Renesas 8N4Q001EG-1014CDI8

Overview

8N4Q001EG-1014CDI8 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 RMS phase jitter as low as 0.253 ps at 156.25 MHz (12 kHz–20 MHz), operating from 2.5 V or 3.3 V supply across –40°C to +85°C in wireless infrastructure timing applications.

For engineers reviewing the 8N4Q001EG-1014CDI8 datasheet, 8N4Q001EG-1014CDI8 pinout, 8N4Q001EG-1014CDI8 application, or 8N4Q001EG-1014CDI8 equivalent, this page provides verified technical context, I²C-programmable PLL register mapping, differential LVDS output behavior, FSEL-controlled default frequency selection, and validated alternatives for telecom clock synthesis.

Technical Context

The 8N4Q001EG-1014CDI8 integrates a 1950–2600 MHz VCO with fractional-N PLL architecture, where output frequency is determined by pre-divider (P), integer/fractional feedback divider (MINT/MFRAC), and post-divider (N), supporting frequency resolution of 435.9 Hz ÷ N. It uses an internal 100 MHz crystal reference (order code "1xxx") and defaults to integer PLL feedback mode for optimized phase noise.

Four independent configuration registers (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) are selected via FSEL0/FSEL1 pins at power-up and reprogrammable over I²C. The device features asynchronous OE control, LVCMOS/LVTTL-compatible inputs, and differential LVDS outputs with 247–454 mV differential voltage and 1.0–1.375 V common-mode offset.

Key Specifications

Pinout & Package

10-lead ceramic surface-mount package (CD), 5 mm × 7 mm × 1.55 mm body, 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 8N4Q001EG-1014CDI8 uniquely combines single-LVDS output, 975–1300 MHz capability, I²C-reprogrammability, and industrial temperature rating-making it optimal for space-constrained, high-frequency wireless timing where output count and protocol specificity are secondary to precision and flexibility.

Availability

8N4Q001EG-1014CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport network, and high-speed data center switch applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant ceramic packaging.

Supply support for 8N4Q001EG-1014CDI8 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 through the merger of Renesas Technology and NEC Electronics, specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and communications markets.

The 8N4Q001EG-1014CDI8 belongs to Renesas' FemtoClock® NG programmable oscillator product line, engineered specifically for high-frequency, low-jitter timing in 4G/5G infrastructure, OTN, and high-speed serial interface applications.

FAQ

What is the default crystal frequency used in the 8N4Q001EG-1014CDI8?

The 8N4Q001EG-1014CDI8 uses an internal 100.000 MHz fundamental-mode crystal (order code "1xxx"), which serves as the reference for its fractional-N PLL. This reference enables integer PLL feedback configuration by default, yielding optimized phase noise performance at frequencies such as 156.25 MHz with 0.253 ps RMS jitter (12 kHz–20 MHz integration).

Does the 8N4Q001EG-1014CDI8 support both 2.5 V and 3.3 V supply voltages simultaneously?

No - the 8N4Q001EG-1014CDI8 operates from either 2.5 V ±5% or 3.3 V ±5%, but not both simultaneously. The supply voltage is fixed per unit based on order code (E = 3.3 V, F = 2.5 V). Both supply modes are fully supported in the same CD package, with identical DC/AC specifications except for power supply current (155 mA typical at 2.5 V, 160 mA at 3.3 V).

How does the FSEL0/FSEL1 pin combination determine the active frequency configuration in the 8N4Q001EG-1014CDI8?

FSEL0 and FSEL1 form a 2-bit binary address selecting one of four preloaded PLL register sets (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) at power-up. For example, FSEL1=0/FSEL0=1 selects Frequency 1 (P₁, MINT₁, MFRAC₁, N₁). These pins are pulldown-biased and require explicit logic high to override default states.

Can the 8N4Q001EG-1014CDI8 generate frequencies below 15.476 MHz or above 1300 MHz?

No - the 8N4Q001EG-1014CDI8 is specified only for 15.476–866.67 MHz (N = 3–126) and 975–1300 MHz (N = 2). Frequencies outside these ranges are not supported by the PLL architecture or validated in characterization. Attempting out-of-range synthesis may result in lock failure, excessive jitter, or undefined output behavior.

What is the function of the DNU pin (Pin 1) on the 8N4Q001EG-1014CDI8?

Pin 1 is marked DNU (Do Not Use) and is internally unconnected. It must remain unpopulated or tied to GND in PCB layout to prevent floating node coupling; no electrical functionality is assigned to this terminal, and connecting it to any active signal violates the device's operational specification.