MC88LV915 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

MFG CO.

MC88LV915

Low Voltage Low Skew CMOS PLL Clock Driver, 3-State

Motorola => Freescale 

MC88LV915T

SYNC INPUT

(SYNC[1] or

SYNC[0])

FEEDBACK

INPUT

Applications Information for All Versions

tCYCLE SYNC INPUT

t PD

Q/2 OUTPUT

tSKEWALL

Q0 – Q4

OUTPUTS

Q5 OUTPUT

tSKEWf

tSKEWr

tSKEWf

tCYCLE “Q” OUTPUTS

tSKEWR

2X_Q OUTPUT

Figure 1. Output/Input Switching Waveforms and Timing Diagrams

(These waveforms represent the hook–up configuration of Figure 2a on page 7)

Timing Notes:

• The MC88LV915T aligns rising edges of the FEEDBACK input and SYNC input, therefore the SYNC input

does not require a 50% duty cycle.

• All skew specs are measured between the VCC/2 crossing point of the appropriate output edges.All skews

are specified as ‘windows’, not as a ± deviation around a center point.

• If a “Q” output is connected to the FEEDBACK input (this situation is not shown), the “Q” output frequency

would match the SYNC input frequency, the 2X_Q output would run at twice the SYNC frequency, and the

Q/2 output would run at half the SYNC frequency.

MOTOROLA

6

TIMING SOLUTIONS

BR1333 — Rev 6

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