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MK3771-17

ICST
Part Number MK3771-17
Manufacturer ICST
Description VCXO and HDTV Set-Top Clock Source
Published Feb 17, 2007
Detailed Description www.DataSheet4U.com MK3771-17 VCXO and HDTV Set-Top Clock Source Description The MK3771-17 is a low cost, low jitter, h...
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MK3771-17
MK3771-17

Overview
www.
DataSheet4U.
com MK3771-17 VCXO and HDTV Set-Top Clock Source Description The MK3771-17 is a low cost, low jitter, high-perfomance VCXO and clock synthesizer designed for set-top boxes and HDTV receivers.
The on-chip Voltage Controlled Crystal Oscillator accepts a 0 to 3.
3 V input voltage to cause the output clocks to vary by ±100 ppm.
Using ICS’s patented VCXO and analog Phase-Locked Loop (PLL) techniques, the device uses an inexpensive 13.
5 MHz crystal input to produce multiple output clocks including selectable BCLK, a selectable audio clock, two communications clocks, a 13.
5 MHz clock, and three 27 MHz clocks.
All clocks are frequency locked to the 27 MHz output (and to each other) with zero ppm error, so any output can be used as the VCXO output.
Features • • • • • • • • Packaged in 28-pin SSOP Available in Pb (lead) free package HDTV frequencies of 74.
25 and 74.
175824 MHz On-chip patented VCXO with pull range of 200 ppm (minimum) VCXO tuning voltage of 0 to 3.
3 V Supports Ethernet with 20 and 25 MHz clocks Modem clocks of 11.
0592 and 24.
576 MHz option Audio clocks support 32 kHz, 44.
1 kHz, 48 kHz and 96 kHz sampling rates track 27MHz VCXO) • Zero ppm synthesis error in all clocks (all exactly • • • • • Uses an inexpensive 13.
5 MHz crystal Full CMOS output swings with 12 mA output drive capability at TTL levels Advanced, low power, sub-micron CMOS process 3.
3 V ±5% operating supply Block Diagram AS2:0 BS1, BS0 CS VIN 3 2 Audio Clock PLL Clock Synthesis Circuitry BCLK CCLK1 CCLK2 XI 13.
5 MHz pullable crystal XO Voltage Controlled Crystal Oscillator X8 PLL Divide Logic 108 MHz or 27 MHz 54 MHz or 27 MHz 27 MHz 13.
5 MHz or 27 MHz VS MDS 3771-17 C Integrated Circuit Systems, Inc.
● 1 525 Race Street, San Jose, CA 95126 ● Revision 083104 tel (408) 297-1201 ● www.
icst.
com MK3771-17 VCXO and HDTV Set-Top Clock Source Pin Assignment BS0 X2 X1 VDD VDD VIN VDD VDD CS GND GND BCLK VS ACLK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 ...


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