Renesas 8N4Q001LG-0102CDI8

Overview

8N4Q001LG-0102CDI8 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 8N4Q001LG-0102CDI8 datasheet, 8N4Q001LG-0102CDI8 pinout, 8N4Q001LG-0102CDI8 application, or 8N4Q001LG-0102CDI8 equivalent, this page delivers verified package mapping (10-lead ceramic 5 mm × 7 mm), I²C-programmable PLL register architecture (P/MINT/MFRAC/N), factory-default frequency selection via FSEL0/FSEL1, LVDS output compliance, and real-world jitter performance under integer vs. fractional PLL feedback modes.

Technical Context

The 8N4Q001LG-0102CDI8 integrates a 100 MHz or 114.285 MHz fundamental-mode crystal oscillator driving a high-frequency VCO (1950–2600 MHz) with configurable pre-divider (P), fractional feedback divider (MINT + MFRAC), and post-divider (N). Its four independent PLL configuration registers (P₀–P₃, MINT₀–MINT₃, etc.) are selected by FSEL0/FSEL1 and reprogrammable over I²C.

It supports both integer and fractional PLL feedback modes: integer mode yields lower phase noise (0.253 ps @ 156.25 MHz, 12 kHz–20 MHz) but narrower frequency coverage; fractional mode enables ultra-fine resolution (435.9 Hz ÷ N) across full 15.476–866.67 MHz and 975–1300 MHz bands. Output is single LVDS differential pair (Q/nQ), with OE-controlled tri-state capability.

Key Specifications

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5338A-B-GM and 8A34001C-001NLGI, the 8N4Q001LG-0102CDI8 offers superior phase noise (0.253 ps) in a smaller footprint and lower power, but lacks multi-output fanout or JESD204B-specific features - making it optimal for space-constrained, single-clock, high-stability applications where embedded crystal reliability is critical.

Availability

8N4Q001LG-0102CDI8 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-compliant sourcing.

Supply support for 8N4Q001LG-0102CDI8 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, memory interface, and analog mixed-signal solutions for communications, computing, and industrial markets.

The 8N4Q001LG-0102CDI8 belongs to Renesas' FemtoClock® NG programmable XO product line, engineered for high-frequency, low-jitter clock generation in carrier-grade infrastructure where embedded crystal reliability and field-programmable flexibility are essential.

FAQ

What is the factory-default frequency configuration for 8N4Q001LG-0102CDI8?

The 8N4Q001LG-0102CDI8 is factory-programmed with four default frequencies corresponding to order code "0102", which maps to 100 MHz, 122.88 MHz, 125 MHz, and 156.25 MHz - stored in its P₀–P₃, MINT₀–MINT₃, and N₀–N₃ registers and selected via FSEL0/FSEL1 states at power-up. These values are fixed unless rewritten via I²C.

Does 8N4Q001LG-0102CDI8 support both integer and fractional PLL modes?

Yes, the 8N4Q001LG-0102CDI8 supports both integer and fractional PLL feedback modes. Integer mode (default for 1xxx-order codes like 0102) delivers lower phase noise (0.253 ps @ 156.25 MHz); fractional mode (for 0xxx/2xxx codes) enables finer frequency resolution (435.9 Hz ÷ N) across the full 15.476–866.67 MHz and 975–1300 MHz bands.

What is the maximum allowable load capacitance for the LVDS outputs of 8N4Q001LG-0102CDI8?

The 8N4Q001LG-0102CDI8 LVDS outputs (Q/nQ) are specified for 100 Ω differential termination - meaning the net load seen by the driver must be 100 Ω across the differential pair. This is typically achieved with a single 100 Ω resistor placed at the receiver end; no additional capacitive loading beyond PCB trace parasitics (< 2 pF) is recommended to maintain signal integrity and jitter performance.

Can the 8N4Q001LG-0102CDI8 be reprogrammed in-system after soldering?

Yes, the 8N4Q001LG-0102CDI8 supports full in-system reprogramming via its I²C interface (SDATA/SCLK pins). All four PLL configuration registers (P/MINT/MFRAC/N) can be updated dynamically during operation, allowing field-adjustable clock frequencies without hardware modification or device replacement - provided OE remains asserted and VDD is stable.

What is the startup time and frequency settling behavior of 8N4Q001LG-0102CDI8?

The 8N4Q001LG-0102CDI8 has a typical oscillator start-up time (tSTARTUP) of 20 ms from VDD ramp completion. When changing frequencies via FSEL0/FSEL1, output settling occurs within 470 µs (tSET); when reprogramming via I²C, frequency lock is achieved within one VCO cycle (~500 ps at 2 GHz VCO), though system-level stabilization depends on downstream PLLs and loop bandwidths.