MK2771-15 Ver la hoja de datos (PDF) - Integrated Device Technology
Número de pieza
componentes Descripción
Fabricante
MK2771-15 Datasheet PDF : 7 Pages
| |||
VCXO AND SET-TOP CLOCK SOURCE
DATASHEET
MK2771-15
Description
The MK2771-15 is a low-cost, low-jitter, high-performance
VCXO and clock synthesizer designed for set-top boxes.
The on-chip Voltage Controlled Crystal Oscillator accepts a
0 to 3 V input voltage to cause the output clocks to vary by
±100 ppm. Using IDT’s patented VCXO and analog
Phase-Locked Loop (PLL) techniques, the device uses an
inexpensive 13.5 MHz pullable crystal input to produce
multiple output clocks including two selectable processor
clocks, a selectable audio clock, two communications
clocks, and three fixed clocks. All clocks are frequency
locked to the 27.00 MHz output (and to each other) with zero
ppm error, so any output can be used as the VCXO output.
Block Diagram
Features
• Packaged in 28 pin SSOP
• Available in Pb-free package
• Ideal for systems using Oak’s MPEG decoders
• On-chip patented VCXO with pull range of 200 ppm
• VCXO tuning voltage of 0 to 3 V
• Processor frequencies include 33.3, 40, 50, 66.6, 81, and
100 MHz
• Audio clocks of 8.192 MHz, 11.2896 MHz, 12.288 MHz
and 18.432 MHz
• Zero ppm synthesis error in all clocks (all exactly track 27
MHz VCXO)
• Uses an inexpensive 13.5 MHz pullable crystal
• Full CMOS output swings with 25 mA output drive
capability at TTL levels
• Advanced, low-power, sub-micron CMOS process
• 5 V operating voltage with 3.3 V capable I/O
NOTE: EOL for non-green parts to occur on
5/13/10 per PDN U-09-01
VDD VDDIO
PCS2:0
ACS1:0
SC
VIN
X1
13.5 MHz
pullable crystal
X2
3
2
Voltage
Controlled
Crystal
Oscillator
Clock
Synthesis
Circuitry
divide
by 2
divide
by 2
Processor Clocks
2
Audio Clock
Comm. Clocks
2
54.00 MHz
27.000 MHz
13.500 MHz
GND
IDT™ VCXO AND SET-TOP CLOCK SOURCE
1
MK2771-15 REV G 122109
Share Link: 