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CDCEL925PWR Fiches technique(PDF) 6 Page - Texas Instruments

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No de pièce CDCEL925PWR
Description  PROGRAMMABLE 2-PLL VCXO CLOCK SYNTHESIZER WITH 1.8-V, 2.5-V and 3.3-V LVCMOS OUTPUTS
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

CDCEL925PWR Fiches technique(HTML) 6 Page - Texas Instruments

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CDCE925
CDCEL925
SCAS847F – JULY 2007 – REVISED MARCH 2010
www.ti.com
DEVICE CHARACTERISTICS
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP(1)
MAX
UNIT
OVERALL PARAMETER
All outputs off, fCLK=27 MHz,
All PLLS on
20
IDD
Supply current (see Figure 3)
fVCO = 135 MHz; fOUT = 27
mA
9
Per PLL
MHz
CDCE925 VDDOUT = 3.3 V
2
No load, all outputs on,
IDDOUT
Supply current (see Figure 4 and Figure 5)
mA
fOUT = 27 MHz
CDCEL925 VDDOUT = 1.8 V
1
Power-down current. Every circuit powered
IDDPD
fIN = 0 MHz,
VDD = 1.9 V
30
mA
down except SDA/SCL
Supply voltage VDD threshold for power-up
VPUC
0.85
1.45
V
control circuit
fVCO
VCO frequency range of PLL
80
230
MHz
fOUT
LVCMOS output frequency
CDCE(L)925 VDDOUT = 1.8 V
230
MHz
LVCMOS PARAMETER
VIK
LVCMOS input voltage
VDD = 1.7 V; Is = –18 mA
–1.2
V
II
LVCMOS Input current
VI = 0 V or VDD; VDD = 1.9 V
±5
mA
IIH
LVCMOS Input current for S0/S1/S2
VI = VDD; VDD = 1.9 V
5
mA
IIL
LVCMOS Input current for S0/S1/S2
VI = 0 V; VDD = 1.9 V
–4
mA
Input capacitance at Xin/Clk
VIClk = 0 V or VDD
6
CI
Input capacitance at Xout
VIXout = 0 V or VDD
2
pF
Input capacitance at S0/S1/S2
VIS = 0 V or VDD
3
CDCE925 - 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, tPHL
Propagation delay
All PLL bypass
3.2
ns
tr/tf
Rise and fall time
VDDOUT = 3.3 V (20%–80%)
0.6
ns
1 PLL switching, Y2-to-Y3
50
70
tjit(cc)
Cycle-to-cycle jitter(2) (3)
ps
2 PLL switching, Y2-to-Y5
90
130
1 PLL switching, Y2-to-Y3
60
100
tjit(per)
Peak-to-peak period jitter(3)
ps
2 PLL switching, Y2-to-Y5
100
160
fOUT = 50 MHz; Y1-to-Y3
70
tsk(o)
Output skew (4)
ps
fOUT = 50 MHz; Y2-to-Y5
150
odc
Output duty cycle (5)
fVCO = 100 MHz; Pdiv = 1
45%
55%
CDCE925 – 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, tPHL
Propagation delay
All PLL bypass
3.6
ns
tr/tf
Rise and fall time
VDDOUT = 2.5 V (20%–80%)
0.8
ns
(1)
All typical values are at respective nominal VDD.
(2)
10000 cycles.
(3)
Jitter depends on configuration. Jitter data is for input frequency = 27 MHz, fVCO = 135 MHz, fOUT = 27 MHz. fOUT = 3.072 MHz or input
frequency = 27 MHz, fVCO = 108 MHz, fOUT = 27 MHz. fOUT = 16.384 MHz, fOUT = 25 MHz, fOUT = 74.25 MHz, fOUT = 48 MHz
(4)
The tsk(o) specification is only valid for equal loading of each bank of outputs, and the 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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Product Folder Link(s): CDCE925 CDCEL925


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