Renesas 8N4SV76LC-0181CDI

Overview

8N4SV76LC-0181CDI from Integrated Device Technology is an LVDS frequency-programmable VCXO using fourth-generation FemtoClock® NG technology, delivering 15.476–866.67 MHz or 975–1300 MHz output with 218 Hz frequency resolution, ±4.5 to ±754.5 ppm absolute pull-range, and 0.53 ps RMS phase jitter at 156.25 MHz (12 kHz–20 MHz). It serves as a high-stability clock source in wireless infrastructure baseband units.

For engineers reviewing the 8N4SV76LC-0181CDI datasheet, 8N4SV76LC-0181CDI pinout, 8N4SV76LC-0181CDI application, or 8N4SV76LC-0181CDI equivalent, key selection considerations include factory-programmed VCXO pull-range and control voltage polarity, LVDS differential output compliance, -40°C to 85°C industrial temperature operation, and RoHS-compliant 6-lead ceramic 5 mm × 7 mm × 1.55 mm package.

Technical Context

The 8N4SV76LC-0181CDI integrates a 114.285 MHz third-overtone crystal oscillator, a 1950–2600 MHz VCO, and a fractional-N PLL with 7-bit integer (MINT) and 18-bit fractional (MFRAC) feedback dividers. Its architecture enables precise frequency synthesis across two disjoint bands via programmable pre-divider (P) and post-divider (N).

Control is implemented through a dedicated VC input for analog tuning and an LVCMOS/LVTTL-compatible nOE pin enabling high-impedance output states. The device uses internal ROM to store factory-configured parameters including frequency, APR, and VC polarity-no runtime reprogramming capability is supported.

Key Specifications

Pinout & Package

6-lead ceramic VFQFN package (5 mm × 7 mm × 1.55 mm), lead-free (RoHS 6), top-view pinout with 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 Si514-A-D-GM and AK2-156.250MHZ-E, the 8N4SV76LC-0181CDI uniquely combines factory-programmed LVDS VCXO functionality, dual-band frequency coverage, and industrial temperature qualification-making it the only option among the three capable of serving as a tunable, low-jitter reference in carrier-class wireless infrastructure.

Availability

8N4SV76LC-0181CDI is available at Aetrix Electronics and suitable for wireless infrastructure, optical transport networking, and carrier-grade Ethernet switching requiring stable component supply, long-lifecycle availability, and traceable RoHS-compliant sourcing.

Supply support for 8N4SV76LC-0181CDI 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 IDT8N4SV76 family delivers frequency-programmable VCXOs optimized for wireless infrastructure and telecom equipment where low phase noise, wide pull-range, and industrial temperature reliability are critical design requirements.

FAQ

What is the factory-programmed frequency and pull-range for 8N4SV76LC-0181CDI?

The 8N4SV76LC-0181CDI is factory-programmed to a specific default frequency and absolute pull-range (APR) defined by its order code suffix "0181". Per IDT's ordering documentation, "0181" corresponds to a default output frequency of 156.25 MHz and an APR of ±100 ppm. This configuration is permanently stored in on-chip ROM and cannot be altered in the field. The 8N4SV76LC-0181CDI retains this setting across all operating conditions.

Does 8N4SV76LC-0181CDI support both 2.5 V and 3.3 V supply voltages?

Yes, the 8N4SV76LC-0181CDI operates from either a 2.5 V ±5% or 3.3 V ±5% supply, as specified in Tables 4A and 4B of the datasheet. Power supply current is 135–170 mA at 2.5 V and 140–175 mA at 3.3 V. The device automatically adapts LVDS output levels (VOD, VOS) to the selected VDD, ensuring compliance with ANSI TIA/EIA-644-A across both rails. No external level-shifting circuitry is required.

What is the meaning of the "C" and "D" in the package code "CDI" of 8N4SV76LC-0181CDI?

In the part number 8N4SV76LC-0181CDI, "CD" denotes the package type: lead-free, 6-lead ceramic VFQFN measuring 5 mm × 7 mm × 1.55 mm. The final "I" indicates industrial temperature grade (-40°C to +85°C ambient). The "C" does not refer to revision; per Table 9, revision coding is separate and not embedded in the CDI suffix. This package is mechanically and thermally qualified for reflow soldering per JEDEC J-STD-020.

Can the 8N4SV76LC-0181CDI be used as a drop-in replacement for fixed-frequency XO devices?

No-the 8N4SV76LC-0181CDI is a VCXO requiring an external control voltage (VC) input to set frequency within its programmed APR. Unlike fixed XOs, it lacks internal oscillation autonomy without VC biasing. Using it as a fixed-frequency source demands stable VC = VDD/2 (±1%) and careful filtering to avoid injecting noise that degrades phase jitter. Its nOE pin provides output disable, but no internal oscillator shutdown mode exists.

What is the maximum RMS phase jitter performance of 8N4SV76LC-0181CDI across its full frequency range?

The 8N4SV76LC-0181CDI achieves best-in-class RMS phase jitter of 0.46 ps (typical) at output frequencies between 500 MHz and 1300 MHz (integration range 12 kHz–20 MHz), 0.48 ps (100–500 MHz), and 0.76 ps (15–100 MHz). At its common default frequency of 156.25 MHz, jitter is 0.53 ps (typical). These values assume optimal PCB layout, clean power supplies, and proper LVDS termination-exceeding requirements for OTU4, 100G KR4, and CPRI Option 3 applications.