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CDCEL937QPWRQ1 Scheda tecnica(PDF) 6 Page - Texas Instruments

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Il numero della parte CDCEL937QPWRQ1
Spiegazioni elettronici  PROGRAMMABLE 3-PLL VCXO CLOCK SYNTHESIZER WITH 1.8-V, 2.5-V, AND 3.3-V LVCMOS OUTPUTS
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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CDCE937-Q1
CDCEL937-Q1
SCAS892B – FEBRUARY 2010 – REVISED MAY 2010
www.ti.com
DEVICE CHARACTERISTICS
over recommended operating ambient temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP(1)
MAX
UNIT
OVERALL PARAMETER
All PLLS on
29
All outputs off, f(CLK) = 27 MHz,
IDD
Supply current (see Figure 3)
mA
f(VCO) = 135 MHz
Per PLL
9
CDCE937,
3.1
VDDOUT = 3.3 V
No load, all outputs on,
IDDOUT
Output supply current (see Figure 4)
mA
fOUT = 27 MHz
CDCEL937,
1.5
VDDOUT = 1.8 V
Power-down current. Every circuit powered
IDD(PD)
fIN = 0 MHz,
VDD = 1.9 V
50
mA
down except SDA/SCL.
Supply voltage Vdd threshold for power-up
V(PUC)
0.85
1.45
V
control circuit
f(VCO)
VCO frequency range of PLL
80
230
MHz
Vddout = 3.3 V
230
fOUT
LVCMOS output frequency
MHz
Vddout = 1.8 V
230
LVCMOS PARAMETER
VIK
LVCMOS input voltage
VDD = 1.7 V; II = –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
–6
mA
Input capacitance at Xin/Clk
VI(Clk) = 0 V or VDD
6
CI
Input capacitance at Xout
VI(Xout) = 0 V or VDD
2
pF
Input capacitance at S0/S1/S2
VIS = 0 V or VDD
3
LVCMOS PARAMETER FOR Vddout = 3.3 V (CDCE937)
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
All 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
3 PLL switching, Y2-to-Y7
100
150
1 PLL switching, Y2-to-Y3
70
100
tjit(per)
Peak-to-peak period jitter(3)
ps
3 PLL switching, Y2-to-Y7
120
180
fOUT = 50 MHz; Y1-to-Y3
60
tsk(o)
Output skew (4) , See Table 2
ps
fOUT = 50 MHz; Y2-to-Y5
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 configuration. Data is taken under the following conditions: 1-PLL : fIN = 27MHz, Y2/3 = 27 MHz, (measured at Y2),
3-PLL: fIN = 27 MHz, Y2/3 = 27 MHz (measured at Y2), Y4/5 = 16.384 MHz, Y6/7 = 74.25 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
taking on rising edge (tr).
(5)
odc depends on output rise and fall time (tr/tf).
6
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Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): CDCE937-Q1


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