ZL30244,ZL30245
Dual-Channel Any-to-Any Clock Multiplier and Frequency Synthesizer ICs
Overview
| The ZL30244 and ZL30245 are flexible, high-performance, clock multiplier/synthesizer ICs. From any input clock frequency 9.72MHz to 1250MHz these devices can produce frequency-locked output frequencies from less than 1Hz to 1035MHz and as many as 6 differential or 12 CMOS output clock signals. The devices have industry-leading output jitter of 160fs RMS (12kHz to 20MHz). Automatic self-configuration from external (ZL30244) or internal (ZL30245) EEPROM allows clock signals to be available immediately after power-up or reset. |
White Paper: PCI Express Refclk Jitter Compliance
Applications/Uses
- Clocks for Processors, NPUs, FPGAs, 10G CDRs, high-speed ADCs and DACs, PCIe interface devices, Ethernet switches and PHYs
- Timing generation for optical, storage, networking and broadcast video applications
Key Features
- Two Independent APLL Channels
- Four Input Clocks per Channel
- One crystal/CMOS Input
- Two differential/CMOS inputs
- One single-ended/CMOS input
- Any input frequency from 9.72MHz to 1250MHz (9.72MHz to 300MHz for CMOS)
- Clock selection by pin or register control
- Low-Jitter Fractional-N APLL and 3 OutputsPer Channel
- Any output frequency from <1Hz to 1035MHz
- High-resolution fractional frequency conversion with 0ppm error
- Easy-to-configure, encapsulated design requires no external VCXO or loop filter components
- Each output has independent dividers
- Output jitter as low as 0.16ps RMS (12kHz to 20MHz integration band)
- Outputs are CML or 2xCMOS, can interface to LVDS, LVPECL, HSTL, SSTL and HCSL
- In 2xCMOS mode, the P and N pins can be different frequencies (e.g. 125MHz and 25MHz)
- Per-output supply pin with CMOS output voltages from 1.5V to 3.3V
- Precise output alignment circuitry and per-output phase adjustment
- Per-output enable/disable and glitchless start/stop (stop high or low)
General Features
- Automatic self-configuration at power-up from external (ZL30244) or internal (ZL30245) EEPROM; up to four configurations, pin-selectable
- Numerically controlled oscillator mode
- Spread-spectrum modulation mode
- SPI or I2C processor interface
- Space-saving 5x10mm LGA package
- Easy-to-use evaluation software
- Each channel of the ZL30245 can be ordered with up to four user-defined, factory-programmed device configurations
Resources
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