CF5016 datasheet(5/8 Pages) NPC

5 / 8 page

CF5016 series

SEIKO NPC CORPORATION —5

Switching Characteristics

VDD = 1.6 to 2.0V, VSS = 0V, Ta = −40 to +85°C unless otherwise noted.

Current consumption and Output waveform with NPC’s standard crystal

FUNCTIONAL DESCRIPTION

Standby Function

When INHN goes LOW, the oscillator stops and the oscillator output on Q becomes high impedance.

Power-saving Pull-up Resistor

The INHN pull-up resistance changes in response to the input level (HIGH or LOW). When INHN goes LOW

(standby state), the pull-up resistance becomes large to reduce the current consumption during standby.

Parameter

Symbol

Condition

Rating

Unit

min

typ

max

Output rise time

tr1

Measurement cct 3, load cct 1,

0.2VDD to 0.8VDD

CL = 15pF

–

2.5

5.0

tr2

CL = 30pF

–

4.0

8.0

Output fall time

tf1

Measurement cct 3, load cct 1,

0.8VDD to 0.2VDD

CL = 15pF

–

2.5

5.0

tf2

CL = 30pF

–

4.0

8.0

Output duty cycle1

1. The duty cycle characteristic is checked the sample chips of each production lot.

Duty1

Measurement cct 3, load cct 1,

VDD = 1.8V, Ta = 25°C

CL = 15pF

f = 45MHz

45–55

Duty2

CL = 15pF

f = 50MHz

40–60

Duty3

CL = 30pF

f = 30MHz

45–55

Output disable delay time2

2. Oscillator stop function is built-in. When INHN goes LOW, normal output stops. When INHN goes HIGH, normal output is not resumed until after the

oscillator start-up time has elapsed.

tPLZ

Measurement cct 6, load cct 1, VDD = 1.8V, Ta = 25°C,

CL = 15pF

–

200

Output enable delay time2

tPZL

–

200

INHN

Oscillator

HIGH (or open)

Any fO, fO/2, fO/4, fO/8 or fO/16 output frequency

Normal operation

LOW

High impedance

Stopped

f [MHz]

R [

Ω]

L [mH]

Ca [fF]

Cb [pF]

5.26

2.82

9.99

2.68

8.24

5.72

2.77

2.22

16.12

6.88

1.43

1.18

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