Renesas 8N3SV75AC-0029CDI

Overview

8N3SV75AC-0029CDI from Renesas Electronics is a factory-programmed LVPECL voltage-controlled crystal oscillator (VCXO) with fourth-generation FemtoClock® NG PLL synthesis. It delivers 156.25 MHz output at 3.3 V supply, ±50 ppm total stability over -40°C to +85°C, 0.5 ps RMS phase jitter (12 kHz–20 MHz), and supports VCXO pull range configuration. Used in telecom line cards and 10G/25G Ethernet PHY clocking.

For engineers reviewing the 8N3SV75AC-0029CDI datasheet, 8N3SV75AC-0029CDI pinout, 8N3SV75AC-0029CDI application, or 8N3SV75AC-0029CDI equivalent, key selection criteria include LVPECL output compliance, factory-set 156.25 MHz frequency with ±50 ppm stability, 0.5 ps phase jitter performance, OE-controlled high-impedance state, and ceramic 5 mm × 7 mm package compatibility with high-density RF layouts.

Technical Context

The 8N3SV75AC-0029CDI integrates a 114.285 MHz fundamental-mode crystal with a fractional-N PLL using a 1950–2600 MHz VCO, pre-divider (P), feedback divider (MINT/MFRAC), and post-divider (N). Its architecture enables precise frequency synthesis across two bands: 15.476–866.67 MHz and 975–1300 MHz.

It implements delta-sigma modulation for noise shaping, leverages a high-reference-frequency oscillator to minimize multiplication-induced phase noise, and stores factory-configured parameters-including frequency, absolute pull range (APR), and control voltage polarity-in on-chip ROM. The device operates with LVCMOS/LVTTL-compatible OE input and differential LVPECL Q/nQ outputs terminated to VCC – 2 V.

Key Specifications

Pinout & Package

6-lead ceramic VFQFN package, 5 mm × 7 mm × 1.55 mm, RoHS-compliant (6/6), with exposed thermal pad (not electrically connected). Pin 1 marked by index notch; top-side silkscreen includes "IDT8N3SV75" and date code.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si510-PROG and AK21E-156.25MHZ, the 8N3SV75AC-0029CDI uniquely combines factory-programmed LVPECL output, ±50 ppm total stability, analog VC tuning, and sub-0.6 ps jitter-making it optimal for telecom infrastructure requiring both precision and tunability in a single component.

Availability

8N3SV75AC-0029CDI is available at Aetrix Electronics and suitable for 10G/25G Ethernet line cards, wireless baseband units, and optical transport network terminals requiring stable component supply with guaranteed long-term availability.

Supply support for 8N3SV75AC-0029CDI 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for automotive, industrial, and communications markets.

The IDT8N3SV75 product line-acquired from Integrated Device Technology-delivers high-performance, frequency-programmable VCXOs targeting carrier-grade telecom and datacom infrastructure with stringent jitter and stability requirements.

FAQ

What output frequency is factory-programmed in the 8N3SV75AC-0029CDI?

The 8N3SV75AC-0029CDI is factory-programmed to 156.25 MHz, a standard frequency used in Ethernet (10GBASE-R, 25GBASE-R), OTN (OTU2), and CPRI applications. This value is permanently stored in on-chip ROM and cannot be altered in the field. The device achieves this output using a 114.285 MHz crystal reference and fractional-N PLL synthesis with MINT/MFRAC dividers.

Does the 8N3SV75AC-0029CDI support LVPECL termination on a 2.5 V supply?

No-the 8N3SV75AC-0029CDI is configured for 3.3 V operation (option code 'A'), as indicated by the 'A' in its part number. While the underlying IDT8N3SV75 platform supports 2.5 V, this specific variant uses 3.3 V ±5% supply and requires LVPECL termination to VCC – 2 V (i.e., 1.3 V). Using 2.5 V would violate the specified operating conditions and degrade VOH/VOL margins.

What is the absolute pull range (APR) of the 8N3SV75AC-0029CDI?

The 8N3SV75AC-0029CDI has an absolute pull range (APR) of ±50 ppm, consistent with its option code 'E' (±50 ppm stability). This APR is factory-programmed and defines the maximum frequency deviation achievable via the VC input under full control voltage swing (0 V to VCC). The oscillator gain (KV) ranges from 7.57 to 477 ppm/V depending on configuration.

Can the 8N3SV75AC-0029CDI be used without connecting the VEE pin?

No-pin 3 (VEE) must be connected to system ground. Although labeled 'VEE', it serves as the LVPECL output common reference and return path-not a negative supply. Leaving VEE unconnected will prevent proper biasing of the differential output stage, resulting in undefined logic levels, excessive jitter, or complete failure to oscillate. A low-inductance GND connection is mandatory.

How does the OE pin function on the 8N3SV75AC-0029CDI?

The OE (Output Enable) pin on the 8N3SV75AC-0029CDI is an LVCMOS/LVTTL-compatible active-high input. When OE = 1 (≥2.0 V for 3.3 V supply), Q and nQ outputs drive valid LVPECL signals. When OE = 0 (≤0.8 V), both outputs enter high-impedance state-enabling clock tree gating without loading downstream circuits. An internal 50 kΩ pullup ensures default enable if left unconnected.