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CDCE925 データシート(PDF) 7 Page - Texas Instruments

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部品番号 CDCE925
部品情報  PROGRAMMABLE 2-PLL VCXO CLOCK SYNTHESIZER WITH 1.8-V, 2.5-V and 3.3-V LVCMOS OUTPUTS
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

CDCE925 データシート(HTML) 7 Page - Texas Instruments

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CDCE925
CDCEL925
www.ti.com
SCAS847F – JULY 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
1 PLL switching, Y2-to-Y3
50
70
tjit(cc)
Cycle-to-cycle jitter (6) (7)
ps
2 PLL switching, Y2-to-Y5
90
130
1 PLL switching, Y2-to-Y3
60
100
tjit(per)
Peak-to-peak period jitter (7)
ps
2 PLL switching, Y2-to-Y5
100
160
fOUT = 50 MHz; Y1-to-Y3
70
tsk(o)
Output skew (8)
ps
fOUT = 50 MHz; Y2-to-Y5
150
odc
Output duty cycle (9)
fVCO = 100 MHz; Pdiv = 1
45%
55%
CDCEL925 — 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, tPHL
Propagation delay
All PLL bypass
2.6
ns
tr/tf
Rise and fall time
VDDOUT = 1.8 V (20%–80%)
0.7
ns
1 PLL switching, Y2-to-Y3
80
110
tjit(cc)
Cycle-to-cycle jitter (6) (7)
ps
2 PLL switching, Y2-to-Y5
130
200
1 PLL switching, Y2-to-Y3
100
130
tjit(per)
Peak-to-peak period jitter (10)
ps
2 PLL switching, Y2-to-Y5
150
220
fOUT = 50 MHz; Y1-to-Y3
50
tsk(o)
Output skew (11)
ps
fOUT = 50 MHz; Y2-to-Y5
110
odc
Output duty cycle (12)
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(13)
0.7 VDD
V
VIL
SDA/SCL input low voltage(13)
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. 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
(8)
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).
(9)
odc depends on output rise- and fall time (tr/tf);
(10) 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
(11) 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).
(12) odc depends on output rise- and fall time (tr/tf);
(13) SDA and SCL pins are 3.3 V tolerant.
Copyright © 2007–2010, Texas Instruments Incorporated
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