Renesas 8N3Q001EG-1049CDI8

Overview

8N3Q001EG-1049CDI8 from Integrated Device Technology is a quad-frequency programmable XO (crystal oscillator module) with I²C-based frequency reconfiguration, delivering one LVPECL differential clock output across 15.476 MHz–866.67 MHz and 975 MHz–1.3 GHz ranges, RMS phase jitter as low as 0.244 ps at 156.25 MHz (12 kHz–20 MHz), and operation from -40°C to +85°C ambient. It serves as a high-stability timing source in wireless infrastructure baseband units.

For engineers reviewing the 8N3Q001EG-1049CDI8 datasheet, 8N3Q001EG-1049CDI8 pinout, 8N3Q001EG-1049CDI8 application, or 8N3Q001EG-1049CDI8 equivalent, this page delivers verified technical context, validated pin functions, confirmed frequency programming resolution (435.9 Hz ÷ N), real-world jitter performance under integer PLL mode, and two field-validated alternative XO options for telecom-grade clocking.

Technical Context

The 8N3Q001EG-1049CDI8 implements fourth-generation FemtoClock® NG architecture with a 1950–2600 MHz VCO, fractional-N PLL using 7-bit MINT + 18-bit MFRAC feedback dividers, and 2-bit pre-divider (P) and 7-bit post-divider (N). Its reference crystal operates at either 100.000 MHz (integer PLL default) or 114.285 MHz (fractional PLL default), per order code dddd=1049.

Four factory-programmed P/M/N configurations are stored in volatile I²C registers and selected via FSEL0/FSEL1 pins; all can be overwritten via I²C after power-up. Output enable (OE) provides asynchronous LVCMOS/LVTTL-compatible control of the Q/nQ LVPECL pair, with internal pullup on OE and pulldown on FSEL pins.

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 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-A-GM and 8A34001C-001NLGI, the 8N3Q001EG-1049CDI8 uniquely combines factory-programmed quad defaults, single-LVPECL output simplicity, ceramic-package thermal stability, and sub-0.25 ps jitter-making it optimal for space-constrained, high-reliability telecom timing where fast boot-time frequency availability matters.

Availability

8N3Q001EG-1049CDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, optical networking, and high-speed packet processing applications requiring stable component supply, guaranteed RoHS 6 compliance, and industrial-temperature qualification.

Supply support for 8N3Q001EG-1049CDI8 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, designs high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT8N3Q001 product line delivers programmable XOs optimized for wireless infrastructure and telecom equipment, emphasizing low phase noise, flexible I²C reconfiguration, and robust industrial-temperature operation.

FAQ

What is the factory-programmed default frequency set for 8N3Q001EG-1049CDI8?

The 8N3Q001EG-1049CDI8 is ordered with dddd=1049, indicating a 100.000 MHz crystal reference and integer PLL configuration. Its four factory-default frequencies are 100 MHz, 122.88 MHz, 125 MHz, and 156.25 MHz - stored in P0–P3 registers and selected by FSEL[1:0] at power-up. These values are fixed at manufacturing and cannot be altered without I²C reprogramming.

Does 8N3Q001EG-1049CDI8 support both 2.5 V and 3.3 V supply voltages simultaneously?

No - the 8N3Q001EG-1049CDI8 operates in either 2.5 V ±5% or 3.3 V ±5% mode, selected at design time and fixed per unit. The Option Code 'E' in the part number confirms 3.3 V supply and ±50 ppm stability. Both supply modes deliver identical jitter performance and pin-compatible operation, but the device must be powered from only one rail.

How is RMS phase jitter measured for 8N3Q001EG-1049CDI8, and what integration bandwidth applies?

RMS phase jitter for 8N3Q001EG-1049CDI8 is specified as 0.244 ps typical at 156.25 MHz under integer PLL mode with fXTAL = 100.000 MHz, integrated from 12 kHz to 20 MHz. An alternate value of 0.265 ps applies when integrating from 1 kHz to 40 MHz. These values are measured per JEDEC Standard 65 and reflect random jitter only, excluding deterministic components.

Can the 8N3Q001EG-1049CDI8 be used without connecting the SDATA and SCLK pins?

Yes - SDATA and SCLK are optional I²C interface pins. If frequency reprogramming is not required, they may be left floating (SCLK has internal pullup; SDATA is open-drain with internal pullup). The device will operate using its four factory-default frequencies selected solely by FSEL0/FSEL1, with no impact on startup time or output stability.

What termination is required for the Q/nQ LVPECL outputs of 8N3Q001EG-1049CDI8?

The Q/nQ outputs require 50 Ω differential termination to VCC – 2 V. For 3.3 V operation, this equals 1.3 V; for 2.5 V, it approximates ground. Recommended layouts include either dual 50 Ω resistors to VCC – 2 V (Figure 1A) or Thevenin-style termination using 84 Ω pull-up and 125 Ω pull-down (Figure 1B). Improper termination increases jitter and distorts edge rates beyond spec.