Renesas 8N3Q001EG-101LCDI8

Overview

8N3Q001EG-101LCDI8 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 over –40°C to +85°C - used in wireless infrastructure baseband timing and telecom line-card clock synthesis.

For engineers reviewing the 8N3Q001EG-101LCDI8 datasheet, 8N3Q001EG-101LCDI8 pinout, 8N3Q001EG-101LCDI8 application, or 8N3Q001EG-101LCDI8 equivalent, this page provides verified package mapping (10-lead ceramic 5 mm × 7 mm), confirmed I²C register architecture, validated FSEL0/FSEL1 default-frequency selection logic, and real-world jitter performance under integer PLL feedback mode.

Technical Context

The 8N3Q001EG-101LCDI8 implements a fourth-generation FemtoClock® NG PLL with a 1950–2600 MHz VCO, fractional-N feedback divider (7-bit MINT + 18-bit MFRAC), 2-bit pre-divider (P), and 7-bit post-divider (N), enabling frequency resolution of 435.9 Hz ÷ N. It uses an internal 100 MHz fundamental crystal (order code "1xxx") and defaults to integer PLL feedback for optimized phase noise.

Four factory-programmed configurations (P₀/MINT₀/MFRAC₀/N₀ through P₃/MINT₃/MFRAC₃/N₃) are stored in volatile I²C registers and selected via FSEL0/FSEL1 pins; all registers are reprogrammable post-power-up via I²C, but reload on reset. The device supports 2.5 V or 3.3 V supply, LVCMOS/LVTTL control inputs, and LVPECL differential outputs terminated to 50 Ω.

Key Specifications

Pinout & Package

10-lead ceramic package (CD), 5 mm × 7 mm × 1.55 mm body, RoHS 6-compliant, with exposed pad not electrically connected.

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 8N3Q001EG-101LCDI8 uniquely combines integrated crystal, quad-hardware-selectable frequencies, and sub-0.25 ps jitter in a single LVPECL output - simplifying BOM and layout where one precision clock suffices.

Availability

8N3Q001EG-101LCDI8 is available at Aetrix Electronics and suitable for wireless infrastructure, telecom line cards, and data center optical interconnects requiring stable component supply, long-lifecycle availability, and guaranteed industrial temperature performance.

Supply support for 8N3Q001EG-101LCDI8 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 8N3Q001EG-101LCDI8 belongs to IDT's FemtoClock® NG programmable XO family, engineered specifically for wireless infrastructure and telecom equipment demanding ultra-low jitter, hardware-selectable frequencies, and industrial reliability.

FAQ

What is the default output frequency configuration of the 8N3Q001EG-101LCDI8?

The 8N3Q001EG-101LCDI8 is factory-programmed with four default frequencies determined by its order code "101L"; per IDT documentation, "1xxx" codes use a 100 MHz crystal and integer PLL feedback. Specific default values depend on the programmed FSEL register set (P₀/MINT₀/MFRAC₀/N₀ through P₃), which are accessible via I²C readback. The 8N3Q001EG-101LCDI8 does not ship with user-defined frequencies - those require post-power-up I²C programming.

Does the 8N3Q001EG-101LCDI8 support both 2.5 V and 3.3 V supply voltages simultaneously?

No, the 8N3Q001EG-101LCDI8 operates exclusively at either 2.5 V ±5% or 3.3 V ±5%, selected at manufacturing via option code (E = 3.3 V/±50 ppm, F = 2.5 V/±50 ppm). The 8N3Q001EG-101LCDI8 cannot dynamically switch between supplies; VCC must be stable at the rated voltage throughout operation. Both modes support identical frequency range, jitter, and I²C functionality.

How is phase jitter measured for the 8N3Q001EG-101LCDI8, and what integration bandwidth applies to the 0.244 ps specification?

The 0.244 ps RMS phase jitter value for the 8N3Q001EG-101LCDI8 is measured at 156.25 MHz output with integer PLL feedback and 100 MHz crystal reference, integrated from 12 kHz to 20 MHz offset. This matches JEDEC Standard 65 methodology and reflects random jitter contribution relevant to high-speed serial link BER performance. The 8N3Q001EG-101LCDI8 datasheet also specifies 0.265 ps under 1 kHz–40 MHz integration for broader noise assessment.

Can the FSEL0 and FSEL1 pins be left unconnected, or do they require external biasing?

FSEL0 and FSEL1 have internal pulldown resistors (50 kΩ typical), so they default to logic '0' when floating - selecting Frequency 0. However, IDT recommends tying them explicitly to GND or VCC via 1 kΩ resistors for ESD robustness and noise immunity in noisy industrial environments. Leaving them floating is functional but not advised for production designs. The 8N3Q001EG-101LCDI8 datasheet confirms this in the "Recommendations for Unused Input Pins" section.

What is the maximum I²C clock frequency supported by the 8N3Q001EG-101LCDI8?

The 8N3Q001EG-101LCDI8 supports standard-mode I²C up to 100 kHz and fast-mode up to 400 kHz, as confirmed in the AC Characteristics table and Functional Description. SCLK must meet LVCMOS/LVTTL timing: minimum pulse width ≥ 0.6 µs (fast-mode), with rise/fall times ≤ 300 ns. The 8N3Q001EG-101LCDI8 does not support high-speed I²C (3.4 MHz); exceeding 400 kHz may cause register write failures or communication timeouts.