FX-424

FX-424 Low Jitter Frequency Translator Features • Quartz-based PLL for Ultra-Low Jitter • Frequency Translation up to 850 MHz • Accepts up to 4 ext.-muxed clock inputs • CMOS / LVDS / LVPECL Inputs compatible • Differential LVPECL or LVCMOS Output • Lock Detect / Loss of Signal Alarms • Output Disable • 20.3 x 13.7 x 5.1 mm SMT package • RoHS/Lead Free Compliant Description The FX-424 is a precision quartz-based frequency translator used to translate an input frequency such as 8 kHz, 1.544 MHz, 2.048 MHz, 19.44 MHz etc. to any specific frequency from 1.544 MHz to 850 MHz. The FX-424 can perform either up or down frequency conversion. The FX-424’s superior jitter performance is achieved through the use of a precision VCXO or VCSO. With the use of an external multiplexer, up to 4 different input clocks can be translated to a common output frequency. Applications • Wireless Infrastructure • 10 Gigabit FC • 10GbE LAN / WAN • OADM and IP Routers • Test Equipment • Military Communications Figure 1. Functional Block Diagram Vectron International, 267 Lowell Road, Hudson, NH 03051 Page 1 of 9 Tel: 1-88-VECTRON-1 • Web: www.vectron.com Rev: 08Dec06 FX-424 Low Jitter Frequency Translator Table 1. Electrical Performance Parameter Frequency Input Frequency Capture Range Output Frequency Supply Voltage Current (No Load) Input Signal CMOS LVPECL LVCMOS Output (Option A) Differential Output (Options F and P) Mid Level - LVPECL Swing - LVPECL Mid Level - LVDS Swing - LVDS Rise Time Fall Time Symmetry SSB Phase Noise, FOUT = 155.52/622.08 @ 10 Hz Offset @ 100 Hz Offset @ 1 kHz Offset @ 10 kHz Offset @ 100 kHz Offset @ 1 MHz Offset @ 10 MHz Offset Jitter Generation 155.52 MHz (12 kHz – 20 MHz BW) 622.08 MHz (12 kHz – 20 MHz BW) Operating Temperature 1. 2. 3. 4. 5. 6. Symbol FIN APR FOUT VCC ICC FIN FIN Minimum 0.008 ±40 1.544 3.13 Typical Maximum 170 850 Units MHz ppm MHz V mA Notes 1,2,3 1,2,3 1,2,3 2,3 3 2,3 2,3 3.3 45 CMOS LVPECL LVCMOS 3.46 60 VCC-1.4 450 VCC-2.4 250 tR tF SYM Φn Φn Φn Φn Φn Φn Φn ΦJ ΦJ TOP 45 VCC-1.25 600 VCC-2.3 410 0.5 0.5 50 -64/-27 -95/-55 -123/-85 -143/-110 -146/-130 -146/-146 -146/-146 0.30 0.12 VCC-1.0 950 VCC-2.5 450 55 V mV-pp V mV-pp ns ns % dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz ps RMS ps RMS 2,3 2,3 2,3 2,3 4,5 4,5 2,3 5,6 5, 6 1,3 -40 85 °C See Standard Frequencies and Ordering Information. Parameters are tested with production test circuit below (Fig 2). Parameters are tested at ambient temperature with test limits guard-banded for specified operating temperature. Measured from 20% to 80% of a full output swing (Fig 3). Not tested in production, guaranteed by design, verified at qualification. The FX-424 phase noise and jitter performance can be optimized for specific applications. Please consult with Vectron’s Application Engineers for more information. tR tF SYM = 100 x tA/tB VOH 80% 50% 20% VOL tA tB Figure 2. Test Circuit Figure 3. LVPECL Waveform Vectron International, 267 Lowell Road, Hudson, NH 03051 Page 2 of 9 Tel: 1-88-VECTRON-1 • Web: www.vectron.com Rev: 08Dec06 FX-424 Low Jitter Frequency Translator Figure 4. Pin Configuration Table 2. Pin Out Pin # 1 2 3 4 5 Symbol SEL0 SEL1 GND I/O I I GND Level LVTTL LVTTL Supply Function Input Frequency Select* Input Frequency Select* Case and Electrical Ground Not present VCXO Control Voltage Monitor Under locked conditions VMON should be > 0.3V and