557GI-03LFT

Overview

The Renesas Electronics 557GI-03LFT is a spread spectrum clock generator and fan-out buffer designed for PCI Express Gen1 and Ethernet applications. It utilizes a phase-locked loop (PLL) to accept a 25 MHz crystal input and generate two differential outputs at frequencies of 25, 100, 125, or 200 MHz. The device supports HCSL and LVDS output signaling levels. Key electrical parameters include a maximum output frequency of 200 MHz, a maximum input frequency of 25 MHz, and an operating supply voltage range of 2.97 V to 3.63 V. It operates within a temperature range of -40°C to +85°C and is housed in a 16-TSSOP package.

Feature Summary

• Supports PCI Express Gen1 and Ethernet requirements with spread spectrum capabilities to reduce electromagnetic interference.
• Generates differential outputs at 25, 100, 125, or 200 MHz from a single 25 MHz crystal input.
• Configurable spread type and amount via select pins using patented PLL techniques.
• Compatible with HCSL and LVDS output signaling standards.

Applications

• PCI Express Gen1 clock source generation
• Ethernet system clock distribution
• PC and embedded systems requiring EMI reduction

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm pinout compatibility and electrical specifications. Packaging options may vary between tape-and-reel and cut-tape formats depending on the distributor. Confirm moisture sensitivity level (MSL 1) and lead-free status prior to assembly planning.

Selection Notes

Select this component when a low-pin-count solution is required for PCI Express Gen1 clocking. Ensure the design accommodates the 16-TSSOP package dimensions. Verify that the target application requires the specific output frequencies supported by the 557-03 series configuration. Check if HCSL or LVDS termination schemes align with the downstream receiver requirements.

Part Context

This part belongs to the 557G family of clock generators. It serves as a direct replacement for legacy ICS557GI-03LFT components. The device is distinct from the 557M-01LFT, which offers only one output, and the 557GI-05ALF, which provides four outputs in a TSSOP-20 package.

Replacement Considerations

Publicly documented similar alternatives include the NB3N51032DTG and NB3N51032DTR2G from onsemi. Verify functional equivalence regarding output count, frequency ranges, and package footprint before substitution.