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

Renesas 8N3Q001FG-1078CDI8

Name: 8N3Q001FG-1078CDI8
Brand: Renesas
SKU: 8N3Q001FG-1078CDI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8N3Q001FG-1078CDI8

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 10-CLCC

Datasheet:: 8N3Q001FG-1078CDI8.pdf

Description:: IC OSC CLOCK QD FREQ 10CLCC

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Product details

Overview

8N3Q001FG-1078CDI8 from Integrated Device Technology is a quad-frequency programmable crystal oscillator (XO) using fourth-generation FemtoClock® NG PLL technology. It delivers one LVPECL differential clock output with programmable frequencies from 15.476 MHz to 866.67 MHz and 975 MHz to 1,300 MHz, RMS phase jitter as low as 0.244 ps (12 kHz–20 MHz), and operates across –40°C to +85°C. It serves as a high-stability timing source in wireless infrastructure baseband units requiring multi-standard frequency agility.

For engineers reviewing the 8N3Q001FG-1078CDI8 datasheet, 8N3Q001FG-1078CDI8 pinout, 8N3Q001FG-1078CDI8 application, or 8N3Q001FG-1078CDI8 equivalent, this page provides verified technical context, validated pin functions, confirmed frequency programming resolution (435.9 Hz ÷ N), I²C register mapping for four factory-default PLL configurations, and real-world design implications of its fractional/integer PLL feedback modes.

Technical Context

The 8N3Q001FG-1078CDI8 integrates a 100 MHz or 114.285 MHz fundamental-mode crystal oscillator driving a fractional-N PLL with 25-bit M-divider (7-bit integer + 18-bit fractional), 2-bit pre-divider (P), and 7-bit post-divider (N). Its VCO operates at 1950–2600 MHz, enabling wide-range synthesis while maintaining low phase noise via delta-sigma noise shaping.

Four independent PLL configuration registers (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) are selected by FSEL0/FSEL1 pins at power-up and reprogrammable via I²C. The device supports both integer-only (lower jitter, e.g., 0.244 ps @ 156.25 MHz) and fractional feedback modes, with output enable (OE) providing asynchronous LVPECL output disable.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Type	Single LVPECL differential pair (Q/nQ), terminated to 50 Ω to VCC – 2 V - requires matched transmission line layout for signal integrity above 1 GHz.
Frequency Range	15.476–866.67 MHz and 975–1300 MHz - covers Ethernet (156.25 MHz), CPRI (307.2 MHz), OTN (1250 MHz), and wireless fronthaul standards.
RMS Phase Jitter	0.244 ps @ 156.25 MHz (12 kHz–20 MHz, integer PLL) - meets SONET OC-192 and 10G Ethernet jitter budgets without external cleanup.
Supply Voltage	2.5 V ±5% or 3.3 V ±5% - dual-voltage support enables drop-in replacement in legacy 3.3 V and modern low-power 2.5 V systems.
Operating Temp	–40°C to +85°C - qualified for industrial-grade wireless infrastructure equipment deployed in uncontrolled outdoor cabinets.
Package	10-lead RoHS-compliant ceramic (5 mm × 7 mm × 1.55 mm, CD package) - small footprint with low thermal resistance (θJA = 49.4°C/W) for dense RF board layouts.
Control Interface	I²C-compatible SCLK/SDATA with internal pullups - enables in-system frequency reconfiguration without dedicated programming hardware.

Pinout & Package

10-lead ceramic surface-mount package (CD), 5 mm × 7 mm × 1.55 mm, lead-free (RoHS 6), with exposed pad not connected internally.

Pin/Terminal	Circuit Role	Design Meaning
DNU (Pin 1)	Unused	No connection required; floating or grounded - no electrical function; PCB keep-out recommended.
OE (Pin 2)	Output Enable	Asynchronous LVCMOS/LVTTL input; high = outputs enabled, low = Q/nQ in high-Z - used for dynamic clock gating in power-sensitive systems.
VEE (Pin 3)	Negative Supply	Ground reference for LVPECL output stage - must be solidly tied to system ground plane to minimize common-mode noise on differential outputs.
FSEL0 (Pin 4)	Frequency Select 0	LVCMOS/LVTTL input with internal pulldown - selects one of four factory-programmed PLL configurations at power-up (00/01/10/11).
FSEL1 (Pin 5)	Frequency Select 1	LVCMOS/LVTTL input with internal pulldown - paired with FSEL0 to index into P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃ registers.
Q (Pin 6)	Differential Output+	LVPECL logic-high voltage ≈ VCC – 0.8 V; swing 0.55–1.0 Vpp - requires 50 Ω termination to VCC – 2 V for proper DC bias and impedance matching.
nQ (Pin 7)	Differential Output–	Complementary to Q; 180° phase inverted - used with Q for low-noise, EMI-resistant clock distribution to FPGA transceivers or SERDES PHYs.
VCC (Pin 8)	Positive Supply	2.5 V or 3.3 V main supply - requires local 0.1 µF + 10 µF decoupling per pin; ferrite bead isolation recommended for PLL noise immunity.
SDATA (Pin 9)	I²C Data I/O	Open-drain output / LVCMOS input with internal pullup - bidirectional I²C data line; requires external pullup (typically 2.2 kΩ) when used in multi-device bus.
SCLK (Pin 10)	I²C Clock Input	LVCMOS/LVTTL input with internal pullup - synchronous clock for I²C register writes; max frequency 400 kHz standard-mode.

Key Features

Feature	Design Value
Quad default-frequency selection	Four factory-programmed PLL configurations (P₀/MINT₀/MFRAC₀/N₀ through P₃/MINT₃/MFRAC₃/N₃) accessed via FSEL[1:0] - eliminates need for external configuration EEPROM in multi-standard radios.
Fractional-N PLL with delta-sigma modulation	Enables 435.9 Hz ÷ N frequency step resolution and synthesis of non-integer multiples of reference - supports precise alignment to CPRI, eCPRI, and OBSAI frame clocks.
Integer-N PLL mode	Configurable via I²C (DSM_ENA = 0, ADC_EN = 0) - reduces RMS phase jitter to 0.244 ps @ 156.25 MHz for applications demanding lowest possible jitter (e.g., 10G/25G Ethernet PHYs).
LVPECL output with integrated termination guidance	Validated 50 Ω differential drive into VCC – 2 V termination - simplifies layout for >1 GHz clock routing and meets JEDEC 65 AC timing compliance.
Volatile I²C register set	All four PLL configuration registers retain user-written values only until next power cycle - ensures safe field updates without risk of persistent misconfiguration.

Applications

Wireless Baseband Unit	Optical Transport Network (OTN)
Use Scenario: Multi-band LTE/5G macro base station supporting simultaneous TDD/FDD operation with dynamic spectrum allocation. IC Role / Device Role / Timing Role: Primary system clock generator for FPGA-based digital front-end, providing synchronized sampling clocks to multiple ADC/DAC channels and CPRI interface. Use Value: Four factory-default frequencies (e.g., 122.88 MHz, 153.6 MHz, 307.2 MHz, 614.4 MHz) allow instant reconfiguration between bands without firmware update or external clock switch.	Use Scenario: 100G/200G OTN line card requiring precise 1250 MHz or 156.25 MHz clocks for OTU4 framing and FEC processing. IC Role / Device Role / Timing Role: Low-jitter clock source for OTN mapper/demapper ASICs and SerDes lanes operating at 11.1 Gbps or 25.78 Gbps. Use Value: 0.244 ps RMS phase jitter (12 kHz–20 MHz) meets ITU-T G.823/G.825 jitter transfer and generation limits for core transport networks.
Enterprise Switching Fabric	High-Performance Test Equipment
Use Scenario: 25G/100G Ethernet top-of-rack switch with multi-rate SerDes supporting IEEE 802.3by, 802.3cd, and PAM4 modulation. IC Role / Device Role / Timing Role: Reference clock for switch fabric ASIC and PHYs, delivering synchronized 156.25 MHz, 312.5 MHz, and 625 MHz clocks across multiple voltage domains. Use Value: Dual supply (2.5 V/3.3 V) compatibility allows direct integration into legacy 3.3 V control planes and new 2.5 V high-speed I/O subsystems without level-shifting.	Use Scenario: Bit-error-rate tester (BERT) requiring ultra-low-jitter clock injection for stress testing of 28 Gbps+ receiver sensitivity. IC Role / Device Role / Timing Role: Programmable jitter source and clean reference generator - configured via I²C to output exact test frequencies (e.g., 28.05 Gbps NRZ clock) with sub-picosecond stability. Use Value: I²C reprogrammability enables automated test sequences that sweep frequencies across 15–1300 MHz range without manual oscillator swaps or external synthesizers.

Wireless Baseband Unit

Optical Transport Network (OTN)

Use Scenario: Multi-band LTE/5G macro base station supporting simultaneous TDD/FDD operation with dynamic spectrum allocation.

IC Role / Device Role / Timing Role: Primary system clock generator for FPGA-based digital front-end, providing synchronized sampling clocks to multiple ADC/DAC channels and CPRI interface.

Use Value: Four factory-default frequencies (e.g., 122.88 MHz, 153.6 MHz, 307.2 MHz, 614.4 MHz) allow instant reconfiguration between bands without firmware update or external clock switch.

Use Scenario: 100G/200G OTN line card requiring precise 1250 MHz or 156.25 MHz clocks for OTU4 framing and FEC processing.

IC Role / Device Role / Timing Role: Low-jitter clock source for OTN mapper/demapper ASICs and SerDes lanes operating at 11.1 Gbps or 25.78 Gbps.

Use Value: 0.244 ps RMS phase jitter (12 kHz–20 MHz) meets ITU-T G.823/G.825 jitter transfer and generation limits for core transport networks.

Enterprise Switching Fabric

High-Performance Test Equipment

Use Scenario: 25G/100G Ethernet top-of-rack switch with multi-rate SerDes supporting IEEE 802.3by, 802.3cd, and PAM4 modulation.

IC Role / Device Role / Timing Role: Reference clock for switch fabric ASIC and PHYs, delivering synchronized 156.25 MHz, 312.5 MHz, and 625 MHz clocks across multiple voltage domains.

Use Value: Dual supply (2.5 V/3.3 V) compatibility allows direct integration into legacy 3.3 V control planes and new 2.5 V high-speed I/O subsystems without level-shifting.

Use Scenario: Bit-error-rate tester (BERT) requiring ultra-low-jitter clock injection for stress testing of 28 Gbps+ receiver sensitivity.

IC Role / Device Role / Timing Role: Programmable jitter source and clean reference generator - configured via I²C to output exact test frequencies (e.g., 28.05 Gbps NRZ clock) with sub-picosecond stability.

Use Value: I²C reprogrammability enables automated test sequences that sweep frequencies across 15–1300 MHz range without manual oscillator swaps or external synthesizers.

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 LVDS/LVPECL programmable clock generator; integrated EEPROM; wider frequency range (0.16–350 MHz per output); higher power (120 mA typical).	Supports multi-output clock trees; suited for SoC-based systems needing multiple synchronized clocks; less optimal for single-output, ultra-low-jitter XO replacement.	Choose Si5338A-B-GM when replacing multi-clock systems or requiring non-volatile configuration storage; avoid if only one LVPECL output and minimal jitter are critical.
AK210-01-156.2500T	Fixed-frequency 156.25 MHz LVPECL XO; ±20 ppm stability; 0.3 ps RMS jitter (12 kHz–20 MHz); no I²C or frequency programming.	Drop-in replacement where only one frequency is needed; lower cost and simpler layout; lacks reconfigurability and multi-frequency agility.	Choose AK210-01-156.2500T for cost-sensitive, single-frequency deployments where field reprogramming is unnecessary and jitter margin is acceptable.

Compared with Si5338A-B-GM and AK210-01-156.2500T, the 8N3Q001FG-1078CDI8 uniquely balances single-output LVPECL performance (0.244 ps jitter), quad-frequency agility, and I²C programmability in a compact ceramic package - making it optimal for space-constrained, multi-standard wireless and optical modules requiring field-upgradable timing.

Availability

8N3Q001FG-1078CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, and enterprise switching applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant ceramic packaging.

Supply support for 8N3Q001FG-1078CDI8 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

Integrated Device Technology (IDT), now part of Renesas Electronics, designs high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT8N3Q001 product line delivers programmable XOs optimized for wireless infrastructure and telecom equipment, combining FemtoClock® NG PLL technology with flexible frequency selection to replace multiple fixed oscillators in multi-standard platforms.

FAQ

What is the factory-default frequency configuration for 8N3Q001FG-1078CDI8?

The 8N3Q001FG-1078CDI8 is factory-programmed with four default frequencies corresponding to order code "1078", indicating a 100 MHz crystal reference and integer PLL feedback mode. These frequencies are stored in registers P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, and N₀–N₃, and selected by FSEL[1:0] states 00, 01, 10, and 11. The exact values depend on the specific 1078 configuration documented in IDT's FemtoClock NG Ordering Guide.

Does 8N3Q001FG-1078CDI8 support both 2.5 V and 3.3 V operation simultaneously?

No - the 8N3Q001FG-1078CDI8 operates exclusively at either 2.5 V ±5% or 3.3 V ±5%, as defined by its option code ('F' indicates 2.5 V supply). The device does not support dual-supply operation; VCC must be connected to a single regulated rail. Both supply voltages are supported across the product family, but each individual 8N3Q001FG-1078CDI8 unit is configured for one voltage during manufacturing.

Can the 8N3Q001FG-1078CDI8 be reprogrammed in-system after soldering?

Yes - the 8N3Q001FG-1078CDI8 supports full in-system reprogramming via its I²C interface (SCLK/SDATA pins). Users can write new P, MINT, MFRAC, and N values to any of the four configuration registers and select them dynamically using FSEL[1:0]. All register contents are volatile and reset to factory defaults on power cycle, ensuring safe field updates.

What is the significance of the 'CD' package suffix in 8N3Q001FG-1078CDI8?

The 'CD' suffix in 8N3Q001FG-1078CDI8 denotes a lead-free, 10-lead ceramic package measuring 5 mm × 7 mm × 1.55 mm. This RoHS 6-compliant package offers low thermal resistance (θJA = 49.4°C/W), mechanical stability across –40°C to +85°C, and consistent high-frequency performance - essential for timing-critical wireless and optical modules where thermal drift and vibration tolerance matter.

How does the RMS phase jitter specification of 8N3Q001FG-1078CDI8 compare across frequency bands?

The 8N3Q001FG-1078CDI8 achieves 0.244 ps RMS phase jitter @ 156.25 MHz (12 kHz–20 MHz) in integer PLL mode, rising to 0.265 ps under 1 kHz–40 MHz integration. At other frequencies, jitter scales with multiplication factor and loop bandwidth: e.g., 0.350–0.555 ps for 17–125 MHz outputs, and 0.440–0.995 ps for fractional-mode synthesis. All values are measured with fXTAL = 100 MHz (order code 1xxx) and reflect actual device behavior, not typical estimates.

8N3Q001FG-1078CDI8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: FemtoClock® NG

Package/Case:: 10-CLCC

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Clock Oscillator

Count:: -

Frequency:: 100MHz, 200MHz, 300MHz, 400MHz

Voltage - Supply:: 2.375V ~ 2.625V

Current - Supply:: 136 mA

Operating Temperature:: -40°C ~ 85°C

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

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

8N3Q001FG-1078CDI8 FAQ

1.How can I place an order for 8N3Q001FG-1078CDI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 8N3Q001FG-1078CDI8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of 8N3Q001FG-1078CDI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3Q001FG-1078CDI8 is usually 5 days.

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8N3Q001FG-1078CDI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

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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 8N3Q001FG-1078CDI8?

For technical support, including 8N3Q001FG-1078CDI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3Q001FG-1078CDI8 requirements.

6.How does Aetrix verify that 8N3Q001FG-1078CDI8 is sourced from the original manufacturer or authorized distributors?

All 8N3Q001FG-1078CDI8 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 8N3Q001FG-1078CDI8 meets industry standards.

7.What is the process for return or replacement of 8N3Q001FG-1078CDI8?

All 8N3Q001FG-1078CDI8 units undergo pre-shipment inspection (PSI). If there is an issue with 8N3Q001FG-1078CDI8, 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 8N3Q001FG-1078CDI8 part is unused and in its original packaging.

Return procedure for 8N3Q001FG-1078CDI8:

1.Submit a request within 90 days.

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

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