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CDCE949PWG4 Arkusz danych(PDF) 7 Page - Texas Instruments

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Numer części CDCE949PWG4
Szczegółowy opis  Programmable 4-PLL VCXO Clock Synthesizer with 1.8V, 2.5V and 3.3V LVCMOS Outputs
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

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10pF
1kW
LVCMOS
CDCE949
CDCEL949
1kW
LVCMOS
LVCMOS
CDCE949
CDCEL949
TypicalDriver
Impedance
~32 W
LineImpedance
Zo=50 W
Series
Termination
~ 18 W
CDCE949
CDCEL949
www.ti.com
SCAS844D – AUGUST 2007 – REVISED MARCH 2010
DEVICE CHARACTERISTICS (Continued)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP(1)
MAX
UNIT
SAVE THIS CDCEL949 – LVCMOS PARAMETER FOR VDDOUT = 1.8 V – MODE
VDDOUT = 1.7 V, IOH = –0.1 mA
1.6
VOH
LVCMOS high-level output voltage
VDDOUT = 1.7 V, IOH = –4 mA
1.4
V
VDDOUT = 1.7 V, IOH = –8 mA
1.1
VDDOUT = 1.7 V, IOL = 0.1 mA
0.1
VOL
LVCMOS low-level output voltage
VDDOUT = 1.7 V, IOL = 4 mA
0.3
V
VDDOUT = 1.7 V, IOL = 8 mA
0.6
tPLH,
Propagation delay
PLL bypass
2.6
ns
tPHL
tr/tf
Rise and fall time
VDDOUT = 1.8 V (20%–80%)
0.7
ns
1 PLL switching, Y2-to-Y3
70
120
ps
tjit(cc)
Cycle-to-cycle jitter(2) (3)
4 PLLs switching, Y2-to-Y9
120
170
1 PLL switching, Y2-to-Y3
90
140
ps
tjit(per)
Peak-to-peak period jitter (2) (3)
4 PLLs switching, Y2-to-Y9
130
190
fOUT = 50 MHz; Y1-to-Y3
60
ps
tsk(o)
Output skew(4)
fOUT = 50 MHz; Y2-to-Y5 or Y6-to-Y9
160
odc
Output duty cycle(5)
fVCO = 100 MHz; Pdiv = 1
45
55
%
SDA/SCL PARAMETER
VIK
SCL and SDA input clamp voltage
VDD = 1.7 V; II = –18 mA
–1.2
V
IIH
SCL and SDA input current
VI = VDD; VDD = 1.9 V
±10
mA
VIH
SDA/SCL input high voltage(6)
0.7 VDD
V
0.3
VIL
SDA/SCL input low voltage(6)
V
VDD
0.2
VOL
SDA low-level output voltage
IOL = 3 mA, VDD = 1.7 V
V
VDD
CI
SCL/SDA input capacitance
VI = 0 V or VDD
3
10
pF
(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, (measured 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 same divider; data
sampled on rising edge (tr).
(5)
odc depends on output rise- and fall-time (tr/tf).
(6)
SDA and SCL pins are 3.3-V tolerant.
PARAMETER MEASUREMENT INFORMATION
Figure 1. Test Load
Figure 2. Test Load for 50
Ω Board Environment
Copyright © 2007–2010, Texas Instruments Incorporated
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Product Folder Link(s): CDCE949 CDCEL949


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