Renesas 8N3Q001FG-1114CDI

Overview

8N3Q001FG-1114CDI from Integrated Device Technology is a quad-frequency programmable XO (crystal oscillator module) with fourth-generation FemtoClock® NG PLL architecture, delivering LVPECL clock outputs from 15.476 MHz to 866.67 MHz and 975 MHz to 1,300 MHz, RMS phase jitter as low as 0.244 ps (12 kHz–20 MHz), and factory-programmed default frequencies selected via FSEL0/FSEL1 pins for wireless infrastructure timing applications.

For engineers reviewing the 8N3Q001FG-1114CDI datasheet, 8N3Q001FG-1114CDI pinout, 8N3Q001FG-1114CDI application, or 8N3Q001FG-1114CDI equivalent, this page provides verified technical context, I²C-programmable frequency resolution (435.9 Hz ÷ N), dual supply support (2.5 V / 3.3 V), -40°C to +85°C operation, and LVPECL output termination guidance per JEDEC 65.

Technical Context

The 8N3Q001FG-1114CDI integrates a 3rd-overtone crystal (100 MHz or 114.285 MHz) 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 high-resolution synthesis across two disjoint bands. Its four volatile I²C configuration registers (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) store factory-default frequencies and support runtime reprogramming.

Operation supports both integer and fractional PLL feedback modes: integer mode (default for dddd=1xxx order codes) delivers lower phase noise (e.g., 0.244 ps RMS at 156.25 MHz, 12 kHz–20 MHz), while fractional mode enables broader frequency coverage with delta-sigma noise shaping. Output enable (OE) is asynchronous and LVCMOS/LVTTL-compatible, and all control inputs feature internal pullup/pulldown resistors (50 kΩ typical).

Key Specifications

Pinout & Package

10-lead ceramic package (5 mm × 7 mm × 1.55 mm, RoHS 6-compliant CD variant), surface-mount, with exposed thermal 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 8N3SV78EC-0012CDI, the 8N3Q001FG-1114CDI uniquely balances ultra-low jitter (0.244 ps), quad-frequency hardware selectability, and full volatile I²C programmability in a dedicated single-output XO form factor-making it optimal for high-performance, frequency-agile infrastructure timing where output count and integration are secondary to jitter and configurability.

Availability

8N3Q001FG-1114CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport network equipment, and high-speed data converter timing requiring stable component supply, long-term lifecycle support, and guaranteed RoHS 6 compliance.

Supply support for 8N3Q001FG-1114CDI 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions for communications, computing, and industrial markets.

The IDT8N3Q001 product line delivers programmable XOs using FemtoClock® NG PLL technology, designed specifically for high-frequency, low-jitter timing in wireless base stations, optical networking, and test instrumentation where frequency agility and phase noise performance are critical.

FAQ

What is the factory-default frequency configuration for 8N3Q001FG-1114CDI?

The 8N3Q001FG-1114CDI is factory-programmed with four default frequencies corresponding to order code "1114", indicating a 100 MHz crystal reference and integer PLL feedback mode. Default frequencies include 100 MHz, 122.88 MHz, 125 MHz, and 156.25 MHz - each mapped to FSEL[1:0] states 00, 01, 10, and 11 respectively. These values are stored in volatile I²C registers and reload at power-up unless overwritten via I²C.

Does 8N3Q001FG-1114CDI support both 2.5 V and 3.3 V supply voltages simultaneously?

No - the 8N3Q001FG-1114CDI operates exclusively in either 2.5 V ±5% or 3.3 V ±5% mode, selected at manufacturing via option code 'F' (2.5 V) or 'A'/'E'/'K' (3.3 V). The 8N3Q001FG-1114CDI uses a single VCC pin and does not support dual-supply operation; mixing voltages will damage the device or cause undefined behavior.

How is RMS phase jitter measured for 8N3Q001FG-1114CDI, and what integration bandwidth applies?

RMS phase jitter for the 8N3Q001FG-1114CDI is measured per JEDEC Standard 65 using a spectrum analyzer and phase noise plot integration. For the 156.25 MHz output under integer PLL mode, the specified 0.244 ps value uses a 12 kHz to 20 MHz offset integration bandwidth. An alternate 0.265 ps value is provided for 1 kHz to 40 MHz integration, reflecting broader noise contribution - both values are validated at 25°C with 3.3 V supply and proper LVPECL termination.

Can the 8N3Q001FG-1114CDI be reprogrammed in-system after soldering?

Yes - the 8N3Q001FG-1114CDI supports full in-system I²C programming of all PLL configuration registers (P, MINT, MFRAC, N) via SDATA and SCLK pins. Reprogramming can occur at any time after power-up; however, register contents are volatile and reset to factory defaults on power cycle. No special voltage or sequence is required beyond standard 100 kHz/400 kHz I²C signaling with appropriate pullups.

What is the purpose of the DNU pin (Pin 1) on the 8N3Q001FG-1114CDI?

Pin 1 (DNU) on the 8N3Q001FG-1114CDI is designated "Do Not Use" - it has no internal connection and serves only as a mechanical placeholder in the 10-lead ceramic package. It must remain unconnected (floating) or be tied to ground for mechanical stability; routing signals or applying voltage to this pin may compromise reliability or violate package stress limits.