Renesas 8N4Q001EG-1014CDI

Overview

8N4Q001EG-1014CDI 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 435.9 Hz ÷ N frequency resolution. It features I²C programmability, dual FSEL control inputs for four factory-default frequencies, and operates across –40°C to +85°C in wireless infrastructure timing applications.

For engineers reviewing the 8N4Q001EG-1014CDI datasheet, 8N4Q001EG-1014CDI pinout, 8N4Q001EG-1014CDI application, or 8N4Q001EG-1014CDI equivalent, this device supports high-precision, reprogrammable clock synthesis with integer/fractional PLL feedback modes, RMS phase jitter as low as 0.253 ps at 156.25 MHz (12 kHz–20 MHz), and RoHS-compliant 5 mm × 7 mm ceramic packaging.

Technical Context

The 8N4Q001EG-1014CDI 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). Its VCO operates at 1950–2600 MHz, enabling wideband output synthesis while maintaining low phase noise via delta-sigma modulation.

Four independent I²C-accessible configuration registers (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) are selected by FSEL0/FSEL1 pins at power-up; all registers are volatile and reload factory defaults on power cycle. The device supports both integer and fractional PLL feedback modes-integer mode yields lower jitter (e.g., 0.253 ps RMS at 156.25 MHz), while fractional mode enables finer frequency granularity across full range.

Key Specifications

Pinout & Package

8N4Q001EG-1014CDI is housed in a lead-free 10-lead ceramic package measuring 5 mm × 7 mm × 1.55 mm (CD package), optimized for thermal stability and low EMI in high-density timing modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5338A-B-GM and AK210-01-156.2500T, the 8N4Q001EG-1014CDI uniquely combines hardware-selectable quad defaults with full I²C reprogrammability in a single LVDS output, making it optimal for wireless infrastructure where boot-time frequency agility and field-upgradable timing are mandatory.

Availability

8N4Q001EG-1014CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networks, high-speed data center interconnects, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 8N4Q001EG-1014CDI 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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, formed through the integration of IDT's timing and interface expertise.

The 8N4Q001EG-1014CDI belongs to Renesas' FemtoClock® NG programmable oscillator family, engineered specifically for high-frequency, low-jitter timing in wireless base stations, telecom infrastructure, and high-speed serial protocols.

FAQ

What is the factory-default frequency configuration for 8N4Q001EG-1014CDI?

The "1014" order code indicates the 8N4Q001EG-1014CDI is factory-programmed with four default frequencies corresponding to dddd = 1014 - which maps to the 100 MHz crystal variant (integer PLL mode) and specific P/M/N register settings defined in the FemtoClock NG Ordering Product Information document. These defaults are loaded at power-up based on FSEL0/FSEL1 states and can be overwritten via I²C.

Does 8N4Q001EG-1014CDI support both integer and fractional PLL modes?

Yes, the 8N4Q001EG-1014CDI supports both modes. Its "1014" order code specifies a 100 MHz crystal and integer PLL feedback (DSM_ENA = 0, ADC_EN = 0), yielding lower phase jitter (e.g., 0.253 ps at 156.25 MHz). Fractional mode is accessible via I²C register writes and enables finer frequency resolution across the full 15.476 MHz–1.3 GHz range.

What is the maximum allowable load capacitance for the LVDS outputs of 8N4Q001EG-1014CDI?

The 8N4Q001EG-1014CDI LVDS outputs (Q/nQ) require a 100 Ω differential termination resistor placed as close as possible to the receiver. The device itself does not specify a maximum load capacitance; instead, layout adherence to controlled-impedance differential routing (Z₀ = 100 Ω) and minimized stub length ensures signal integrity. Excessive trace capacitance degrades edge rate and increases jitter beyond the specified 100–425 ps rise/fall time.

Can the 8N4Q001EG-1014CDI operate from a 2.5 V supply?

Yes, the 8N4Q001EG-1014CDI fully supports 2.5 V ±5% operation, as confirmed in Table 5B of the datasheet. It draws 155 mA typical supply current at 2.5 V and maintains identical frequency range, jitter performance, and I²C functionality. The device automatically adapts internal level-shifters for LVCMOS/LVTTL control inputs (FSEL0, FSEL1, OE, SCLK, SDATA) across both 2.5 V and 3.3 V supply modes.

How is the output enable (OE) function implemented on 8N4Q001EG-1014CDI?

The OE pin (Pin 2) is an asynchronous LVCMOS/LVTTL input with internal pullup. When driven low, it places the Q/nQ LVDS outputs in high-impedance state immediately - no clock cycles required. When high (default), outputs are active. This enables dynamic clock gating in power-managed systems without affecting internal PLL lock state or register contents.