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CDCEL937PWRG4 датащи(PDF) 7 Page - Texas Instruments

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номер детали CDCEL937PWRG4
подробное описание детали  Programmable 3-PLL VCXO Clock Synthesizer With 1.8-V, 2.5-V and 3.3-V LVCMOS Outputs
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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CDCEL937PWRG4 датащи(HTML) 7 Page - Texas Instruments

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CDCE937
CDCEL937
www.ti.com
SLAS564F – 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
CDCE937 – 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
All 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
tjit(cc)
Cycle-to-cycle jitter(6) (7)
ps
3 PLL switching, Y2-to-Y7
100
150
1 PLL switching, Y2-to-Y3
70
100
tjit(per)
Peak-to-peak period jitter(8)
ps
3 PLL switching, Y2-to-Y7
120
180
fOUT = 50 MHz; Y1-to-Y3
60
tsk(o)
Output skew(8), See Table 2
ps
fOUT = 50 MHz; Y2-to-Y5
160
odc
Output duty cycle(9)
f(VCO) = 100 MHz; Pdiv = 1
45%
55%
CDCEL937 — 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
All 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
tjit(cc)
Cycle-to-cycle jitter(6) (7)
ps
3 PLL switching, Y2-to-Y7
100
150
1 PLL switching, Y2-to-Y3
90
140
ps
tjit(per)
Peak-to-peak period jitter(7)
3 PLL switching, Y2-to-Y7
120
190
fOUT = 50 MHz; Y1-to-Y3
60
tsk(o)
Output skew(8), See Table 2
ps
fOUT = 50 MHz; Y2-to-Y5
160
odc
Output duty cycle(9)
f(VCO) = 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(10)
0.7 VDD
V
VIL
SDA/SCL input low voltage(10)
0.3 VDD
V
VOL
SDA low-level output voltage
IOL = 3 mA, VDD = 1.7 V
0.2 VDD
V
CI
SCL/SDA Input capacitance
VI = 0 V or VDD
3
10
pF
(6)
10000 cycles.
(7)
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
(8)
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).
(9)
odc depends on output rise and fall time (tr/tf).
(10) SDA and SCL pins are 3.3 V tolerant.
Copyright © 2007–2010, Texas Instruments Incorporated
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