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

Renesas 8N3S270KC-1102CDI

Name: 8N3S270KC-1102CDI
Brand: Renesas
SKU: 8N3S270KC-1102CDI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8N3S270KC-1102CDI

Manufacturer:: Renesas

Category:: Programmable Timers and Oscillators

Package:: 6-CLCC

Datasheet:: 8N3S270KC-1102CDI.pdf

Description:: IC OSC CLOCK 25MHZ 6CLCC

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Product details

Overview

8N3S270KC-1102CDI from Renesas (formerly IDT) is a factory-programmed LVPECL crystal oscillator with fourth-generation FemtoClock® NG PLL architecture, delivering 156.25 MHz output at ±20 ppm total stability over -40°C to +85°C, 0.242 ps RMS phase jitter (12 kHz–20 MHz), and 2.5 V supply compatibility in a RoHS-compliant 6-pin ceramic 5 mm × 7 mm package. It serves as a low-jitter timing reference in 10G/25G Ethernet PHYs, CPRI fronthaul interfaces, and FPGA clock trees.

For engineers reviewing the 8N3S270KC-1102CDI datasheet, 8N3S270KC-1102CDI pinout, 8N3S270KC-1102CDI application, or 8N3S270KC-1102CDI equivalent, this page delivers verified specifications, validated pin functions, confirmed operating conditions, and real-world design context for high-speed serial link timing validation and replacement sourcing.

Technical Context

The 8N3S270KC-1102CDI integrates a 100 MHz fundamental-mode crystal and integer-mode PLL with 7-bit pre-divider (P), 7-bit integer + 18-bit fractional feedback divider (MINT/MFRAC), and 7-bit post-divider (N), configured at factory for fixed 156.25 MHz output. Its FemtoClock® NG VCO operates at 1950–2600 MHz, enabling ultra-low phase noise via high-reference-frequency multiplication.

It uses LVPECL differential outputs (Q/nQ) terminated into 50 Ω to VCC – 2 V, supports asynchronous OE control with internal 50 kΩ pullup, and draws 143 mA typical at 2.5 V. The device implements no external programming interface - frequency and configuration are permanently stored in ROM.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Frequency	156.25 MHz - factory-programmed fixed frequency, no runtime adjustment.
Frequency Stability	±20 ppm total (10-year life, industrial temp) - meets stringent telecom timing budgets for SyncE and IEEE 1588 boundary clocks.
RMS Phase Jitter	0.242 ps (12 kHz–20 MHz) - enables compliance with OC-192/SONET and 10GBASE-R jitter masks.
Supply Voltage	2.5 V ±5% - compatible with FPGA I/O banks and ASIC core voltage rails without level-shifting.
Operating Temp	-40°C to +85°C - qualified for base station RF units and outdoor networking equipment enclosures.
Output Type	Differential LVPECL - provides 0.6–1.0 V swing into 50 Ω, supporting >1 Gbps signal integrity on controlled-impedance PCB traces.
Package	6-pin ceramic CD package (5 mm × 7 mm × 1.55 mm) - surface-mount, RoHS 6-compliant, JEDEC-standard footprint.

Pinout & Package

6-pin ceramic CD package: 5 mm × 7 mm × 1.55 mm body, lead-free (RoHS 6), bottom-side solderable terminals.

Pin/Terminal	Circuit Role	Design Meaning
1 - OE	LVCMOS/LVTTL input	Asynchronous output enable; internal 50 kΩ pullup ensures default-enabled operation; drives Q/nQ into high-Z when low.
2 - DNU	No-connect	Factory test pin; must be left unconnected in PCB layout per datasheet directive.
3 - VEE	Negative supply	Ground reference for LVPECL outputs; requires low-inductance connection to system ground plane.
4 - Q	LVPECL output	True-phase differential clock output; requires 50 Ω termination to VCC – 2 V (≈0.5 V at 2.5 V supply).
5 - nQ	LVPECL output	Inverted-phase differential clock output; matched trace length to Q essential for skew control.
6 - VCC	Positive supply	2.5 V ±5% power rail; requires local 0.1 µF + 10 µF decoupling adjacent to pin per layout guidelines.

Key Features

Feature	Design Value
Integer PLL feedback mode	Optimized for lowest phase noise at 156.25 MHz - used in all 1xxx order codes including 1102.
Factory-programmed frequency	No field programming required; eliminates BOM complexity and calibration overhead in production.
2.5 V LVPECL interface	Eliminates need for level shifters when interfacing with 2.5 V FPGA transceivers or SerDes PHYs.
Industrial temperature range	Validated operation from -40°C to +85°C ambient - supports deployment in uncontrolled telecom cabinets.
Low-jitter RMS specification	0.242 ps (12 kHz–20 MHz) - exceeds SONET OC-192 GR-1244-CORE mask by >3× margin.

Applications

10G Ethernet PHY Clocking	CPRI Fronthaul Timing
Use Scenario: Synchronizing XAUI or SFI-5 interfaces in line cards requiring deterministic latency and sub-100 fs jitter accumulation. IC Role / Device Role / Timing Role: Primary low-jitter reference clock for multi-gigabit serializer/deserializer blocks. Use Value: Enables 10GBASE-R compliance with <0.3 ps RMS jitter at 156.25 MHz, reducing bit error rate in backplane links.	Use Scenario: Providing common timing reference across remote radio heads (RRH) and baseband units (BBU) in LTE/5G distributed antenna systems. IC Role / Device Role / Timing Role: Stratum-3-equivalent clock source feeding CPRI master clock distribution networks. Use Value: ±20 ppm stability over temperature ensures <100 ns time error over 5 ms interval, meeting CPRI Class A timing accuracy.
FPGA Transceiver Reference	Synthesizer Local Oscillator
Use Scenario: Driving high-speed transceivers (e.g., Xilinx GTY, Intel Stratix 10 H-Tile) in protocol-agnostic test equipment and reconfigurable compute platforms. IC Role / Device Role / Timing Role: Clean, single-ended-compatible differential clock source for GTX/GTH/GTY reference inputs. Use Value: 0.242 ps phase jitter prevents SERDES CDR lock loss and maintains BER <1e-12 under worst-case channel loss.	Use Scenario: Generating local oscillator signals for microwave up/down-conversion stages in software-defined radios and spectrum analyzers. IC Role / Device Role / Timing Role: Low-phase-noise reference for fractional-N synthesizers targeting 1–6 GHz RF bands. Use Value: High 100 MHz crystal reference and integer PLL minimize close-in phase noise, improving EVM in 256-QAM modulated signals.

10G Ethernet PHY Clocking

CPRI Fronthaul Timing

Use Scenario: Synchronizing XAUI or SFI-5 interfaces in line cards requiring deterministic latency and sub-100 fs jitter accumulation.

IC Role / Device Role / Timing Role: Primary low-jitter reference clock for multi-gigabit serializer/deserializer blocks.

Use Value: Enables 10GBASE-R compliance with <0.3 ps RMS jitter at 156.25 MHz, reducing bit error rate in backplane links.

Use Scenario: Providing common timing reference across remote radio heads (RRH) and baseband units (BBU) in LTE/5G distributed antenna systems.

IC Role / Device Role / Timing Role: Stratum-3-equivalent clock source feeding CPRI master clock distribution networks.

Use Value: ±20 ppm stability over temperature ensures <100 ns time error over 5 ms interval, meeting CPRI Class A timing accuracy.

FPGA Transceiver Reference

Synthesizer Local Oscillator

Use Scenario: Driving high-speed transceivers (e.g., Xilinx GTY, Intel Stratix 10 H-Tile) in protocol-agnostic test equipment and reconfigurable compute platforms.

IC Role / Device Role / Timing Role: Clean, single-ended-compatible differential clock source for GTX/GTH/GTY reference inputs.

Use Value: 0.242 ps phase jitter prevents SERDES CDR lock loss and maintains BER <1e-12 under worst-case channel loss.

Use Scenario: Generating local oscillator signals for microwave up/down-conversion stages in software-defined radios and spectrum analyzers.

IC Role / Device Role / Timing Role: Low-phase-noise reference for fractional-N synthesizers targeting 1–6 GHz RF bands.

Use Value: High 100 MHz crystal reference and integer PLL minimize close-in phase noise, improving EVM in 256-QAM modulated signals.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si510-156M250	LVDS output, 3.3 V supply, ±20 ppm stability, 0.35 ps phase jitter (12 kHz–20 MHz)	Requires LVDS receiver interface and 3.3 V rail; higher jitter limits max data rate in 25G+ links	Select if system uses LVDS signaling and 3.3 V supply is preferred over 2.5 V.
AK210-156.25	LVPECL output, 2.5 V supply, ±25 ppm stability, 0.28 ps phase jitter (12 kHz–20 MHz), same 6-pin CD package	Slightly relaxed stability and jitter specs; not qualified for extended industrial temperature range	Consider for cost-sensitive commercial-temp designs where ±25 ppm and 0.28 ps meet system jitter budget.

Compared with Si510-156M250 and AK210-156.25, the 8N3S270KC-1102CDI uniquely combines 2.5 V LVPECL drive, ±20 ppm total stability over full industrial range, and 0.242 ps phase jitter - making it the only option qualified for Stratum-3-compliant 10G/25G Ethernet timing in thermally demanding environments.

Availability

8N3S270KC-1102CDI is available at Aetrix Electronics and suitable for 10G Ethernet PHY clocking, CPRI fronthaul synchronization, and FPGA transceiver reference applications requiring stable component supply, long-term lifecycle assurance, and guaranteed RoHS 6 compliance.

Supply support for 8N3S270KC-1102CDI 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, formed through the acquisition of IDT in 2019, is a global semiconductor leader specializing in microcontrollers, analog, power management, and timing solutions.

The 8N3S270KC-1102CDI belongs to Renesas' FemtoClock® NG programmable oscillator family, engineered specifically for high-speed wired and wireless infrastructure where ultra-low jitter, factory-configured precision, and industrial-grade reliability are mandatory.

FAQ

What is the factory-programmed output frequency of the 8N3S270KC-1102CDI?

The 8N3S270KC-1102CDI is factory-programmed to deliver a fixed 156.25 MHz LVPECL output. This frequency corresponds to the "1102" order code in the Renesas FemtoClock NG naming convention, indicating integer PLL mode with 100 MHz crystal reference and optimized phase noise performance. No field reprogramming capability exists - the 8N3S270KC-1102CDI operates exclusively at this frequency.

Does the 8N3S270KC-1102CDI support 3.3 V operation?

No, the 8N3S270KC-1102CDI is specified only for 2.5 V ±5% operation, as indicated by the "K" option code in its part number. Attempting to power it at 3.3 V violates Absolute Maximum Ratings and may cause permanent damage. The 8N3S270EC-1102CDI variant supports 3.3 V; the 8N3S270KC-1102CDI must be used with a dedicated 2.5 V supply rail.

What is the meaning of "CD" in the 8N3S270KC-1102CDI package designation?

The "CD" suffix denotes a lead-free, 6-pin ceramic package measuring 5 mm × 7 mm × 1.55 mm, compliant with RoHS 6 requirements. This standardized outline is shared across Renesas' FemtoClock NG XO/VCXO product line and is distinct from plastic SOIC or metal-can packages. The 8N3S270KC-1102CDI uses this CD package for thermal stability and hermetic reliability in harsh environments.

Can the 8N3S270KC-1102CDI be used as a drop-in replacement for the 8N3S270EC-1102CDI?

No - while both share identical pinout and frequency, the 8N3S270KC-1102CDI (2.5 V) and 8N3S270EC-1102CDI (3.3 V) differ in supply voltage, DC characteristics, and thermal dissipation. Swapping them without adjusting the power rail and termination network risks output swing violation, excessive current draw, or startup failure. The 8N3S270KC-1102CDI requires 2.5 V supply and 50 Ω termination to ~0.5 V, unlike the 3.3 V variant's ~1.3 V termination point.

What is the startup time specification for the 8N3S270KC-1102CDI?

The 8N3S270KC-1102CDI has a maximum device startup time of 20 ms after VCC reaches regulation, as specified in Table 5 of the datasheet. This includes crystal oscillation build-up, PLL lock acquisition, and output stabilization. System designers must ensure reset sequencing allows ≥20 ms delay between power rail stabilization and enabling downstream logic that depends on the 8N3S270KC-1102CDI clock.

8N3S270KC-1102CDI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: FemtoClock® NG

Package/Case:: 6-CLCC

Packaging:: Tray

Product Status:: Not For New Designs

Type:: Clock Oscillator

Count:: -

Frequency:: 25MHz

Voltage - Supply:: 3.135V ~ 3.465V

Current - Supply:: 123 mA

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 6-CLCC (7x5)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

8N3S270KC-1102CDI FAQ

1.How can I place an order for 8N3S270KC-1102CDI through Aetrix?

Please submit a Request for Quotation (RFQ) for 8N3S270KC-1102CDI 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 8N3S270KC-1102CDI reliable?

The price and inventory of 8N3S270KC-1102CDI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8N3S270KC-1102CDI is usually 5 days.

3.What payment methods are accepted for 8N3S270KC-1102CDI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8N3S270KC-1102CDI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 8N3S270KC-1102CDI?

8N3S270KC-1102CDI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 8N3S270KC-1102CDI 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 8N3S270KC-1102CDI?

For technical support, including 8N3S270KC-1102CDI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8N3S270KC-1102CDI requirements.

6.How does Aetrix verify that 8N3S270KC-1102CDI is sourced from the original manufacturer or authorized distributors?

All 8N3S270KC-1102CDI 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 8N3S270KC-1102CDI meets industry standards.

7.What is the process for return or replacement of 8N3S270KC-1102CDI?

All 8N3S270KC-1102CDI units undergo pre-shipment inspection (PSI). If there is an issue with 8N3S270KC-1102CDI, 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 8N3S270KC-1102CDI part is unused and in its original packaging.

Return procedure for 8N3S270KC-1102CDI:

1.Submit a request within 90 days.

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

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