MPC905

TIMING SOLUTIONS

DL207 — Rev 0

3

MOTOROLA

AC CHARACTERISTICS (TA = 0–70°C; VDD = 3.3V ±0.3V)

Symbol

Characteristic

Min

Typ

Max

Unit

Condition

Fmax

Maximum Operating

Using External Crystal

Frequency

Using External Clock Source

–

DC

50

100

MHz

tpw

Output Pulse Width

HIGH (Above 2.0V)

LOW (Below 0.8V)

HIGH (Above 2.0V)

LOW (Below 0.8V)

0.40T1

0.40T1

0.45T2

0.45T2

0.60T1

0.60T1

0.55T2

0.55T2

T = Periods

tper

Output Period

T – 400ps

T = Desired Period

tos

Output-to-Output Skew

Rising Edges

Falling Edges

400

500

ps

tr, tf

Rise/Fall Times (Slew Rate)

1

4

V/ns

Series Terminated

Transmission Lines

tEN

Enable Time

Enable1

Enable2

5

4

ms

Cycles

tDIS

Disable Time

Enable1

Enable2

4

4

Cycles

Aosc

XTAL_IN to XTAL_OUT Oscillator Gain

6

db

Phase

Loop Phase Shift Modulo 360

° +

30

Degrees

1. Assuming input duty cycle specs from Recommended Operationg Conditions table are met.

2. Assuming external crystal or 50% duty cycle external reference is used.

Figure 1. Crystal Oscillator Interface

(Fundamental)

100

Ω

Pin 1

Pin 16

Y1

33.3333MHz

16pF

10pF

C1

C3

Figure 2. Crystal Oscillator Interface

(3rd Overtone)

CTRAP

Pin 1

Pin 16

Y1

11.1111MHz

16pF

10pF

C1

C3

LTRAP

fFUND +

1

2

p LTRAP CTRAP

Table 1. Crystal Specifications

Parameter

Value

Crystal Cut

Fundamental AT Cut

Resonance

Parallel Resonance*

Frequency Tolerance

±75ppm at 25°C

Frequency/Temperature Stability

±150pm 0 to 70°C

Operating Range

0 to 70

°C

Shunt Capacitance

5–7pF

Equivalent Series Resistance (ESR)

50 to 80

Ω

Correlation Drive Level

100

µW

Aging

5ppm/Yr (First 3 Years)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MPC905

1:6 PCI Clock Generator/Fanout Buffer

NETCOM

IDT™ 1:6 PCI Clock Generator/Fanout Buffer

Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc

MPC905

3