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CDCV857A データシート(PDF) 6 Page - Texas Instruments

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部品番号 CDCV857A
部品情報  2.5-V PHASE LOCK LOOP CLOCK DRIVER
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CDCV857A データシート(HTML) 6 Page - Texas Instruments

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CDCV857A
2.5-V PHASE LOCK LOOP CLOCK DRIVER
SCAS667A – APRIL 2001 – REVISED AUGUST 2002
6
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
Differential outputs
terminated with
fO = 180 MHz
275
330
IDD
Dynamic current on VDDQ
terminated with
120
Ω/CL = 14 pF
fO = 167 MHz
250
300
mA
IDD
Dynamic current on VDDQ
Differential outputs
terminated with
fO = 180 MHz
225
275
mA
terminated with
120
Ω/CL = 0 pF
fO = 167 MHz
210
250
AIDD
Supply current on AVDD
fO = 180 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
fCLK
Operating clock frequency
60
180
MHz
fCLK
Application clock frequency
60
180
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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