MPC903 MPC904 MPC905

TIMING SOLUTIONS

BR1333 — REV 5

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

TBD

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)