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CDCE949PW Datenblatt(PDF) 4 Page - Texas Instruments

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Teilenummer CDCE949PW
Bauteilbeschribung  Programmable 4-PLL VCXO Clock Synthesizer with 1.8V, 2.5V and 3.3V LVCMOS Outputs
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
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CDCE949
CDCEL949
SCAS844D – AUGUST 2007 – REVISED MARCH 2010
www.ti.com
THERMAL RESISTANCE FOR TSSOP (PW) PACKAGE
(1)
AIRFLOW
TSSOP24
PARAMETER
(lfm)
°C/W
0
91
150
75
TJA
Thermal Resistance Junction to Ambient
200
74
250
73
500
65
TJC
Thermal Resistance Junction to Case
27
TJB
Thermal Resistance Junction to Board
52
RqJT
Thermal Resistance Junction to Top
0.5
RqJB
Thermal Resistance Junction to Bottom
50
(1)
The package thermal impedance is calculated in accordance with JESD 51 and JEDEC2S2P (high-k board).
RECOMMENDED OPERATING CONDITIONS
MIN
NOM
MAX
UNIT
VDD
Device supply voltage
1.7
1.8
1.9
V
CDCE949
2.3
3.6
Output Yx supply
VDD(OUT)
V
voltage
CDCEL949
1.7
1.9
VIL
Low level input voltage LVCMOS
0.3 × VDD
V
VIH
High level input voltage LVCMOS
0.7 × VDD
V
VI(thresh)
Input voltage threshold LVCMOS
0.5 × VDD
V
Input voltage range S0
0
1.9
VIS
V
Input voltage range S1,
VIthresh = 0.5 VDD
0
3.6
S2, SDA, SCL
VICLK
Input voltage range CLK
0
1.9
V
VDDout = 3.3 V
±12
mA
IOH /IOL
Output current
VDDout = 2.5 V
±10
mA
VDDout = 1.8 V
±8
mA
CL
Output load LVCMOS
10
pF
TA
Operating free-air temperature
–40
85
°C
RECOMMENDED CRYSTAL/VCXO SPECIFICATIONS
(1)
MIN
NOM
MAX
UNIT
fXtal
Crystal Input frequency range (fundamental mode)
8
27
32
MHz
ESR
Effective series resistance
100
fPR
Pulling range (0 V
≤ VCtrl ≤ 1.8 V)
(2)
±120
±150
ppm
V(Ctrl)
Frequency control voltage
0
VDD
V
C0/C1
Pullability ratio
220
CL
On-chip load capacitance at Xin and Xout
0
20
pF
(1)
For more information about VCXO configuration and crystal recommendation see application report SCAA085.
(2)
Pulling range depends on crystal type, on-chip crystal load capacitance and PCB stray capacitance; pulling range of min ±120 ppm
applies for crystal listed in the application report SCAA085.
EEPROM SPECIFICATION
MIN
TYP
MAX
UNIT
EEcyc
EEcyc programming cycles of EEPROM
1000
cycles
EEret
EEret data retention
10
years
4
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Copyright © 2007–2010, Texas Instruments Incorporated
Product Folder Link(s): CDCE949 CDCEL949


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