SM5021 datasheet(8/12 Pages) NPC

8 / 12 page

SM5021 series

SEIKO NPC CORPORATION —8

TTL Output Version

5V operation: BA, BB, BC, BD, LD series

VDD = 4.5 to 5.5V, VSS = 0V, Ta = − 20 to + 80°C unless otherwise noted.

Current consumption and Output waveform with NPC’s standard crystal

FUNCTIONAL DESCRIPTION

Standby Function

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

Parameter

Symbol

Condition

Rating

Unit

min

typ

max

Output rise time

tr2

Measurement cct 6, load cct 2, 0.4V to 2.4V, CL = 15pF

–

2.5

Output fall time

tf2

Measurement cct 6, load cct 2, 2.4V to 0.4V, CL = 15pF

–

2.5

Output duty cycle*1

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

Duty

Measurement cct 6, load cct 2, VDD = 5V, Ta = 25°C, CL = 15pF,

≤ 70MHz

45–55

Output disable delay time

tPLZ

Measurement cct 6, load cct 2, VDD = 5V, Ta = 25°C, CL = 15pF

–

100

Output enable delay time

tPZL

–

100

INHN

Oscillator

HIGH (or open)

Normal operation

LOW

High impedance

Normal operation

f [MHz]

R [

Ω]

L [mH]

Ca [fF]

Cb [pF]

18.62

16.24

1.733

5.337

20.53

11.34

1.396

3.989

22.17

7.40

1.370

4.105

22.20

5.05

1.388

4.226

25.42

4.18

1.254

5.170

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