CDCVF855 datasheet(5/14 Pages) TI

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TIMING REQUIREMENTS

CDCVF855

SCAS839A – APRIL 2007 – REVISED MAY 2007

ELECTRICAL CHARACTERISTICS (continued)

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP (1)

MAX

UNIT

fO = 170 MHz

Without load

fO = 200 MHz

fO = 170 MHz

110

140

Differential outputs terminated

IDD

Dynamic current on VDDQ

with 120

Ω, C

L = 0 pF

fO = 200 MHz

120

150

fO = 170 MHz

130

160

Differential outputs terminated

with 120

Ω, C

L = 14 pF

fO = 200 MHz

140

170

Part-to-part input capacitance

∆C

VDDQ = 2.5 V, VI = VDDQ or GND

variation

Input capacitance difference

CI(∆)

between CLK and CLK, FBIN

VDDQ = 2.5 V, VI = VDDQ or GND

0.25

and FBIN

over recommended ranges of supply voltage and operating free-air temperature

PARAMETER

MIN

MAX

UNIT

Operating clock frequency

220

fCLK

MHz

Application clock frequency

220

Input clock duty cycle

40%

60%

Stabilization time (PLL mode)(1)

µs

Stabilization time (bypass mode)(2)

(1)

The 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 and VDD must be applied. 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.

(2)

A recovery time is required when the device goes from power-down mode into bypass mode (AVDD at GND).

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