CF5015 series

SEIKO NPC CORPORATION —7

5V operation (CF5015BL

×)

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

Measurement cct 3, load cct 1,

–

1.7

3.4

ns

–

3

6

Output fall time

Measurement cct 3, load cct 1,

–

1.7

3.4

ns

–

3

6

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

Duty1

Measurement cct 3, load cct 1,

f = 60MHz

45–55

%

*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.

–

–

100

ns

–

–

100

ns

* The 60MHz crystal parameter is confidential.

INHN

Q

Oscillator

HIGH (or open)

Normal operation

LOW

High impedance

Stopped

f [MHz]

R [

Ω]

L [mH]

Ca [fF]

Cb [pF]

50

16.12

6.88

1.48

1.18

60*

−−−−

L

Ca

R

Cb