Overview
Description
The 557-05A is a spread-spectrum clock generator that supports PCI-Express requirements. It is used in PC or embedded systems to substantially reduce electro-magnetic interference (EMI). The device provides four differential HCSL or LVDS high-frequency outputs with spread spectrum capability. The output frequency and spread type are selectable using external pins.
Features
- Packaged in 20-pin TSSOP
- RoHS 5 (green) or RoHS 6 (green and lead free) complaint package
- Supports PCI-Express applications
- Four differential spread spectrum clock outputs
- Spread spectrum for EMI reduction
- Uses external 25 MHz clock or crystal input
- Power down pin turns off chip
- OE control tri-states outputs
- Spread and frequency selection via external pins
- Spread Bypass option available
- Industrial temperature range available
- For PCIe Gen2 applications, see the 5V41066
- For PCIe Gen3 applications, see the 5V41236
Comparison
Applications
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
| TSSOP | 20 | C | Yes | Tube | 1 | 1.887 | Get Samples, | |
| TSSOP | 20 | C | Yes | Reel | 1 | |||
| TSSOP | 20 | I | Yes | Tube | 1 | 3.068 | Get Samples, | |
| TSSOP | 20 | I | Yes | Reel | 1 | 4.03 |
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Videos & Training
This is the first video in our PCIe series. In this video, we define PCIe architectures, focusing on common and separate clock architectures. Watch the rest of the video series below where Ron will cover the impact of different timing architectures.
Watch the Video Series Below
