Crystal or Differential to Differential Clock Fanout Buffer
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Overview
Description
The 8T39S11A is a high-performance clock fanout buffer. The input clock can be selected from two differential inputs or one crystal input. The internal oscillator circuit is automatically disabled if the crystal input is not selected. The crystal pin can be driven by a single-ended clock.The selected signal is distributed to ten differential outputs which can be configured as LVPECL, LVDS or HSCL outputs. In addition, an LVCMOS output is provided. All outputs can be disabled into a high-impedance state. The device is designed for a signal fanout of high-frequency, low phase-noise clock and data signal. The outputs are at a defined level when inputs are open or tied to ground. It is designed to operate from a 3.3V or 2.5V core power supply, and either a 3.3V or 2.5V output operating supply.
Features
- Two differential reference clock input pairs
- Differential input pairs can accept the following differential input
levels: LVPECL, LVDS, HCSL, HSTL or Single Ended - Crystal Input accepts 10MHz to 40MHz Crystal or Single Ended Clock
- Maximum Output Frequency
LVPECL - 2GHz
LVDS - 2GHz
HCSL - 250MHz
LVCMOS - 250MHz - Two banks, each has five differential output pairs that can be
configured as LVPECL or LVDS or HCSL - One single-ended reference output with synchronous enable to avoid clock glitch
- Output skew: 80ps (maximum)
(Bank A and Bank B at the same output level) - Part-to-part skew: 200ps (typical)
- Additive RMS phase jitter @ 156.25MHz:
5.6fs RMS (10kHz - 1 MHz), typical @ 3.3V/ 3.3V
34.7fs RMS (12kHz - 20MHz), typical @ 3.3V/ 3.3V - Supply voltage modes:
VDD/VDDO
3.3V/3.3V
3.3V/2.5V
2.5V/2.5V - -40°C to 85°C ambient operating temperature
- Lead-free (RoHS 6) packaging
Applications
Documentation
| Document title | Document type
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Date Date | |
|---|---|---|---|
| PDF 1.15 MB | Datasheet | ||
| PDF 91 KB | Application Note | ||
| PDF 1.99 MB | Application Note | ||
| PDF 322 KB | Application Note | ||
| PDF 170 KB | Application Note | ||
| PDF 146 KB | Application Note | ||
| PDF 133 KB | Application Note | ||
| PDF 495 KB | Application Note | ||
| PDF 442 KB | Application Note | ||
| PDF 180 KB | Application Note | ||
| PDF 153 KB | Application Note | ||
| PDF 160 KB | Application Note | ||
| PDF 120 KB | Application Note | ||
| PDF 565 KB | Application Note | ||
| PDF 217 KB | Overview | ||
| PDF 1.83 MB | Overview | ||
| PDF 983 KB | Product Change Notice | ||
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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.
Product Options
Processing table
| VFQFPN | 48 | I | Yes | Tray | Get Samples, | |
| VFQFPN | 48 | I | Yes | Reel |
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play_circle_filledVideos & Training
News & Blog Posts
| Buff Up Your Design with Renesas Clock Buffers | Blog Post | Dec 15, 2018 |
