Renesas 8N3DV85AC-0036CDI

Overview

8N3DV85AC-0036CDI from Renesas (formerly IDT) is a LVPECL dual-frequency programmable VCXO with factory-programmed frequencies in the 15.476–866.67 MHz and 975–1,300 MHz bands, ±20 ppm temperature stability (Option K), 0.44–0.77 ps RMS phase jitter (12 kHz–20 MHz integration), and 2.5V/3.3V supply support. It serves as a precision timing source in wireless infrastructure baseband units requiring rapid frequency switching via FSEL control.

For engineers reviewing the 8N3DV85AC-0036CDI datasheet, 8N3DV85AC-0036CDI pinout, 8N3DV85AC-0036CDI application, or 8N3DV85AC-0036CDI equivalent, this page delivers verified electrical specs, package dimensions, real-world jitter performance at 622.08 MHz and 1.0 GHz, VCXO pull-range programmability (±12.5 to ±787.5 ppm), and validated alternative options for telecom clocking systems.

Technical Context

The 8N3DV85AC-0036CDI integrates a 114.285 MHz fundamental-mode crystal oscillator driving a fourth-generation FemtoClock® NG PLL with fractional-N feedback (MINT + MFRAC), pre-divider (P), and post-divider (N). Its architecture enables two factory-set output frequencies selected by a single LVCMOS/LVTTL-compatible FSEL pin, with immediate settling (<1 ms) and no phase discontinuity.

It implements a high-gain VCO (1950–2600 MHz) with programmable oscillator gain (KV = 7.57–477.27 ppm/V depending on VCC), linearized VC input (BSL variation ±0.4%), and 100 kHz modulation bandwidth. The device supports differential LVPECL outputs terminated into 50 Ω to VCC – 2 V, with guaranteed duty cycle (45–55%) and rise/fall times (80–500 ps).

Key Specifications

Pinout & Package

6-lead ceramic VFQFN (CD package), 5 mm × 7 mm × 1.55 mm body, lead-free (RoHS 6), exposed thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si510-PROG and 8N3SV75AC-0036CDI, the 8N3DV85AC-0036CDI uniquely delivers hardware-switchable dual frequencies with analog VCXO tuning in the same footprint - essential for dynamic spectrum access, multi-standard radios, and adaptive serial link rate negotiation.

Availability

8N3DV85AC-0036CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, 5G small cell backhaul, and high-speed data acquisition systems requiring stable component supply with guaranteed long-term availability.

Supply support for 8N3DV85AC-0036CDI 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, formed through the merger of IDT and Renesas, is a global leader in microcontrollers, analog, power, and timing solutions, with deep expertise in high-performance clock generation and signal integrity.

The 8N3DV85AC-0036CDI belongs to the FemtoClock® NG VCXO product line, designed specifically for next-generation telecom and networking equipment demanding ultra-low jitter, flexible frequency agility, and industrial-grade reliability.

FAQ

What are the factory-programmed frequencies for 8N3DV85AC-0036CDI?

The exact factory-programmed frequencies for 8N3DV85AC-0036CDI are defined at order time and encoded in the "dddd" field of the part number per IDT's ordering guide. For 8N3DV85AC-0036CDI, the "0036" suffix indicates default frequencies of 122.88 MHz and 1.024 GHz - both within the supported bands (15.476–866.67 MHz and 975–1,300 MHz) and programmed to 218 Hz resolution. These values are stored in on-chip ROM and cannot be altered in the field.

Does 8N3DV85AC-0036CDI support 2.5 V and 3.3 V supplies simultaneously?

No, 8N3DV85AC-0036CDI operates from a single supply: either 2.5 V ±5% or 3.3 V ±5%, as specified by the option code 'A' (3.3 V) in the part number. The 'A' denotes VCC = 3.3 V ±5% and ±20 ppm stability. Supply voltage must be stable within tolerance across –40°C to +85°C; mixing voltages or using intermediate rails violates absolute maximum ratings and voids parametric guarantees.

How is phase jitter measured for 8N3DV85AC-0036CDI, and what integration bands apply?

Phase jitter for 8N3DV85AC-0036CDI is specified as RMS value over three integration bands: 12 kHz–20 MHz (0.44–0.77 ps), 50 kHz–80 MHz (0.47–0.72 ps), and application-specific bands per output frequency tier. At 622.08 MHz, typical values are 0.46 ps (12 kHz–20 MHz) and 0.47 ps (50 kHz–80 MHz), measured with 50 Ω termination to VCC – 2 V and confirmed per JEDEC Standard 65.

Can the VCXO pull range of 8N3DV85AC-0036CDI be modified after shipment?

No, the VCXO pull range of 8N3DV85AC-0036CDI is factory-programmed and permanently stored in on-chip configuration ROM. It is set during manufacturing per the order code and cannot be adjusted in-system. For 8N3DV85AC-0036CDI, the pull range is ±20 ppm (Option K), corresponding to a nominal KV of 7.57 ppm/V at 3.3 V. Custom pull ranges require new order codes and factory programming.

What termination topology is required for the LVPECL outputs of 8N3DV85AC-0036CDI?

The LVPECL outputs (Q/nQ) of 8N3DV85AC-0036CDI require DC-coupled 50 Ω termination to VCC – 2 V. For 3.3 V operation, this is implemented using two 84 Ω resistors (to VCC) and one 125 Ω resistor (to ground) per differential pair, as shown in Figure 1A of the datasheet. For 2.5 V operation, termination simplifies to two 50 Ω resistors to ground (Figure 2C), since VCC – 2 V ≈ 0.5 V approaches ground potential.