SM8702AM 查看數據表（PDF） - Nippon Precision Circuits

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SM8702AM

Clock Generator IC

Nippon Precision Circuits  

SM8702AM

AC Electrical Characteristics

CPU clock characteristics 1

Ta = 0 to 70°C, VDD = 3.3V ± 5%, VDDL = 2.5V ± 5%, VSS = 0V, fX’tal = 14.318MHz, CL = 20pF unless other-

wise noted.

Parameter

Output clock rise time1

Output clock fall time1

Duty cycle

Output clock jitter1

Output clock skew 1

Symbol

Condition

Rating

Unit

min

typ

max

tr

VOL = 0.4V → VOH = 2.0V transition time

–

tf

VOH = 2.0V → VOL = 0.4V transition time

–

Dt VT = 1.25V

45

tjc V T = 1.25V, rising edge Cycle-to-cycle jitter

–

ts k w

V T = 1.25V, rising edge

Between CPUCLK0 and

CPUCLK1

–

–

2.0

ns

–

2.0

ns

50

55

%

–

250

ps

–

250

ps

Clock frequency stabilize time1

Output impedance2

tstb Cold start

ZO

VO = 0.5VDDL

Supply ON (VDD = 3.3V)

until clock reaches

–

–

3

ms

specified frequency

10

–

90

Ω

1. Design maximum values, not 100% guaranteed.

2. Design estimate values, not 100% guaranteed.

CPU clock characteristics 2

Ta = 0 to 70°C, VDD = VDDL = 3.3V ± 5%, VSS = 0V, fX’tal = 14.318MHz, CL = 20pF unless otherwise noted.

Parameter

Output clock rise time1

Output clock fall time1

Duty cycle

Output clock jitter1

Output clock skew 1

Symbol

Condition

Rating

Unit

min

typ

max

tr

VOL = 0.4V → VOH = 2.4V transition time

–

tf

VOH = 2.4V → VOL = 0.4V transition time

–

Dt VT = 1.5V

45

tjc V T = 1.5V, rising edge Cycle-to-cycle jitter

–

ts k w

V T = 1.5V, rising edge

Between CPUCLK0 and

CPUCLK1

–

–

2.5

ns

–

2.5

ns

50

55

%

–

250

ps

–

250

ps

Clock frequency stabilize time1

Output impedance2

tstb Cold start

ZO

VO = 0.5VDDL

Supply ON (VDD = 3.3V)

until clock reaches

–

–

3

ms

specified frequency

10

–

60

Ω

1. Design maximum values, not 100% guaranteed.

2. Design estimate values, not 100% guaranteed.

NIPPON PRECISION CIRCUITS—7

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