feedback mode by default.

Does 8N4Q001EG-1108CDI support fractional-N PLL operation, and how is it enabled?

Yes, the 8N4Q001EG-1108CDI supports fractional-N PLL operation via its 18-bit MFRAC register, but the "1108" order code configures it for integer-only feedback (DSM_ENA = 0, ADC_EN = 0) by default. To enable fractional mode, users must write non-zero values to MFRACn registers via I²C and configure DSM_ENA accordingly - though doing so increases phase noise versus the integer mode used in 8N4Q001EG-1108CDI's certified performance specs.

What is the maximum allowable junction temperature for 8N4Q001EG-1108CDI, and how is it calculated?

The maximum recommended junction temperature for 8N4Q001EG-1108CDI is 125°C. Using θJA = 49.4°C/W (still air, multilayer PCB), VDD = 3.465 V, and IDD = 160 mA, power dissipation is 554.4 mW. At TA = 85°C, Tj = 85 + (0.554 × 49.4) = 112.4°C - safely below the limit. This calculation applies directly to the 8N4Q001EG-1108CDI under full-load conditions per its datasheet thermal model.

Can the 8N4Q001EG-1108CDI be operated with only a 2.5 V supply, and what are the implications?

Yes, the 8N4Q001EG-1108CDI fully supports 2.5 V ±5% operation per Table 5B, drawing 155 mA typical. All specifications - including LVDS output voltage (247–454 mV), phase jitter (0.253 ps at 156.25 MHz), and input thresholds - are guaranteed across both 2.5 V and 3.3 V rails. The "E" in 8N4Q001EG-1108CDI denotes ±50 ppm stability, valid under either supply voltage.

How does the OE pin function on 8N4Q001EG-1108CDI, and is it compatible with hot-swap systems?

The OE (Output Enable) pin on 8N4Q001EG-1108CDI is an asynchronous, LVCMOS/LVTTL-compatible control that places Q/nQ outputs in high-impedance state when low - enabling safe clock domain isolation during hot-swap or power sequencing. With internal pullup, OE defaults to '1' (enabled) at power-up. Its 500 µA max low-current rating and -0.3 V to VDD+0.3 V absolute max ratings make it robust for hot-swap use cases in 8N4Q001EG-1108CDI-based systems.

8N4Q001EG-1108CDI 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

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:: -

8N4Q001EG-1108CDI FAQ

1.How can I place an order for 8N4Q001EG-1108CDI through Aetrix?

Please submit a Request for Quotation (RFQ) for 8N4Q001EG-1108CDI 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 8N4Q001EG-1108CDI reliable?

The price and inventory of 8N4Q001EG-1108CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N4Q001EG-1108CDI is usually 5 days.

3.What payment methods are accepted for 8N4Q001EG-1108CDI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N4Q001EG-1108CDI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 8N4Q001EG-1108CDI?

8N4Q001EG-1108CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 8N4Q001EG-1108CDI 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 8N4Q001EG-1108CDI?

For technical support, including 8N4Q001EG-1108CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N4Q001EG-1108CDI requirements.

6.How does Aetrix verify that 8N4Q001EG-1108CDI is sourced from the original manufacturer or authorized distributors?

All 8N4Q001EG-1108CDI 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 8N4Q001EG-1108CDI meets industry standards.

7.What is the process for return or replacement of 8N4Q001EG-1108CDI?

All 8N4Q001EG-1108CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N4Q001EG-1108CDI, 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 8N4Q001EG-1108CDI part is unused and in its original packaging.

Return procedure for 8N4Q001EG-1108CDI:

1.Submit a request within 90 days.

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

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