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CDCE949PWR Fiches technique(PDF) 6 Page - Texas Instruments

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No de pièce CDCE949PWR
Description  Programmable 4-PLL VCXO Clock Synthesizer with 1.8V, 2.5V and 3.3V LVCMOS Outputs
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

CDCE949PWR Fiches technique(HTML) 6 Page - Texas Instruments

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DEVICE CHARACTERISTICS (Continued)
CDCE949
CDCEL949
SCAS844 – JUNE 2007
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP(1)
MAX
UNIT
CDCE949 – LVCMOS PARAMETER FOR VDDOUT = 3.3 V – MODE
VDDOUT = 3 V, IOH = –0.1 mA
2.9
VOH
LVCMOS high-level output voltage
VDDOUT = 3 V, IOH = –8 mA
2.4
V
VDDOUT = 3 V, IOH = –12 mA
2.2
VDDOUT = 3 V, IOL = 0.1 mA
0.1
VOL
LVCMOS low-level output voltage
VDDOUT = 3 V, IOL = 8 mA
0.5
V
VDDOUT = 3 V, IOL = 12 mA
0.8
tPLH,
Propagation delay
PLL bypass
3.2
ns
tPHL
tr/tf
Rise and fall time
VDDOUT = 3.3 V (20%–80%)
0.6
ns
1 PLL switching, Y2-to-Y3
60
90
tjit(cc)
Cycle-to-cycle jitter(2)(3)
ps
4 PLLs switching, Y2-to-Y9
120
170
1 PLL switching, Y2-to-Y3
70
100
tjit(per)
Peak-to-peak period jitter (2)(3)
ps
4 PLLs switching, Y2-to-Y9
130
180
fOUT = 50 MHz; Y1-to-Y3
60
tsk(o)
Output skew(4)
ps
fOUT = 50 MHz; Y2-to-Y5 or Y6-to-Y9
160
odc
Output duty cycle(5)
fVCO = 100 MHz; Pdiv = 1
45
55
%
CDCE949 – LVCMOS PARAMETER FOR VDDOUT = 2.5 V – MODE
VDDOUT = 2.3 V, IOH = –0.1 mA
2.2
VOH
LVCMOS high-level output voltage
VDDOUT = 2.3 V, IOH = –6 mA
1.7
V
VDDOUT = 2.3 V, IOH = –10 mA
1.6
VDDOUT = 2.3 V, IOL = 0.1 mA
0.1
VOL
LVCMOS low-level output voltage
VDDOUT = 2.3 V, IOL = 6 mA
0.5
V
VDDOUT = 2.3 V, IOL = 10 mA
0.7
tPLH,
Propagation delay
PLL bypass
3.4
ns
tPHL
tr/tf
Rise and fall time
VDDOUT = 2.5 V (20%–80%)
0.8
ns
1 PLL switching, Y2-to-Y3
60
90
ps
tjit(cc)
Cycle-to-cycle jitter (2)(3)
4 PLLs switching, Y2-to-Y9
120
170
1 PLL switching, Y2-to-Y3
70
100
ps
tjit(per)
Peak-to-peak period jitter (2)(3)
4 PLLs switching, Y2-to-Y9
130
180
fOUT = 50 MHz; Y1-to-Y3
60
tsk(o)
Output skew(4)
ps
fOUT = 50 MHz; Y2-to-Y5 or Y6-to-Y9
160
odc
Output duty cycle(5)
fVCO = 100 MHz; Pdiv = 1
45
55
%
(1)
All typical values are at respective nominal VDD.
(2)
10000 cycles.
(3)
Jitter depends on device configuration. Data is taken under the following conditions: 1-PLL: fIN = 27 MHz, Y2/3 = 27 MHz, (measured at
Y2), 4-PLL: fIN = 27 MHz, Y2/3 = 27 MHz, (manured at Y2), Y4/5 = 16.384 MHz, Y6/7 = 74.25 MHz, Y8/9 = 48 MHz.
(4)
The tsk(o) specification is only valid for equal loading of each bank of outputs and outputs are generated from the same divider; data
sampled on rising edge (tr).
(5)
odc depends on output rise- and fall-time (tr/tf).
6
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