3.Timing chart

4.Test circuit

1) Waveform observation

2) Current consumption

*Current consumption under the

disable function should be

= GND.

3) Condition

(1) Oscilloscope

· Band width should be minimum 5 times higher (wider) than measurement frequency.

· Probe earth should be placed closely from test point and lead length should be as short as possible

* Recommendable to use miniature socket. (Don’t use earth lead.)

(2) L_CMOS also includes probe capacitance.

(3) By-pass capacitor (0.01 µF to 0.1 µF) is placed closely between VCC and GND.

(4) Use the current meter whose internal impedance value is small.

(5) Power supply

· Start up time (0 %VCC to 90 %VCC) of power source should be more than 150 µs.

· Impedance of power supply should be as lowest as possible.

GND

tr

t

tw

tf

ST

OUT

GND

swich

supply

by-pass

capacitor

Test

Point

A

or

OE

or

OE

ST

OUT

GND

swich

supply

by-pass

capacitor

L_CMOS

Test Point

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