herunterladen
Xin/Clk 1 20 Xout
S0 2 19
S1/SDA
Vdd 3 18
S2/SCL
Vctr 4 17 Y1
GND 5 16 GND
Vddout 6 15 Y2
Y4 7 14 Y3
Y5 8 13 Vddout
GND 9 12 Y6
Vddout 10 11 Y7
Y4
Y5
V
DD
GND
Vctr
Vddout
S2/S1/S0or
SDA/SCL
Crystalor
ClockInput
Y1
VCXO
XO
LVCMOS
3
Y2
Y3
LV
CMOS
LV
CMOS
PLL1
withSSC
LV
CMOS
LV
CMOS
LV
CMOS
PLL2
withSSC
Y6
Y7
LV
CMOS
LV
CMOS
PLL3
withSSC
Divider
and
Output
Control
Programming
and
ControlRegister
EEPROM
CDCE937-Q1
CDCEL937-Q1
www.ti.com
SCAS892B –FEBRUARY 2010–REVISED MAY 2010
PROGRAMMABLE 3-PLL VCXO CLOCK SYNTHESIZER
WITH 1.8-V, 2.5-V, AND 3.3-V LVCMOS OUTPUTS
Check for Samples: CDCE937-Q1, CDCEL937-Q1
1
FEATURES
• Qualified for Automotive Applications • 1.8-V Device Power Supply
• Member of Programmable Clock Generator • Flexible Clock Driver
Family
– Three User-Definable Control Inputs
– CDCE913/CDCEL913: 1-PLL, 3 Outputs [S0/S1/S2]; e.g., SSC Selection, Frequency
Switching, Output Enable or Power Down
– CDCE925/CDCEL925: 2-PLL, 5 Outputs
– Generates Highly Accurate Clocks for
– CDCE937/CDCEL937: 3-PLL, 7 Outputs
Video, Audio, USB, IEEE1394, RFID,
– CDCE949/CDCEL949: 4-PLL, 9 Outputs
Bluetooth™, WLAN, Ethernet™, and GPS
• In-System Programmability and EEPROM
– Generates Common Clock Frequencies
– Serial Programmable Volatile Register
Used With TI DaVinci™, OMAP™, DSPs
– Nonvolatile EEPROM to Store Customer
– Programmable SSC Modulation
Setting
– Enables 0-PPM Clock Generation
• Flexible Input Clocking Concept
• Latch-Up Performance Meets 100 mA
– External Crystal: 8 MHz to 32 MHz
Per JESD 78, Class I
– On-Chip VCXO: Pull Range ±150 ppm
• Wide Temperature Range –40° C to 125° C
– Single-Ended LVCMOS up to 160 MHz
• Packaged in TSSOP
• Selectable Output Frequency up to 230 MHz
• Development and Programming Kit for Easy
• Low-Noise PLL Core
PLL Design and Programming (TI Pro-Clock™)
– Integrated PLL Loop Filter Components
APPLICATIONS
– Low Period Jitter (Typ 60 ps)
• D-TV, HD-TV, STB, IP-STB, DVD-Player,
• Separate Output Supply Pins
DVD-Recorder, Printer
– CDCE937: 3.3 V and 2.5 V
– CDCEL937: 1.8 V
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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