VT98001QX

Advance Information VT98001 Multifrequency Synthesizer Applications = Set-top boxes = MPEG Video clock source General Description The Vaishali VT98001 is a single-chip, integrated multiple Phase Locked Loop (PLL) clock synthesizer. The device uses an analog Phase Locked Loop (PLL) to accept a 27 MHz crystal input to produce multiple outputs. Selection pins are used to provide various outputs. Features = = = = 24.576 MHz for Firewire IEEE1394 or video digitizer 24.576 MHz / 28.224 MHz for software or hardware modem 27 MHz buffered output clock 6.000MHz buffered output clock = = = = = 18.432 MHz for audio processor 2kHz standby clock Zero ppm synthesis error in all clocks (except the 2 kHz standby clock) 5V tolerant inputs 20-pin, 150 mil SSOP (QSOP) Figure 1. Functional Block Diagram VDD1 VDD2 VDD3 VDD4 ROM Table 24.576/ 28.224 MHz X2 Buffer osc 27 MHz Crystal Select 24/28 MHz PLL Multiplier X1 Buffer 24.576 MHz MODE 18.432MHz/ 6.000MHz Divider /PD Buffer Buffer Buffer Buffer 2kHz 27 MHz 27 MHz GND1 GND2 GND3 GND4 GND5 2001-07-25 Vaishali Semiconductor Page 1 www.vaishali.com 747 Camden Avenue, Suite C Campbell CA 95008 MDST-0013-00 Ph. 408.377.6060 Fax 408.377.6063 VT98001 Figure 2. Pin Configuration Advance Information VT98001 Select 24/28MHz X2 X1 VDD1 VDD2 GND1 GND2 24.576MHz MODE 24.576MHz/28.224MHz 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 GND5 27MHz 27MHz VDD4 VDD3 GND4 GND3 18.432MHz/6.000MHz /PD 2kHz Table 1. Pin Descri...