Renesas 8N4Q001LG-0102CDI

Overview

8N4Q001LG-0102CDI 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-0102CDI datasheet, 8N4Q001LG-0102CDI pinout, 8N4Q001LG-0102CDI application, or 8N4Q001LG-0102CDI equivalent, this page provides verified package mapping (10-lead ceramic 5 mm × 7 mm), I²C-programmable PLL register architecture, FSEL0/FSEL1-selectable default frequencies, LVDS output compliance, and validated alternative XO options for frequency-agile timing systems.

Technical Context

The 8N4Q001LG-0102CDI integrates a 100 MHz or 114.285 MHz fundamental-mode crystal oscillator driving a fractional-N PLL with 25-bit feedback divider (7-bit MINT + 18-bit MFRAC), 2-bit pre-divider (P), and 7-bit post-divider (N), enabling sub-Hz frequency resolution (435.9 Hz ÷ N). Its FemtoClock® NG VCO operates at 1950–2600 MHz.

Four factory-programmed configuration registers (P₀/MINT₀/MFRAC₀/N₀ through P₃/MINT₃/MFRAC₃/N₃) are selected via FSEL0/FSEL1 pins; all registers are volatile and reload on power-up. I²C interface (SCLK/SDATA) allows runtime reprogramming of any register set without disrupting operation of currently selected configuration.

Key Specifications

Pinout & Package

10-lead ceramic surface-mount package (CD), 5 mm × 7 mm × 1.55 mm body, RoHS 6-compliant, with internal pullup/pulldown resistors on control inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5338A-B-GM and AK2104A-001, the 8N4Q001LG-0102CDI uniquely balances single-LVDS output simplicity, field-programmable frequency agility, and industrial-grade stability in a compact 10-lead ceramic package - making it optimal for space-constrained, frequency-flexible timing nodes in telecom and wireless infrastructure.

Availability

8N4Q001LG-0102CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, and high-speed data center interconnect applications requiring stable component supply, long-lifecycle support, and guaranteed RoHS 6 compliance.

Supply support for 8N4Q001LG-0102CDI 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 for industrial, automotive, and communications markets.

The 8N4Q001LG-0102CDI belongs to Renesas' FemtoClock® NG programmable oscillator family, engineered specifically for high-frequency, low-jitter timing in carrier-grade wireless and optical infrastructure where programmability, stability, and small-footprint packaging are critical.

FAQ

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

The 8N4Q001LG-0102CDI 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 - all stored in its four volatile PLL configuration registers (P₀–P₃, MINT₀–MINT₃, etc.) and selected via FSEL0/FSEL1 pin states. These defaults are loaded at power-up before any I²C programming occurs.

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

Yes, the 8N4Q001LG-0102CDI supports both integer and fractional PLL feedback modes. Integer mode (default for 1xxx order codes like 0102) uses only the 7-bit MINT portion of the feedback divider and yields lower phase noise (0.253 ps RMS @ 156.25 MHz). Fractional mode engages the full 25-bit M-divider (MINT + MFRAC) for higher frequency resolution but slightly higher jitter; mode selection is controlled by DSM_ENA and ADC_EN register bits.

Can 8N4Q001LG-0102CDI be used with a 2.5 V supply in industrial temperature range?

Yes, the 8N4Q001LG-0102CDI fully supports 2.5 V ±5% supply operation across the full -40°C to +85°C industrial temperature range. Its DC characteristics (IDD = 155 mA typ.), LVCMOS/LVTTL input thresholds, and LVDS output specifications (VOD = 247–454 mV, VOS = 1.0–1.375 V) are all validated under these conditions per Tables 5B and 5D in the datasheet.

What is the maximum output frequency step size achievable with 8N4Q001LG-0102CDI?

The smallest frequency step size for 8N4Q001LG-0102CDI is 435.9 Hz ÷ N, where N is the 7-bit post-divider value (3–126 for primary range, 2 for extended range). At N = 126, resolution is ~3.46 Hz; at N = 2 (975–1300 MHz range), resolution improves to ~218 Hz. This granularity enables exact synthesis of telecom-standard rates including 156.25 MHz, 122.88 MHz, and 100.000 MHz.

Is external termination required for the LVDS outputs of 8N4Q001LG-0102CDI?

Yes, external 100 Ω differential termination is required at the receiver end for proper LVDS signal integrity. The 8N4Q001LG-0102CDI's Q/nQ outputs are current-mode LVDS drivers; per datasheet Figure 1A, a 100 Ω parallel resistor across the differential pair at the load is mandatory to establish correct common-mode voltage (1.2 V typ.) and differential swing (247–454 mV). No on-die termination is provided.