Renesas 5P49V6975A000LTGI

Overview

5P49V6975A000LTGI from Renesas Electronics is a VersaClock® 6E programmable clock generator with integrated 25MHz crystal, supporting up to four differential or single-ended outputs (LVPECL/LVDS/HCSL/LVCMOS), <0.5ps RMS phase jitter, and I²C programmability via dual addresses (0xD0/0xD4). It serves as a system timing hub in PCIe Gen4/Gen5 switch/router designs requiring low-jitter, multi-voltage, spread-spectrum-capable clock synthesis.

For engineers reviewing the 5P49V6975A000LTGI datasheet, 5P49V6975A000LTGI pinout, 5P49V6975A000LTGI application, or 5P49V6975A000LTGI equivalent, key selection criteria include its internal crystal elimination of external tuning, per-output spread spectrum control, 1.8V/2.5V/3.3V mixed I/O voltage support, and industrial temperature operation (-40°C to +85°C).

Technical Context

The 5P49V6975A000LTGI implements a high-performance fractional-N PLL with 2.5–2.9GHz VCO range, enabling precise any-frequency synthesis across its four independently configurable output pairs. Its architecture includes four banks of OTP memory for factory or in-system configuration, two hardware select pins (SEL0/SEL1) for mode selection, and an I²C interface supporting dual addresses to coexist with other devices on the same bus.

Each output pair supports independent spread-spectrum modulation (±0.1% to ±2.5%), programmable skew, and cascaded or individual FOD division. The device accepts differential (CLKIN/CLKINB) or internal crystal reference input, with manual switchover controlled by CLKSEL, and features dedicated VDDOx power rails per output bank to enable mixed-voltage signaling (e.g., LVDS at 1.8V, LVPECL at 3.3V).

Key Specifications

Pinout & Package

Package: 4 × 4 mm, 24-pin LGA (Land Grid Array) with exposed thermal pad (EPAD), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5341-B-GM and ICS8430I-01T, the 5P49V6975A000LTGI uniquely balances integration (internal crystal), programmability (I²C + OTP), and EMI control (per-output SSC) in a compact 4×4mm package-making it optimal for space-constrained, multi-standard systems like PCIe 5.0 switches and carrier Ethernet routers.

Availability

5P49V6975A000LTGI is available at Aetrix Electronics and suitable for PCIe Gen5 switch timing, Fibre Channel SAN controllers, and broadcast video synchronizers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 5P49V6975A000LTGI 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for automotive, industrial, and infrastructure markets.

The 5P49V6975A000LTGI belongs to the VersaClock® 6E family-designed specifically for high-performance, multi-protocol timing in next-generation datacom and computing platforms where integration, flexibility, and jitter performance are critical.

FAQ

What is the function of the OUT0_SEL_I2CB pin on the 5P49V6975A000LTGI?

The OUT0_SEL_I2CB pin on the 5P49V6975A000LTGI latches its voltage state at power-up to configure the function of pins 8 and 9. A weak pull-up (10kΩ) sets them as hardware select pins (SEL1/SEL0); a weak pull-down or floating condition configures them as I²C SDA/SCL. After boot, this pin becomes an LVCMOS reference output (OUT0). This dual-mode design allows flexible system integration without redesigning the PCB layout for different configuration methods.

Does the 5P49V6975A000LTGI support PCIe Gen5 timing requirements?

Yes, the 5P49V6975A000LTGI supports PCIe Gen5 timing requirements through its <0.5ps RMS phase jitter (12kHz–20MHz), measured with 25MHz crystal input and configured outputs including 156.25MHz LVDS. Its fractional-N PLL architecture, 2.5–2.9GHz VCO range, and per-output spread spectrum modulation ensure compliance with PCIe Gen5 common-clock architecture jitter limits (tjphPCIeG5-CC), making it suitable for root complex and endpoint timing in Gen5 switches and accelerators.

Can the 5P49V6975A000LTGI generate both LVDS and LVPECL outputs simultaneously?

Yes, the 5P49V6975A000LTGI can generate LVDS and LVPECL outputs simultaneously. Each of its four output pairs (OUT1–OUT4) is independently configurable for LVPECL, LVDS, HCSL, or LVCMOS. Separate VDDOx power rails (e.g., VDDO2 = 2.5V for LVDS, VDDO3 = 3.3V for LVPECL) enable concurrent operation at different voltage levels and signal standards-eliminating need for external level translators in mixed-interface systems such as multi-protocol network processors.

What is the maximum output frequency supported by the 5P49V6975A000LTGI for LVCMOS signals?

The 5P49V6975A000LTGI supports LVCMOS output frequencies up to 200MHz, verified across all supported VDDOx supply voltages (1.8V, 2.5V, 3.3V). At 200MHz, typical current consumption is 43–56mA (3.3V), 33–43mA (2.5V), or 24–31mA (1.8V). The device maintains guaranteed duty cycle (40–60% at 1.8V, 45–55% at 2.5V/3.3V) and slew rate control (up to 2.7V/ns) across this full range, ensuring robust timing margins in high-speed microcontroller and FPGA clocking applications.

How does the internal crystal in the 5P49V6975A000LTGI improve system design?

The internal 25MHz crystal in the 5P49V6975A000LTGI eliminates external crystal components, load capacitors, and associated PCB layout tuning-reducing BOM count by up to 4 parts, saving ~3mm² board area, and removing crystal-related startup variability. With ±2ppm initial accuracy and ±20ppm temperature stability, it delivers consistent timing performance across industrial environments without requiring external calibration or compensation circuits, accelerating time-to-market for PCIe, Ethernet, and broadcast video platforms.