MPC9993

TIMING SOLUTIONS

5

MOTOROLA

Table 4. AC Characteristics (VCC = 3.3V ± 5%, TA = –40°C to +85°C)a

Symbol

Characteristics

Min

Typ

Max

Unit

Condition

fref

Input Reference Frequency

÷16 feedback

50

100

MHz

PLL locked

fVCO

VCO Frequency Rangeb

÷16 feedback

800

1600

MHz

fMAX

Output Frequency

QA[1:0]

QB[2:0]

50

100

100

200

MHz

MHz

PLL locked

frefDC

Reference Input Duty Cycle

25

75

%

t(

∅)

Propagation Delay

SPO, static phase offsetc

CLK0, CLK1 to any Q

-2.0

0.9

+2.0

1.8

ns

ns

PLL_EN=1

PLL_EN=0

VPP

Differential input voltaged

(peak-to-peak)

0.25

1.3

V

VCMR

Differential input crosspoint voltagee

VCC-1.7

VCC-0.3

V

tsk(O)

Output-to-output Skew

within QA[2:0] or QB[1:0]

within device

50

80

ps

ps

∆per/cycle

Rate of change of period

QA[1:0]f

QB[2:0]f

QA[1:0]g

QB[2:0]g

20

10

200

100

50

25

400

200

ps

ps

ps

ps

DC

Output Duty Cycle

45

50

55

%

tJIT(CC)

Cycle-to-Cycle Jitter

RMS (1

σ)

47

ps

tLOCK

Maximum PLL Lock Time

10

ms

tr, tf

Output Rise/Fall Time

0.05

0.70

ns

20% to 80%

a. AC characteristics apply for parallel output termination of 50

Ω to VCC - 2V.

b. The input reference frequency must match the VCO lock range divided by the feedback divider ratio (FB): fref = fVCO ÷ FB.

c. CLK0, CLK1 to Ext_FB.

d. VPP is the minimum differential input voltage swing required to maintain AC characteristics including SPO and device-to-device skew.

Applicable to CLK0, CLK1 and Ext_FB.

e. VCMR (AC) is the crosspoint of the differential input signal. Normal AC operation is obtained when the crosspoint is within the VCMR (AC)

range and the input swing lies within the V PP (AC) specification. Violation of VCMR (AC) or VPP (AC) impacts the SPO, device and

part-to-part skew. Applicable to CLK0, CLK1 and Ext_FB.

f.

Specification holds for a clock switch between two input signals (CLK0, CLK1) no greater than 400 ps out of phase. Delta period change

per cycle is averaged over the clock switch excursion.

g. Specification holds for a clock switch between two input signals (CLK0, CLK1) at any phase difference (

±180_). Delta period change per

cycle is averaged over the clock switch excursion.