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CDCV857 Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce CDCV857
Description  2.5-V PHASE LOCK LOOP CLOCK DRIVER
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

CDCV857 Fiches technique(HTML) 5 Page - Texas Instruments

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CDCV857
2.5-V PHASE LOCK LOOP CLOCK DRIVER
SCAS645A – AUGUST 2000 – REVISED OCTOBER 2000
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
UNIT
VIK
Input voltage
All inputs
VDDQ = 2.3 V,
II = –18 mA
–1.2
V
VOH
High level output voltage
VDDQ = min to max, IOH = –1 mA
VDDQ– 0.1
V
VOH
High-level output voltage
VDDQ = 2.3 V,
IOH = –12 mA
1.7
V
VOL
Low level output voltage
VDDQ = min to max, IOL = 1 mA
0.1
V
VOL
Low-level output voltage
VDDQ = 2.3 V,
IOL = 12 mA
0.6
V
IOH
High-level output current
VDDQ = 2.3 V,
VO = 1 V
–18
–32
mA
IOL
Low-level output current
VDDQ = 2.3 V,
VO = 1.2 V
26
35
mA
VO
Output voltage swing
Differential outputs are terminated with
1.1
VDDQ– 0.4
VOX
Output differential
cross-voltage
w
Differential outputs are terminated with
120
VDDQ/2 – 0.2
VDDQ/2
VDDQ/2 + 0.2
V
II
Input current
VDDQ = 2.7 V,
VI = 0 V to 2.7 V
±10
µA
IOZ
High-impedance-state
output current
VDDQ = 2.7 V,
VO= VDDQ or GND
±10
µA
IDDPD
Power down current on
VDDQ + AVDD
CLK and CLK = 0 MHz; PWRDWN = Low;
Σ of IDD and AIDD
100
200
µA
IDD
Dynamic current on VDDQ
all outputs loaded
as shown in
fO = 200 MHz
275
330
mA
IDD
Dynamic current on VDDQ
as shown in
Figure 3
fO = 167 MHz
250
300
mA
AIDD
Supply current on AVDD
fO = 200 MHz
10
12
mA
AIDD
Supply current on AVDD
fO = 167 MHz
8
10
mA
CI
Input capacitance
VCC = 2.5 V
VI = VCC or GND
2
2.5
3
pF
CO
Output capacitance
VCC = 2.5 V
VO = VCC or GND
2.5
3
3.5
pF
† All typical values are at respective nominal VDDQ.
‡ The value of VOC is expected to be |VTR + VCP|/2. In case of each clock directly terminated by a 120-Ω resistor, where VTR is the true input
signal voltage and VCP is the complementary input signal voltage.
§ Differential cross-point voltage is expected to track variations of VDDQ and is the voltage at which the differential signals must be crossing.
timing requirements over recommended ranges of supply voltage and operating free-air
temperature
MIN
MAX
UNIT
fCK
Operating clock frequency
60
200
MHz
fCK
Application clock frequency
60
200
MHz
Input clock duty cycle
40%
60%
Stabilization time
W (PLL mode)
10
µs
Stabilization time
W (Bypass mode)
30
ns
¶ Time required for the integrated PLL circuit to obtain phase lock of its feedback signal to its reference signal. For phase lock to be obtained, a
fixed-frequency, fixed-phase reference signal must be present at CLK. Until phase lock is obtained, the specifications for propagation delay, skew,
and jitter parameters given in the switching characteristics table are not applicable. This parameter does not apply for input modulation under
SSC application.


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