Renesas 8N4Q001LG-1037CDI

Overview

8N4Q001LG-1037CDI 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 0.253 ps RMS phase jitter at 156.25 MHz (12 kHz–20 MHz), 2.5 V/3.3 V supply support, and -40°C to +85°C operation - deployed in wireless infrastructure baseband timing and telecom line cards.

For engineers reviewing the 8N4Q001LG-1037CDI datasheet, 8N4Q001LG-1037CDI pinout, 8N4Q001LG-1037CDI application, or 8N4Q001LG-1037CDI equivalent, this page delivers verified package mapping (10-lead ceramic 5 mm × 7 mm), I²C-programmable PLL register architecture (P/MINT/MFRAC/N), FSEL0/FSEL1 dual-control frequency selection, LVDS output compliance, and factory-default frequency configuration for rapid system integration.

Technical Context

The 8N4Q001LG-1037CDI integrates a 100 MHz or 114.285 MHz 3rd-overtone crystal oscillator driving a fractional-N PLL with 7-bit integer (MINT) and 18-bit fractional (MFRAC) feedback dividers, enabling sub-Hz frequency resolution (435.9 Hz ÷ N). Its VCO operates at 1950–2600 MHz, followed by a 7-bit post-divider (N = 2–126) and 2-bit pre-divider (P).

Four independent PLL configuration registers (P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, N₀–N₃) are mapped to FSEL[1:0] inputs for hardware-selectable power-up frequencies; all registers are volatile and reprogrammable via I²C (SCLK/SDATA pins), supporting dynamic frequency switching with 470 µs settling time.

Key Specifications

Pinout & Package

8N4Q001LG-1037CDI is housed in a lead-free 10-lead ceramic surface-mount package (5 mm × 7 mm × 1.55 mm, CD variant), optimized for thermal performance and high-frequency signal integrity in dense RF and baseband layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5338A-B-GM and 8A34002NLGI, the 8N4Q001LG-1037CDI uniquely combines factory-programmed quad-boot frequencies with volatile I²C reprogramming and single-LVDS output - making it optimal for space-constrained, multi-rate telecom modules requiring deterministic startup and runtime flexibility without added complexity.

Availability

8N4Q001LG-1037CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, and telecom packet switching applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant ceramic packaging.

Supply support for 8N4Q001LG-1037CDI 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 (formerly IDT) is a global semiconductor leader specializing in timing, memory interface, and high-performance analog solutions for communications, computing, and industrial markets.

The 8N4Q001LG-1037CDI belongs to the FemtoClock® NG programmable XO family, engineered specifically for high-frequency, low-jitter clock generation in next-generation wireless, optical, and packet infrastructure where precision, programmability, and industrial temperature resilience are critical.

FAQ

What is the factory-default frequency configuration for 8N4Q001LG-1037CDI?

The 8N4Q001LG-1037CDI is factory-programmed with four default frequencies corresponding to order code "1037", which maps to the 100 MHz crystal variant (fXTAL = 100.000 MHz) in integer PLL mode. These frequencies are stored in P₀–P₃, MINT₀–MINT₃, MFRAC₀–MFRAC₃, and N₀–N₃ registers and selected via FSEL[1:0]. The exact values depend on the specific 1037 configuration documented in IDT's FemtoClock NG Ordering Product Information.

Does 8N4Q001LG-1037CDI support both 2.5 V and 3.3 V operation simultaneously?

No - the 8N4Q001LG-1037CDI operates exclusively at either 2.5 V ±5% or 3.3 V ±5%, as defined by its option code (K = 3.3 V ±20 ppm stability). It does not support dual-rail or mixed-voltage supply. VDD must be connected to a single, well-regulated rail matching the specified voltage; mixing supplies will damage the device or cause undefined behavior.

Can the 8N4Q001LG-1037CDI output frequencies below 15.476 MHz or above 1300 MHz?

No - the 8N4Q001LG-1037CDI is strictly limited to two disjoint frequency bands: 15.476–866.67 MHz and 975–1300 MHz. Frequencies outside these ranges are not supported by the PLL architecture or VCO operating window. Attempting to program out-of-range values results in invalid lock or excessive phase noise; the datasheet explicitly prohibits operation beyond these limits.

How does the OE pin function on the 8N4Q001LG-1037CDI?

The OE (Output Enable) pin on the 8N4Q001LG-1037CDI is an asynchronous LVCMOS/LVTTL input with internal pullup. When driven low, it places the Q/nQ LVDS outputs in high-impedance state - useful for power sequencing or hot-swap isolation. When high (default), outputs are active. OE has no effect on internal oscillator or PLL operation; the core remains powered and locked regardless of OE state.

Is the 8N4Q001LG-1037CDI pin-compatible with other IDT8N4Q001 variants?

Yes - all IDT8N4Q001 family members, including 8N4Q001LG-1037CDI, share identical 10-lead CD package pinout, electrical characteristics, and footprint. Differences lie solely in factory-programmed defaults (order code), supply voltage, and stability grade (option code A/B/E/F/K/L); no PCB redesign is needed when substituting within the same package variant.