Catalog
Dual-Channel Any-to-Any Clock Generator IC
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 Outputs Per Channel
• * Any output frequency from <1Hz to 1035MHz
• * High-resolution fractional frequency conversion with 0ppm error
• * Each output has independent dividers
• * Output jitter as low as 0.16ps RMS (12kHz-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 glitch-less start/stop (stop high or low)
• * Automatic self-configuration at power-up from internal EEPROM; up to four configs, pin-selectable
• * SPI or I2C processor Interface
• * Numerically controlled oscillator mode
• * Spread-spectrum modulation mode
Description
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The ZL30245 is a flexible,
high-performance, clock multiplier/generator. From any input clock
frequency 9.72MHz to 1250MHz this device 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 ZL30245 has
output jitter of 160fs RMS (12kHz to 20MHz). Automatic
self-configuration from internal EEPROM
allows clock signals to be available immediately after power-up or
reset.