Overview
Description
The 840002-01 is a two output LVCMOS/LVTTL Synthesizer optimized to generate Ethernet reference clock frequencies. Using a 25MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the two frequency select pins (F_SEL[1:0]): 156.25MHz, 125MHz, and 62.5MHz. The 840002-01 uses Renesas' third generation low phase noise VCO technology and can achieve 1ps or lower typical random rms phase jitter, easily meeting Ethernet jitter requirements. The 840002-01 is packaged in a small 16-pin TSSOP package.
Features
- Two LVCMOS/LVTTL outputs@ 3.3V, 17Ω typical output impedance
- Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended TEST_CLK
- Output frequency range: 56MHz to 175MHz
- VCO range: 560MHz to 700MHz
- Output skew: 12ps (maximum)
- RMS phase jitter at 156.25MHz, (1.875MHz to 20MHz): 0.47ps (typical)
Phase Noise:
Offset Noise Power
100Hz.................-97.4 dBc/Hz
1kHz...................-120.2 dBc/Hz
10kHz.................-127.6 dBc/Hz
100kHz...............-126.1 dBc/Hz - Full 3.3V or mixed 3.3V core/2.5V output supply modes
- -30°C to 85°C ambient operating temperature
- Available in lead-free (RoHS 6) packages
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.
Processing table
| TSSOP | 16 | C | Yes | Tube | ||
| TSSOP | 16 | C | Yes | Reel |
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